Electronic Fundamentals Past Questions PDF

CARVER TRAINING AND SERVICE PVT LTD Module 04(B2) Electronic Fundamentals 4.1.1. Semiconductors - Diodes. 1. The weight of the atom is depend on the addition of ……………….. a. no. of protons + no. of neutrons b. no. of protons c. no. of neutrons d. All of...

CARVER TRAINING AND SERVICE PVT LTD Module 04(B2) Electronic Fundamentals 4.1.1. Semiconductors - Diodes. 1. The weight of the atom is depend on the addition of ……………….. a. no. of protons + no. of neutrons b. no. of protons c. no. of neutrons d. All of the above Principal of electronics V. K. Mehta Page no.-3 2. The atomic number of the atom is depend on the ……………….. a. no. of protons + no. of neutrons b. no. of protons c. no. of neutrons d. All of the above  CARVER TRAINING AND SERVICE PVT LTD Principal of electronics V. K. Mehta Page no.-3 3. The electron in any orbit of such an atom can have a range of energies rather than a single energy is known as ……………. a. Energy band. b. Energy level c. Both a & b d. All of the above Principal of electronics V. K. Mehta Page no.-50 4. The electrons in the outermost orbit of an atom are known as ………………….. a. Valence electrons b. Conduction electron c. Both a & b d. Conduction band Principal of electronics V. K. Mehta Page no.-3 5. The separation between conduction band and valence band on the energy level diagram is known as …………. a. forbidden energy gap  CARVER TRAINING AND SERVICE PVT LTD b. Energy gap c. Valence band gap d. Conduction band gap Principal of electronics V. K. Mehta Page no.-51 6. In insulator , the energy gap between valence and conduction bands is =………………. a. 15 eV b. 1eV c. 0eV d. 18 eV Principal of electronics V. K. Mehta Page no.-53 7. In semiconductor , the energy gap between valence and conduction bands is =………………. a. 15 eV b. 1eV c. 0eV d. 18 eV  CARVER TRAINING AND SERVICE PVT LTD Principal of electronics V. K. Mehta Page no.-53 8. In conductor, the energy gap between valence and conduction bands is =………………. a. 15 eV b. 1eV c. 0eV d. 18 eV Principal of electronics V. K. Mehta Page no.-53 9. An extremely pure semiconductor is called as ………………….. a. Intrinsic Semiconductor b. Extrinsic Semiconductor c. Both a & b d. None of these Principal of electronics V. K. Mehta Page no.-64 10. The process of adding impurities to a semiconductor is known as …………  CARVER TRAINING AND SERVICE PVT LTD a. Doping b. Intrinsic Semiconductor c. Atom d. Both a & b Principal of electronics V. K. Mehta Page no.-67 11. The germanium atom has ……………….valence electrons. a. Four b. Five c. Six d. One Principal of electronics V. K. Mehta Page no.-67 12. When a small amount of trivalent impurity is added to a pure semiconductor, it is called …….. a. p-type semiconductor. b. n-type semiconductor. c. Both a & b d. Non of these  CARVER TRAINING AND SERVICE PVT LTD Principal of electronics V. K. Mehta Page no.-64 13. A semiconductor is formed by........ bonds. a. covalent b. electrovalent c. co-ordinate d. none of the above Principal of electronics V. K. Mehta Page no.-61 14. A semiconductor has........ temperature coefficient of resistance. a. positive b. zero c. negative d. none of the above Principal of electronics V. K. Mehta Page no.-73 15. The most commonly used semiconductor is........ a. germanium b. silicon c. carbon d. sulphur Principal of electronics V. K. Mehta Page no.-73 16. A semiconductor has generally........valence electrons. a. 2 b. 3  CARVER TRAINING AND SERVICE PVT LTD c. 6 d. 4 Principal of electronics V. K. Mehta Page no.-58 17. The resistivity of pure germanium under standard conditions is about........ 4 a. 6 *10 ohm cm b. 60 ohm cm 6 c. 3 *10 ohm cm 4 d. 6 *10 ohm cm Principal of electronics V. K. Mehta chapter no.5 18. The resistivity of pure silicon is about........ a. 6 *104 ohm cm b. 6000 ohm cm c. 3 *106 ohm cm d. 6 *104ohm cm Principal of electronics V. K. Mehta chapter no.5 19. When a pentavalent impurity is added to a pure semiconductor, it becomes........ a. an insulator b. an intrinsic semiconductor c. p-type semiconductor d. n-type semiconductor Principal of electronics V. K. Mehta chapter no.5 20. Addition of pentavalent impurity to a semiconductor creates many........ a. free electrons b. holes  CARVER TRAINING AND SERVICE PVT LTD c. valence electrons d. bound electrons Principal of electronics V. K. Mehta chapter no.5 21. A pentavalent impurity has........ valence electrons. a. 3 b. 5 c. 4 d. 6 Principal of electronics V. K. Mehta chapter no.5 22. An n-type semiconductor is........ a. positively charged b. negatively charged c. electrically neutral d. none of the above Principal of electronics V. K. Mehta chapter no.5 23. A trivalent impurity has........ valence electrons.  CARVER TRAINING AND SERVICE PVT LTD a. 4 b. 5 c. 6 d. 3 Principal of electronics V. K. Mehta chapter no.5 24. Addition of trivalent impurity to a semiconductor creates many........ a. holes b. free electrons c. valence electrons d. bound electrons Principal of electronics V. K. Mehta chapter no.5 25. A hole in a semiconductor is defined as........ a. a free electron b. the incomplete part of an electron pair bond c. a free proton d. a free neutron Principal of electronics V. K. Mehta chapter no.5 26. The impurity level in an extrinsic semiconductor is about........ of pure semiconductor. a. 10 atoms for 108 atoms b. 1 atom for 108 atoms c. 1 atom for 104 atoms d. 1 atom for 100 atoms  CARVER TRAINING AND SERVICE PVT LTD Principal of electronics V. K. Mehta chapter no.5 27. As the doping to a pure semiconductor increases, the bulk resistance of the semiconductor........ a. remains the same b. increases c. decreases d. none of the above Principal of electronics V. K. Mehta chapter no.5 28. In a semiconductor, current conduction is due........ a. only to holes b. only to free electrons c. to holes and free electrons d. none of the above Principal of electronics V. K. Mehta chapter no.5 29. The battery connections required to forward bias a pn junction are........ a. +ve terminal to p and -ve terminal to n b. -ve terminal to p and +ve terminal to n c. -ve terminal to p and -ve terminal to n d. none of the above Principal of electronics V. K. Mehta chapter no.5 30. The battery connections required to forward bias a pn junction are........ a. +ve terminal to p and ve terminal to n b. ve terminal to p and +ve terminal to n c. ve terminal to p and ve terminal to n d. none of the above  CARVER TRAINING AND SERVICE PVT LTD Principal of electronics V. K. Mehta chapter no.5 31. In the depletion region of a pn junction, there is a shortage of.......... a. acceptor ions b. holes and electrons c. donor ions d. none of the above Principal of electronics V. K. Mehta chapter no.5 32. A reverse biased pn junction has........ a. very narrow depletion layer b. almost no current c. very low resistance d. large current flow Principal of electronics V. K. Mehta chapter no.5 33. A pn junction acts as a........ a. controlled switch b. bidirectional switch c. unidirectional switch d. none of the above Principal of electronics V. K. Mehta chapter no.5 34. When a p-type semiconductor is suitably joined to n-type semiconductor, the contact surface is called …………….. a. PN junction. b. Transistor  CARVER TRAINING AND SERVICE PVT LTD c. Capacitor d. Resistor Principal of electronics V. K. Mehta chapter no.5 35. A crystal diode has ……… a. one PN junction b. two PN junctions c. three PN junctions d. none of the above Principal of electronics V. K. Mehta chapter no.5 36. A crystal diode has forward resistance of the order of …………… a. kΩ b. Ω c. MΩ d. none of the above Principal of electronics V. K. Mehta chapter no.5 37.The reverse current in a diode is of the order of ………………. a. kA b. mA  CARVER TRAINING AND SERVICE PVT LTD c. μA d. A Principal of electronics V. K. Mehta chapter no.5 38. The forward voltage drop across a silicon diode is about ………………… a. 2.5 V b. 3V c. 10 V d. 0.7 V Principal of electronics V. K. Mehta chapter no.5 39. A crystal diode is used as …………… a. an amplifier b. a rectifier c. an oscillator d. a voltage regulator Principal of electronics V. K. Mehta chapter no.5 40. The leakage current in a crystal diode is due to ……………. a. minority carriers b. majority carriers c. junction capacitance d. none of the above Principal of electronics V. K. Mehta chapter no.5 41. If the temperature of a crystal diode increases, then leakage current ……….. a. remains the same b. decreases  CARVER TRAINING AND SERVICE PVT LTD c. increases d. becomes zero Principal of electronics V. K. Mehta chapter no.5 42. The knee voltage of a crystal diode is approximately equal to …………. a. applied voltage b. breakdown voltage c. forward voltage d. barrier potential Principal of electronics V. K. Mehta chapter no.5 43. When the crystal current diode current is large, the bias is ………… a. forward b. inverse c. poor d. reverse Principal of electronics V. K. Mehta chapter no.5 44. A crystal diode is a …………… device a. non-linear b. bilateral c. linear d. none of the above Principal of electronics V. K. Mehta Page no.55  CARVER TRAINING AND SERVICE PVT LTD 45. The arrow direction in the diode symbol indicates a. Direction of electron flow. b. Direction of conventional current c. Opposite to the direction of hole flow d. None of the above Principal of electronics V. K. Mehta Page no.55 46. The forward voltage drop across a germanium diode is about ………………… a. 2.5 V b. 0.3 V c. 10 V d. 0.7 V Principal of electronics V. K. Mehta Page no.72 47. When the diode is forward biased, it is equivalent to a. An off switch b. An On switch c. A high resistance d. None of the above Principal of electronics V. K. Mehta Page no.72 48. Under normal reverse bias voltage applied to diode, the reverse current in Si diode a. 100 mA b. order of μA c. 1000 μA d. None of these Principal of electronics V. K. Mehta chapter no.72  CARVER TRAINING AND SERVICE PVT LTD 49. When P-N junction is in forward bias, by increasing the battery voltage a. Circuit resistance increases b. Current through P-N junction increases c. Current through P-N junction decreases d. None of the above happens Principal of electronics V. K. Mehta chapter no.5 50. When a PN junction is reverse-biased a. Holes and electrons tend to concentrate towards the junction b. The barrier tends to break down c. Holes and electrons tend to move away from the junction d. None of the above Principal of electronics V. K. Mehta chapter no.5 51. A PN junction is said to be forward biased when a. Positive terminal of the battery is connected to P-side and the negative side to the N-side b. Junction is earthed c. N-side is connected directly to the p-side d. Positive terminal of the battery is connected to N-side and the negative side to the P-side Principal of electronics V. K. Mehta chapter no.5 52. The maximum efficiency of full wave rectification is a. 40.6% b. 100% c. 81.2% d. 85.6%  CARVER TRAINING AND SERVICE PVT LTD Principal of electronics V. K. Mehta Page no.102 53. The maximum efficiency of bridge wave rectification is a. 40.6% b. 100% c. 81.2% d. 85.6% Principal of electronics V. K. Mehta Page no.102 54. The maximum efficiency of half wave rectification is a. 40.6% b. 100% c. 81.2% d. 85.6% Principal of electronics V. K. Mehta Page no.102 55. The number of diode in half wave rectifier is a. 1 b. 2 c. 3 d. 4 Principal of electronics V. K. Mehta Page no.102 56. The number of diode in full wave rectifier is a. 1 b. 2 c. 3 d. 4 Principal of electronics V. K. Mehta Page no.102  CARVER TRAINING AND SERVICE PVT LTD 57. The number of diode in bridge wave rectifier is a. 1 b. 2 c. 3 d. 4 Principal of electronics V. K. Mehta Page no.102 58. The output frequency of half wave rectifier is ………………….(fin=input frequency) a. fin b. 2fin c. 3 fin d. 4 fin Principal of electronics V. K. Mehta Page no.102 59. The output frequency of full wave rectifier is ………………….(fin=input frequency) a. fin b. 2fin c. 3 fin d. 4 fin Principal of electronics V. K. Mehta Page no.102 60. The output frequency of bridge wave rectifier is ………………….(fin=input frequency) a. fin  CARVER TRAINING AND SERVICE PVT LTD b. 2fin c. 3 fin d. 4 fin Principal of electronics V. K. Mehta Page no.102 61. In half wave rectifier peak inverse voltage is ………….. a. Vm b. 2Vm c. 3Vm d. 4Vm Principal of electronics V. K. Mehta Page no.102 62. In full wave rectifier peak inverse voltage is ………….. a. Vm b. 2Vm c. 3Vm d. 4Vm Principal of electronics V. K. Mehta Page no.102 63. In bridge wave rectifier peak inverse voltage is ………….. a. Vm b. 2Vm c. 3Vm d. 4Vm Principal of electronics V. K. Mehta Page no.102 64. The ripple factor of a bridge rectifier is a. 0.482  CARVER TRAINING AND SERVICE PVT LTD b. 0.812 c. 1.11 d. 1.21 Principal of electronics V. K. Mehta Page no.102 65. The ripple factor of a full wave rectifier is a. 0.482 b. 0.812 c. 1.11 d. 1.21 Principal of electronics V. K. Mehta Page no.102 66. The ripple factor of a half wave rectifier is a. 0.482 b. 0.812 c. 1.11 d. 1.21 Principal of electronics V. K. Mehta Page no.102 67. A …………….. clipper is that which removes the positive half-cycles of the input voltage. a. Positive b. Negative c. Both positive and negative d. Combination clipper Principal of electronics V. K. Mehta Page no.487 68. A …………….. clipper is that which removes the negative half-cycles of the input voltage.  CARVER TRAINING AND SERVICE PVT LTD a. Positive b. Negative c. Both positive and negative d. Combination clipper Principal of electronics V. K. Mehta Page no.487 69. A …………….. clipper is that which removes the some part of positive half-cycles of the input voltage. a. Positive biased clipper b. Negative biased clipper c. Both positive and negative d. Combination clipper Principal of electronics V. K. Mehta Page no.487 70. A …………….. clipper is that which removes the some part of negative half-cycles of the input voltage. a. Positive biased clipper b. Negative biased clipper c. Both positive and negative d. Combination clipper Principal of electronics V. K. Mehta Page no.487 71. A …………….. clipper is that which removes the some part of positive and negative half-cycles of the input voltage. a. Positive biased clipper b. Negative biased clipper c. Combination positive and negative biased d. Clamper  CARVER TRAINING AND SERVICE PVT LTD Principal of electronics V. K. Mehta Page no.487 72. Addition of another diode capacitor section to half wave voltage doublers creates a…………. a. voltage doublers b. voltage Tripler c. voltage quadruple d. voltage regulator Principal of electronics V. K. Mehta Page no.107 73. what is long form of LED a. light emitting diode b. light emitting display c. light emitting detector d. low emitting diode Principal of electronics V. K. Mehta Page no.126 74. LED is made of …………….. a. Silicon b. Germanium c. gallium arsenide d. both a & b Principal of electronics V. K. Mehta Page no.126  CARVER TRAINING AND SERVICE PVT LTD 75. Red LED is made of ……….. a. gallium arsenide b. gallium phosphide c. gallium arsenide phosphide d. both b & c Principal of electronics V. K. Mehta Page no.126 76. Green LED is made of ……….. a. gallium arsenide b. gallium phosphide c. gallium arsenide phosphide d. both a & c Principal of electronics V. K. Mehta Page no.126 77. Yellow LED is made of ……….. a. gallium arsenide b. gallium phosphide c. gallium arsenide phosphide d. both b & a Principal of electronics V. K. Mehta Page no.126 78. In LED , When recombination OF holes and electron takes place, the recombining electrons release energy in the form of …………………. a. heat and light b. gas c. electricity d. both b & c Principal of electronics V. K. Mehta Page no.126  CARVER TRAINING AND SERVICE PVT LTD 79. As forward current of LED increase, light emission of LED a. will increase b. will decrease c. become zero d. become infinite Principal of electronics V. K. Mehta Page no.126 80. In photodiode, when there is no incident light, the reverse current is almost negligible and is called a. Zener current b. dark current c. photo current d. PIN current Principal of electronics V. K. Mehta Page no.131 81. Photodiode always works in ……………. a. Forward biased b. Reverse biased c. Both a & b d. Only forward biased Principal of electronics V. K. Mehta Page no.131 82. Greater the intensity of light falling on the PN junction of photo-diode, the …………………will be the reverse current.  CARVER TRAINING AND SERVICE PVT LTD a. Greater b. Lesser c. Average d. Both b & c Principal of electronics V. K. Mehta Page no.131 83. The capacitance of a varactor diode increases when reverse voltage across it a. decreases b. increases c. breaks down d. stores charge Principal of electronics V. K. Mehta Page no.136 84. The varactor is usually a. forward-biased b. reverse-biased c. unbiased d. in the breakdown region Principal of electronics V. K. Mehta Page no.136 85. To display the digit 8 in a seven-segment indicator a. C must be lighted b. G must be off c. F must be on d. All segments must be lighted Principal of electronics V. K. Mehta Page no.129  CARVER TRAINING AND SERVICE PVT LTD 86. To display the digit 0 in a seven segment display a. A must be lighted b. F must be off c. G must be on d. all segments except G should be lighted\ Principal of electronics V. K. Mehta Page no.129 87. A zener diode has........ a. one pn junction b. two pn junctions c. three pn junctions d. none of the above Principal of electronics V. K. Mehta Page no.448 88. A zener diode is used as........ a. an amplifier b. a voltage regulator c. a rectifier d. a multivibrator Principal of electronics V. K. Mehta Page no.448 89. The doping level in a zener diode is........that of a crystal diode. a. the same as b. less than c. more than d. none of the above Principal of electronics V. K. Mehta Page no.448  CARVER TRAINING AND SERVICE PVT LTD 90. A zener diode is always.......... connected. a. reverse b. forward c. either reverse or forward d. none of the above Principal of electronics V. K. Mehta Page no.448 91. A zener diode utilises........ characteristic for its operation. a. forward b. reverse c. both forward and reverse d. none of the above Principal of electronics V. K. Mehta Page no.448 92. In the breakdown region, a zener diode behaves like a......... source. a. constant voltage b. constant current c. constant resistance d. none of the above Principal of electronics V. K. Mehta Page no.448 93. A zener diode is destroyed if it........ a. is forward biased b. is reverse biased c. carries more than rated current  CARVER TRAINING AND SERVICE PVT LTD d. none of the above Principal of electronics V. K. Mehta Page no.448 94. A series resistance is connected in the zener circuit to........ a. properly reverse bias the zener b. protect the zener c. properly forward bias the zener d. none of the above Principal of electronics V. K. Mehta Page no.448 95. A zener diode is........ device. a. a non-linear b. a linear c. an amplifying d. none of the above Principal of electronics V. K. Mehta Page no.448 96. A zener diode has........ breakdown voltage. a. undefined b. sharp c. zero d. none of the above Principal of electronics V. K. Mehta Page no.448 97. An SCR has............... pn junctions. a. two b. three  CARVER TRAINING AND SERVICE PVT LTD c. four d. none of the above Principal of electronics V. K. Mehta Page no.555 98. An SCR has............... semiconductor layers. a. two b. three c. four d. none of the above Principal of electronics V. K. Mehta Page no.448 99. An SCR has three terminals viz................ a. cathode, anode, gate b. anode, cathode, grid c. anode, cathode, drain d. none of the above Principal of electronics V. K. Mehta Page no.448 100. An SCR behaves as a............... switch. a. Unidirectional b. Bidirectional c. Mechanical d. none of the above Principal of electronics V. K. Mehta Page no.448 101. An SCR is sometimes called...............  CARVER TRAINING AND SERVICE PVT LTD a. triac b. diac c. unijunction transistor d. thyristor Principal of electronics V. K. Mehta Page no.448 102. An SCR is made of............... a. germanium b. silicon c. carbon d. none of the above Principal of electronics V. K. Mehta Page no.448 103. In the normal operation of an SCR, anode is............... w.r.t. cathode. a. at zero potential b. negative c. positive d. none of the above Principal of electronics V. K. Mehta Page no.448 104. In normal operation of an SCR, gate is............... w.r.t. cathode. a. positive b. negative c. at zero potential d. none of the above Principal of electronics V. K. Mehta Page no.448 105. An SCR combines the features of...............  CARVER TRAINING AND SERVICE PVT LTD a. a rectifier and resistance b. a rectifier and transistor c. a rectifier and capacitor d. none of the above Principal of electronics V. K. Mehta Page no.448 106. The control element in an SCR is............... a. cathode b. anode c. anode supply d. gate Principal of electronics V. K. Mehta Page no.448 107. The normal way to turn on an SCR is by............... a. breakover voltage b. appropriate anode current c. appropriate gate current d. none of the above Principal of electronics V. K. Mehta Page no.448 108. An SCR is turned off by............... a. reducing anode voltage to zero b. reducing gate voltage to zero c. reverse biasing the gate d. none of the above Principal of electronics V. K. Mehta Page no.448 109. An SCR is a............... triggered device.  CARVER TRAINING AND SERVICE PVT LTD a. voltage b. current c. voltage as well as current d. none of the above Principal of electronics V. K. Mehta Page no.448 110. In an SCR circuit, the supply voltage is generally............... that of breakover voltage. a. equal to b. less than c. greater than d. none of the above Principal of electronics V. K. Mehta Page no.448 111. An SCR is made of silicon and not germanium because silicon............... a. is inexpensive b. is mechanically strong c. has small leakage current d. is tetravalent Principal of electronics V. K. Mehta Page no.448 112. An SCR is turned off when............... a. anode current is reduced to zero b. gate voltage is reduced to zero c. gate is reverse biased d. none of the above Principal of electronics V. K. Mehta Page no.448  CARVER TRAINING AND SERVICE PVT LTD 113. When SCR is OFF, the current in the circuit is............... a. exactly zero b. small leakage current c. large leakage current d. none of the above Principal of electronics V. K. Mehta Page no.448 114. When SCR starts conducting, then...............loses all control. a. gate b. cathode c. anode d. none of the above Principal of electronics V. K. Mehta Page no.448 4.1.2. Semiconductors - Transistor. 115. A transistor has........ a. One pn junction b. Two pn junctions c. Three pn junctions d. Four pn junctions Principal of electronics V. K. Mehta Page no.142 116. The number of depletion layers in a transistor is........ a. four  CARVER TRAINING AND SERVICE PVT LTD b. three c. one d. two Principal of electronics V. K. Mehta Page no.142 117. The base of a transistor is....... doped. a. heavily b. moderately c. lightly d. none of the above Principal of electronics V. K. Mehta Page no.142 118. The element that has the biggest size in a transistor is........ a. collector b. base c. emitter d. collector-base junction Principal of electronics V. K. Mehta Page no.143 119. In a pnp transistor, the current carriers are........ a. acceptor ions b. donor ions c. free electrons d. holes Principal of electronics V. K. Mehta Page no.143 120. The collector of a transistor is........ doped. a. heavily b. moderately  CARVER TRAINING AND SERVICE PVT LTD c. lightly d. none of the above Principal of electronics V. K. Mehta Page no.143 121. A transistor is a......... operated device. a. current b. voltage c. both voltage and current d. none of the above Principal of electronics V. K. Mehta Page no.143 122. In an npn transistor,....... are the minority carriers. a. free electrons b. holes c. donor ions d. acceptor ions Principal of electronics V. K. Mehta Page no.143 123. The emitter of a transistor is........ doped. a. lightly b. heavily c. moderately d. none of the above Principal of electronics V. K. Mehta Page no.143 124. In a transistor, the base current is about........of emitter current. a. 25% b. 20% c. 35% d. 5% Principal of electronics V. K. Mehta Page no.146 125. At the base-emitter junction of a transistor, one finds........  CARVER TRAINING AND SERVICE PVT LTD a. reverse bias b. a wide depletion layer c. low resistance d. none of the above Principal of electronics V. K. Mehta Page no.146 126. At the base-collector junction of a transistor, one finds........ a. reverse bias b. a wide depletion layer c. High resistance d. none of the above Principal of electronics V. K. Mehta Page no.146 127. The input impedance of a transistor is...... a. high b. low c. very high d. almost zero Principal of electronics V. K. Mehta Page no.146 128. Most of the majority carriers from the emitter......... a. recombine in the base b. recombine in the emitter c. pass through the base region to the collector d. none of the above Principal of electronics V. K. Mehta Page no.146 129. The current IB is........  CARVER TRAINING AND SERVICE PVT LTD a. electron current b. hole current c. donor ion current d. acceptor ion current Principal of electronics V. K. Mehta Page no.146 130. In a transistor,........ a. IC = IE + IB b. IB = IC + IE c. IE = IC * IB d. IE = IC + IB Principal of electronics V. K. Mehta Page no.148 131. The value of α of a transistor is........ a. more than 1 b. less than 1 c. 1 d. none of the above Principal of electronics V. K. Mehta Page no.153 132. The output impedance of a transistor is........ a. high b. zero c. low d. very low Principal of electronics V. K. Mehta Page no.153 133. The most commonly used transistor arrangement is........ arrangement.  CARVER TRAINING AND SERVICE PVT LTD a. common emitter b. common base c. common collector d. none of the above Principal of electronics V. K. Mehta Page no.163 134. The input impedance of a transistor connected in.......... arrangement is the highest. a. common emitter b. common collector c. common base d. none of the above Principal of electronics V. K. Mehta Page no.162 135. The output impedance of a transistor connected in......... arrangement is the highest. a. common emitter b. common collector c. common base d. none of the above Principal of electronics V. K. Mehta Page no.148 136. The phase difference between the input and output voltages in a common base arrangement is......... a. 180º b. 90º c. 270º d. 0º Principal of electronics V. K. Mehta Page no.163 137. The voltage gain of a transistor connected in........ arrangement is the highest.  CARVER TRAINING AND SERVICE PVT LTD a. common base b. common collector c. common emitter d. none of the above Principal of electronics V. K. Mehta Page no.153 138. As the temperature of a transistor goes up, the base-emitter resistance........ a. decreases b. increases c. remains the same d. none of the above Principal of electronics V. K. Mehta Page no.163 139. The voltage gain of a transistor connected in common collector arrangement is....... a. equal to 1 b. more than 10 c. more than 100 d. less than 1 Principal of electronics V. K. Mehta Page no.162 140. The phase difference between the input and output voltages of a transistor connected in common collector arrangement is........ a. 180º b. 0º c. 90º d. 270º Principal of electronics V. K. Mehta Page no.163  CARVER TRAINING AND SERVICE PVT LTD 141. BC 147 transistor indicates that it is made of........ a. germanium b. silicon c. carbon d. none of the above Principal of electronics V. K. Mehta Page no.188 142. In a transistor, signal is transferred from a........ circuit. a. high resistance to low resistance b. low resistance to high resistance c. high resistance to high resistance d. low resistance to low resistance Principal of electronics V. K. Mehta chapter no.8 143. The arrow in the symbol of a transistor indicates the direction of......... a. electron current in the emitter b. electron current in the collector c. hole current in the emitter d. donor ion current Principal of electronics V. K. Mehta Page no.146 144. The leakage current in CE arrangement is....... that in CB arrangement. a. more than b. less than c. the same as  CARVER TRAINING AND SERVICE PVT LTD d. none of the above Principal of electronics V. K. Mehta page no.163 145. A heat sink is generally used with a transistor to........ a. increase the forward current b. decrease the forward current c. compensate for excessive doping d. prevent excessive temperature rise Principal of electronics V. K. Mehta chapter no.8 146. The most commonly used semiconductor in the manufacture of a transistor is........ a. germanium b. silicon c. carbon d. none of the above Principal of electronics V. K. Mehta chapter no.8 147. The collector-base junction in a transistor has........ a. forward bias at all times b. reverse bias at all times c. low resistance d. none of the above Principal of electronics V. K. Mehta chapter no.8 148. In an NPN transistor the P is the a. Collector b. Emitter c. Base  CARVER TRAINING AND SERVICE PVT LTD d. Gate Principal of electronics V. K. Mehta chapter no.8 149. What is resistor R used for? a. Amplification b. Bias c. Stabilization d. None of these Principal of electronics V. K. Mehta chapter no.8 150. When a positive voltage is applied to the base of a normally biased n-p-n common emitter amplifier. a. the collector voltage goes less positive. b. the emitter current decreases. c. the base current decreases. d. All the above Principal of electronics V. K. Mehta chapter no.8  CARVER TRAINING AND SERVICE PVT LTD 151. Which way does conventional current flow in a PNP junction?. a. Emitter to base. b. Collector to base. c. Collector to emitter. Principal of electronics V. K. Mehta chapter no.8 152. For conduction of a transistor, the emitter junction is. a. forward or reverse as appropriate to the input signal. b. reverse biased. c. forward biased. Aircraft Electricity and Electronics 5th Edition Eismin Page 116. 153. In a PNP transistor, which way does conventional current flow?. a) Base to emitter. b) Collector to emitter. c) Emitter to collector. 154. In a PNP transistor, conventional current will flow when. a. The emitter is more positive than the base. b. the base is more positive than the emitter. c. the collector is more positive than the emitter. Principal of electronics V. K. Mehta chapter no.8 155. In a common collector circuit the output and input are. a. in phase. b. out of phase by 60°. c. out of phase by 90°. Principal of electronics V. K. Mehta chapter no.8  CARVER TRAINING AND SERVICE PVT LTD 156. An NPN transistor to conduct the collector circuit has to be. a. more positive than the base. b. less positive than the emitter. c. more positive than the emitter. Aircraft Electricity and Electronics 5th Edition Eismin Page 116. 157. Point X compared to point. a. Y is more negative. b. Z is more positive. c. Z is more negative. Aircraft Electricity and Electronics 5th Edition Eismin Page 116/117. 158. Resistance measured using an AVO between the Collector and Emitter of a transistor is. a. smaller Collector to Emitter. b. same both ways. c. higher Collector to Emitter. Aircraft Electricity and Electronics 5th Edition Eismin Page 119. 159. A transistor is used in. a. current amplifiers. b. both current amplifiers and voltage amplifiers. c. voltage amplifiers. Principal of electronics V. K. Mehta chapter no.8 160. Under normal operating conditions X will be.  CARVER TRAINING AND SERVICE PVT LTD a. negative with respect to Z. b. positive with respect to Z. c. negative with respect to Y.. Aircraft Electricity and Electronics 5th Edition Eismin Page 116/117. 161. In which direction does the current flow on a PNP transistor when forward biased?. a. Emitter to base. b. Emitter to collector. c. Collector to emitter. Principal of electronics V. K. Mehta chapter no.8 162. With an NPN transistor electrons leave the. a. Base. b. Collector. c. Emitter. Principal of electronics V. K. Mehta chapter no.8 163. In a transistor, the arrow always points in the direction of. a. electron flow. b. conventional current. c. emitter. Principal of electronics V. K. Mehta chapter no.8  CARVER TRAINING AND SERVICE PVT LTD 164. In an NPN transistor the. a. collector is more positive than the base. b. collector is the same as the base. c. emitter is more positive than the base. Principal of electronics V. K. Mehta chapter no.8 165. If light entering a photo transistor decreases, the current to the collector. a. decreases. b. remains the same. c. increases. Principal of electronics V. K. Mehta chapter no.- 8 166. A silicon bi-polar transistor with two depletion zones. a. operates by varying electric fields. b. is a voltage operated device. c. consists of 3 slices of semiconductor material. Principal of electronics V. K. Mehta Page no.-143 167. "To decrease the voltage gain of a common emitter amplifier you would increase the resistance in the. a. base circuit. b. emitter circuit. c. collector circuit. Principal of electronics V. K. Mehta Page no.-163 168. The current I/P and O/P waveforms in a common emitter amplifier are. a. Out of phase. b. In phase. c. 90° out of phase.  CARVER TRAINING AND SERVICE PVT LTD Principal of electronics V. K. Mehta Page no.-161 169. How is the amplifier in the diagram shown wired?. a. Common base. b. Common emitter. c. Common collector. Principal of electronics V. K. Mehta Page no.-161 170. Which mode of operation provides the best high frequency response? a. Emitter. b. Base. c. Collector. Principal of electronics V. K. Mehta Page no.-163 171. A FET when compared to a junction transistor is. a. low impedance. b. current operated. c. high impedance. Principal of electronics V. K. Mehta chapter no.-8 172. One characteristic of the emitter follower is. a. low resistance output. b. low current amplification. c. high voltage amplification. Principal of electronics V. K. Mehta Page no.-162  CARVER TRAINING AND SERVICE PVT LTD 173. An amplifier current gain will be slightly less than 1, but its voltage gain will be high, if it is connected in the. a. common base configuration. b. common emitter configuration. c. common collector configuration. Principal of electronics V. K. Mehta Page no.-163 174. The common collector amplifier is sometimes called the emitter follower circuit because. a. The emitter voltage follows the collector voltage. b. the emitter current follows the collector current. c. the emitter voltage follows the base voltage. Principal of electronics V. K. Mehta Page no.-162 175. Amplifiers may be classified as. a. Voltage amplifiers or power amplifiers. b. voltage amplifiers or impedance amplifiers. c. common emitter or common collector amplifiers. Principal of electronics V. K. Mehta Page no.-143 176. An amplifier can provide both voltage gain and current gain when it is connected in the. a. Common collector configuration. b. Common emitter configuration. c. Common base configuration Principal of electronics V. K. Mehta Page no.-160 177. The most commonly used semiconductor material is a. Silicon b. Germanium c. Mixture of silicon & germanium d. None of these Principal of electronics V. K. Mehta Page no.-143  CARVER TRAINING AND SERVICE PVT LTD 178. In an n-p-n transistor, the majority carriers in the base are a. Electron b. Holes c. Both electron and hole d. Either electron or hole Principal of electronics V. K. Mehta Page no.-145 179. A Transistor has a. One P-N Junction b. Two P-N Junction c. Three P-N Junction d. Four P-N Junction Principal of electronics V. K. Mehta Page no.-142 180. The number of depletion layer in a Transistor is a. 1 b. 2 c. 3 d. 4 Principal of electronics V. K. Mehta Page no.-142 181. The base of the Transistor is ……………. Doped a. Heavily b. Lightly c. Moderately d. None of the above Principal of electronics V. K. Mehta Page no.-142  CARVER TRAINING AND SERVICE PVT LTD 182. The element that has biggest size in a transistor is a. Collector b. Emitter c. Base d. Emitter- Base junction Principal of electronics V. K. Mehta Page no.-142 183. In a PNP transistor, the current carriers are a. Acceptor Ions b. Donar ions c. Free electrons d. Holes Principal of electronics V. K. Mehta Page no.-143 184. The Collector of the Transistor is ……………. Doped a. Heavily b. Lightly c. Moderately d. None of the above Principal of electronics V. K. Mehta Page no.-142 185. The Emitter of the Transistor is ……………. Doped a. Heavily b. Lightly c. Moderately d. None of the above Principal of electronics V. K. Mehta Page no.-142 186. A transistor is a ………….. operated device. a. Current b. Voltage c. Both Current and Voltage  CARVER TRAINING AND SERVICE PVT LTD d. Non of the above Principal of electronics V. K. Mehta Page no.-142 187. In a NPN transistor…….are minority carriers a. Free electrons b. Holes c. Acceptor Ions d. Donar ions Ans – Holes Principal of electronics V. K. Mehta Page no.-143 188. In a transistor, the base current is about …………. Of emitter current a.. 25% b.. 20% c.. 50% d.. 5% Principal of electronics V. K. Mehta Page no.-145 189. At the Base-emitter junction of a transistor is a. Reverse Biased b. A wide depletion layer c. Low resistance d. None of the above Principal of electronics V. K. Mehta Page no.-143 190. The input impedance of the transistor is ……….. a. High b. Low c. Very high d. Almost Zero Principal of electronics V. K. Mehta Page no.-142 191. In a transistor……………. a. IE = Ic- IB b. Ic = IE + IB  CARVER TRAINING AND SERVICE PVT LTD c. IB= Ic + IE d. IE = Ic+ IB Principal of electronics V. K. Mehta Page no.-145 192. The value of Alpha of a transistor is ………… a. > 1 b. < 1 c. = 1 d. none of the above Principal of electronics V. K. Mehta Page no.-149 193. The value of β of a transistor is ………… a. > 1 b. < 1 c. = 1 d. Between 20 and 500 Principal of electronics V. K. Mehta Page no.-163 194. The output impedance of a transistor is …………… a. High b. Low c. zero d. Very Low Principal of electronics V. K. Mehta Page no.-163 195. The relation between  and β is a. =/1- b.  c. - d. + Principal of electronics V. K. Mehta Page no.-163 196. The most commonly used transistor Configuration is  CARVER TRAINING AND SERVICE PVT LTD a. CCC b. CEC c. CBC d. None of the above Principal of electronics V. K. Mehta Page no.-163 197. The voltage gain of a transistor connected in CCC is a. Equal to 1 b. More than 10 c. More than 100 d. Less than 1 Principal of electronics V. K. Mehta Page no.-163 198. In a transistor, signal is transferred from a ……………. Circuit a. High resistance to Low resistance b. Low resistance to High resistance c. Low resistance to Low resistance d. High resistance to High resistance. Principal of electronics V. K. Mehta Page no.-143 199. The Arrow in the symbol of a transistor indicates the direction of …………… a. Electron current in the emitter b. Electron current in the Collector c. Hole current in the emitter d. None of the above Principal of electronics V. K. Mehta Page no.-146 200. The leakage current in CE configuration is ……. That in CB arrangement a. More than b. Less than c. The same as  CARVER TRAINING AND SERVICE PVT LTD d. None of the above Principal of electronics V. K. Mehta Page no.-157 201. The most commonly used Semi-conductor material for the manufacture of a transistor is a. Ge b. Si c. Cu d. None of the above Principal of electronics V. K. Mehta Page no.-141 202. The collector – Base junction in a transistor has a. F.W.B at all times b. R.V.B at all times c. Low resistance d. None of the above Principal of electronics V. K. Mehta Page no.-143 203. Transistor biasing represents ………….. Conditions. a. AC b. DC c. Both AC and DC d. None of the above Principal of electronics V. K. Mehta Page no.-143 204. Transistor biasing is done to keep ………… in the circuit a. Proper direct current b. Proper AC c. The base current Small d. Collector current Small. Principal of electronics V. K. Mehta Page no.-143 205. Operating point represents …………….. a. Values of IC and VCE when signal is applied b. The magnitude of the signal  CARVER TRAINING AND SERVICE PVT LTD c. Zero signal values of IC and VCE d. None of the above Principal of electronics V. K. Mehta Page no.-167 206. Improper biasing of a Transistor circuit leads to a. excessive heat production at collector terminal b. distortion in output signal c. Faulty location load line d. Heavy loading emitter terminal Principal of electronics V. K. Mehta Page no.-167 207. The universal bias stabilization circuit is most popular because a. Ic does not depend on the transistor characteristics b. Its Beeta instability is high c. Voltage divider is heavily loaded by transistor base d. Ic = Ie Ans - Ic does not depend on the transistor characteristics Principal of electronics V. K. Mehta Page no.-197 208. Transistor Biasing is generally provided by a ……………. a. Biasing circuit b. Bias battery c. diode d. None of the above Principal of electronics V. K. Mehta Page no.-195 209. For proper operation of the transistor , its collector should have a. FWB b. RVB c. Very Small size  CARVER TRAINING AND SERVICE PVT LTD d. None of the above Principal of electronics V. K. Mehta Page no.-141 210. The circuit that provides the best stabilization of operating point is ……. a. Base Resistor bias b. Collector feedback bias c. Voltage Divider or Potential Divider Bias d. None of the above. Principal of electronics V. K. Mehta Page no.-212 211. The point of intersection of the DC and AC load line represents…………… a. Operating point b. Current gain c. Voltage Gain d. None of the above Principal of electronics V. K. Mehta Page no.-205 212. An ideal value of stability factor is ………………. a. 100 b. 200 c. More than 200 d. 1 Principal of electronics V. K. Mehta Page no.-156 213. The disadvantage of Base resistor method of transistor biasing is that it……. a. is complicated b. is sensitive to changes in β c. Provides high stability d. None of the above. Principal of electronics V. K. Mehta Page no.-156 214. The operating point is also called the ……………. a. Cut off point b. Quiescent point  CARVER TRAINING AND SERVICE PVT LTD c. The maximum current point d. None of the above. Principal of electronics V. K. Mehta Page no.-201 215. For proper amplification by a transistor circuit, the operating point should be located at ………. Of the DC load line. a. The end point b. Middle point c. The maximum current point d. None of the above. Principal of electronics V. K. Mehta Page no.-205 216. The disadvantage of Voltage Divider Bias is that it has …… a. High stability factor b. Low base Current c. Many resistors d. None of the above. Principal of electronics V. K. Mehta Page no.-221 217. Thermal runway occurs when ……………. a. Collector is RVB b. Transistor is not biased c. Emitter is FWB d. Junction Capacitance is high. Principal of electronics V. K. Mehta Page no.-222 218. The purpose of resistance in the emitter circuit of a transistor amplifier is to …… a. Limit the maximum IE b. Provide base- emitter bias c. Limit the change in the IE d. None of the above. Principal of electronics V. K. Mehta Page no.-141 219. In a transistor amplifier circuit , VCE = VCB + …….  CARVER TRAINING AND SERVICE PVT LTD a. VBE b. 2VBE c. 1.5 VBE d. None of the above. Principal of electronics V. K. Mehta Page no.-148 220. The base resistor circuit is generally used in a. Amplifier circuit b. Switching circuit c. Rectifier circuit d. None of the above. Principal of electronics V. K. Mehta Page no.-141 221. The value of S factor of a collector feedback bias circuit is ………… that of base resistor bias. a. The same as b. More than c. Less than d. None of the above Principal of electronics V. K. Mehta Page no.-217 222. The value of S factor of Base resistor bias is. a. 1  b). b.   + 1 c. None of the above d.  Principal of electronics V. K. Mehta Page no.-217 223. In the design of a biasing circuit, the value of collector load RC is determined by a. VCE consideration b. IB consideration c. VCE consideration d. None of the above Principal of electronics V. K. Mehta Page no.-195  CARVER TRAINING AND SERVICE PVT LTD 224. If the value of the IC increases the value of the VCE……. a. remains same b. Decreases c. Increases d. None of the above Principal of electronics V. K. Mehta Page no.-174 225. If the value of the Temperature increases the value of the VBE……. a. remains same b. Decrease c. Increases d. None of the above Principal of electronics V. K. Mehta Page no.-172 226. The stabilization of operating point in potential divider method is provided by …. a. RE Consideration b. RC Consideration c. VCC Consideration d. None of the above Principal of electronics V. K. Mehta Page no.- 215 227. When the temperature changes , the operating point is shifted due to …….. a. Changes in ICBO b. Changes in Vcc c. Change in the value of circuit resistances d. None of the above Principal of electronics V. K. Mehta Page no.-157 228. In an NPN transistor the P is the a. Collector  CARVER TRAINING AND SERVICE PVT LTD b. Base c. Emitter Principal of electronics V. K. Mehta Page no.-141 229. For correct operation of a transistor, the following conditions must apply a. The base-emitter junction must be forward biased and the base-collector junction must be greater than 0.7 volts. b. For an NPN transistor the base-emitter junction must be forward biased and for a PNP transistor the base emitter junction must be reverse biased. c. The base-collector junction must be reverse biased and the base-emitter junction must be forward biased. Principal of electronics V. K. Mehta Page no.-143 230. Which way does conventional current flow in a PNP junction? a. Emitter to base b. Collector to base c. Emitter to Collector d. None of these Principal of electronics V. K. Mehta Page no.-148 231. In an NPN transistor the a. emitter is more positive than the base b. collector is more positive than the emitter c. emitter is more positive than the collector Principal of electronics V. K. Mehta Page no.-143  CARVER TRAINING AND SERVICE PVT LTD 232. How is the amplifier in the diagram shown wired? a. Common base b. Common emitter c. Common collector Principal of electronics V. K. Mehta Page no.-163 233. The common collector amplifier is sometimes called the emitter follower circuit because. a. the emitter voltage follows the collector voltage. b. the emitter current follows the collector current. c. the emitter voltage follows the base voltage Principal of electronics V. K. Mehta Page no.-162 234. A transistor is said to be in the quiescent state when.  CARVER TRAINING AND SERVICE PVT LTD a. no currents are flowing. b. it is unbiased. c. no signal is applied to the input. Principal of electronics V. K. Mehta Page no.-167 235. An advantage of a common emitter is. a. It has high power gain b. It is a voltage follower c. It has high voltage gain Principal of electronics V. K. Mehta Page no.-163 236. A transistor at saturation has a. low resistance b. zero resistance c. high resistance Principal of electronics V. K. Mehta Page no.-174  CARVER TRAINING AND SERVICE PVT LTD 237. Thermal runaway in a transistor refers to a. high current flow when temperature decreases b. low current flow when temperature increases c. high current flow when temperature increases Principal of electronics V. K. Mehta Page no.-175 238. A Common Collector circuit has the following characteristics a. Medium Voltage Gain, High Current Gain, Non-Inverted Output b. Low Voltage Gain, High Current Gain, Inverted Output c. Medium Voltage Gain, Low Current Gain, Inverted Output Principal of electronics V. K. Mehta Page no.-143 239. A transistor in Common Emitter mode gives. a. high voltage gain only. b. high current gain only c. high power gain  CARVER TRAINING AND SERVICE PVT LTD Principal of electronics V. K. Mehta Page no.-163 4.1.3. Semiconductors – Integrated circuit. 240. An IC has …………….. size a. Very large b. Large c. Extremely small d. None of the above Principal of electronics V. K. Mehta Page no.-628 241. ICs are generally made of ……………… a. Silicon b. Germanium c. Copper d. None of the above Principal of electronics V. K. Mehta Page no.-628 242. ……………… ICs are the most commonly used a. Thin films b. Monolithic c. Hybrid d. None of the above Principal of electronics V. K. Mehta Page no.-629  CARVER TRAINING AND SERVICE PVT LTD 243. The most popular form of IC package is …………….. a. DIL b. Flatpack c. TO-5 d. None of the above Principal of electronics V. K. Mehta Page no.-631 244. ……………. cannot be fabricated on an IC a. Transistors b. Diodes c. Resistors d. Large inductors and transformers Principal of electronics V. K. Mehta Page no.-633 245. An audio amplifier is an example of ……………… a. Digital IC b. Linear IC c. Both digital and linear IC d. None of the above Principal of electronics V. K. Mehta Page no.-636 246. The active components in an IC are …………. a. Resistors b. Capacitors  CARVER TRAINING AND SERVICE PVT LTD c. Transistors and diodes d. None of the above Principal of electronics V. K. Mehta Page no.-633 247. We use ……………….. ICs in computers a. Digital b. Linear c. Both digital and linear d. None of the above Principal of electronics V. K. Mehta Page no.-636 248. The SiO2 layer in an IC acts as …………. a. A resistor b. An insulating layer c. Mechanical output d. None of the above Principal of electronics V. K. Mehta Page no.-630 249. ICs are used in …………… a. Linear devices only b. Digital devices only c. Both linear and digital devices d. None of the above Principal of electronics V. K. Mehta Page no.-630  CARVER TRAINING AND SERVICE PVT LTD 250. A transistor takes …………… inductor on a silicon IC chip a. Less space than b. More space than c. Same space as d. None of the above Principal of electronics V. K. Mehta Page no.-631 251. The most popular types of ICs are ………….. a. Thin-film b. Hybrid c. Thick-film d. Monolithic Principal of electronics V. K. Mehta Page no.-633 252. Digital ICs process ……………. a. Linear signals only b. Digital signals only c. Both digital and linear signals d. None of the above Principal of electronics V. K. Mehta Page no.-633 253. Operational amplifiers use ………….. a. Linear ICs b. Digital ICs c. Both linear and digital ICs d. None of the above Principal of electronics V. K. Mehta Page no.-687  CARVER TRAINING AND SERVICE PVT LTD 254. Which of the following is most difficult to fabricate in an IC? a. Diode b. Transistor c. FET d. Capacitor Principal of electronics V. K. Mehta Page no.-633 255. An IC has................. size. a. very large b. large c. extremely small d. none of the above Principal of electronics V. K. Mehta Page no.-636 256. ICs are generally made of................. 636 a. silicon b. germanium c. copper d. none of the above Principal of electronics V. K. Mehta Page no.-636 257............... ICs are the most commonly used. a. thin film b. monolithic  CARVER TRAINING AND SERVICE PVT LTD c. hybrid d. none of the above Principal of electronics V. K. Mehta Page no.-636 258. The most popular form of IC package is................. a. DIL b. Flatpack c. TO-5 d. none of the above Principal of electronics V. K. Mehta Page no.-636 259................... cannot be fabricated on an IC. a. transistors b. diodes c. resistors d. large inductors and transformers Principal of electronics V. K. Mehta Page no.-635 260. An audio amplifier is an example of.............. a. digital IC b. linear IC c. both digitial and linear IC d. none of the above Principal of electronics V. K. Mehta Page no.-636 261. The active components in an IC are.............  CARVER TRAINING AND SERVICE PVT LTD a. Resistors b. Capacitors c. transistors and diodes d. none of the above Principal of electronics V. K. Mehta Page no.-636 262. We use................. ICs in computers. a. digital b. linear c. both digital and linear d. none of the above Principal of electronics V. K. Mehta Page no.-634 263. The SiO2 layer in an IC acts as................. a. a resistor b. an insulating layer c. mechanical output d. none of the above Principal of electronics V. K. Mehta Page no.-630 264. ICs are used in................. a. linear devices only b. digital devices only c. both linear and digital devices  CARVER TRAINING AND SERVICE PVT LTD d. none of the above Principal of electronics V. K. Mehta Page no.-630 265. A transistor takes................. inductor on a silicon IC chip. a. less space than b. more space than c. same space as d. none of the above Principal of electronics V. K. Mehta Page no.-632 266. The most popular types of ICs are................. a. thin-film b. hybrid c. thick-film d. monolithic Principal of electronics V. K. Mehta Page no.-633 267. Digital ICs process................. a. linear signals only b. digital signals only c. both digital and linear signals d. none of the above Principal of electronics V. K. Mehta Page no.-628 268. Operational amplifiers use................. a. linear ICs  CARVER TRAINING AND SERVICE PVT LTD b. digital ICs c. both linear and digital ICs d. none of the above Principal of electronics V. K. Mehta Point no.-25.04 269. Which of the following is most difficult to fabricate in an IC ? a. diode b. transistor c. FET d. Capacitor Principal of electronics V. K. Mehta Page no.-633 270. What is the IC no. of OP-AMP a. IC 742 b. IC741 c. IC743 d. IC744 Principal of electronics V. K. Mehta Point no.-25.04 271. IDEAL Open loop gain of OP-AMP is a. Infinite b. 0  CARVER TRAINING AND SERVICE PVT LTD c. 1 Principal of electronics V. K. Mehta Point no.-25.05 272. IDEAL Input impedance of OP-AMP is a) Infinite b) 0 c) 1 d) 5 Principal of electronics S. CHAND Point No.25.05 273. IDEAL Output impedance of OP-AMP is a) Infinite b) 0 c) 1 d) 5 Principal of electronics S. CHAND Point. No.25.05 274. IDEAL Bandwidth of OP-AMP is a) Infinite b) 0  CARVER TRAINING AND SERVICE PVT LTD c) 1 d) 5 Principal of electronics S. CHAND Point No.25.05 275. The common-mode gain is a) Very high b) Very low c) Always unity d) Unpredictable Principal of electronics S. CHAND Point No.25.06 276. If ADM=3500 and ACM=0.35,CMRR is= a) 1225 b) 10000 c) 80db d) Answer and Principal of electronics S. CHAND Point No.25.06 277. What is gain formula for inverting amplifier?  CARVER TRAINING AND SERVICE PVT LTD a) –RF/R1 b) RF/R1 c) 1–RF/R1 d) 1+RF/R1 Principal of electronics S. CHAND Point No.25.07 278. What is gain formula for Non- inverting amplifier? a) –RF/R1 b) RF/R1 c) 1–RF/R1 d) 1+RF/R1 Principal of electronics S. CHAND Point No.25.07 279. In unity follower what is value of Rf a) 1 b) 0 c) 2 d) 5 Principal of electronics S. CHAND Point No.25.08 280. In unity follower what is value of Ri  CARVER TRAINING AND SERVICE PVT LTD a. infinite b. 0 c. 2 d. 5 Principal of electronics S. CHAND Point No.25.08 281. Practical Open loop gain of OP-AMP is a. Infinite b. 0 c. 1 d. 5 Principal of electronics S. CHAND Point No.25.05 282. Practical Input impedance of OP-AMP is a. 2Mohm b. 5mohm c. 1Mohm d. 5mohm Principal of electronics S. CHAND Point No.25.05  CARVER TRAINING AND SERVICE PVT LTD 283. Practical Output impedance of OP-AMP is a) Infinite b) 100 c) 1100 d) 5kohm Principal of electronics S. CHAND Point. No.25.05 284. How much supply required for op-amp is a. +15v b. 12v c. -45v d. 05v Principal of electronics S. CHAND Point No.25.04 285. What is value of V1 in virtual ground concept a. 0 b. 1 c. 5 d. 1 Principal of electronics S. CHAND Point No.25.06  CARVER TRAINING AND SERVICE PVT LTD 286. For inverting amplifier R1=1K and Rf=1M, AV= a. -1000 b. 1000 c. -1100 d. 10 Principal of electronics S. CHAND Point No.25.08 287. For non- inverting amplifier R1=1K and Rf=1M, AV= a. 1001 b. 1000 c. -1100 d. 10 Principal of electronics S. CHAND Point No.25.08 288. What is pin number of two in IC 741 a. Inverting pin b. Non inverting pin c. positive d. negative Principal of electronics S. CHAND Point No.25.08  CARVER TRAINING AND SERVICE PVT LTD 289. What is pin number of three in IC 741 a. Inverting pin b. Non inverting pin c. positive d. negative Principal of electronics S. CHAND Point No.25.08 290. What is ideal value of Bandwidth in OP-AMP is a. Infinite b. 0 c. 1 d. 5 Principal of electronics S. CHAND Point No.25.05 291. In inverting Amplifier output signal is a. In phase with input signal  CARVER TRAINING AND SERVICE PVT LTD b. Out of phase with input signal c. Equal to input signal d. All of the above Principal of electronics S. CHAND Point. No.25.07 292. In Non-inverting Amplifier output signal is a. In phase with input signal b. Out of phase with input signal c. Equal to input signal d. All of the above Principal of electronics S. CHAND Point. No.25.07 293. When a three of OP-amp stages are connected in series with voltage gain A1 , A2 & A3, the overall voltage gain is equal to a. A1+A2+A3 b. A1*A2*A3 c. A1-A2-A3 d. A1*A2+A3 Principal of electronics S. CHAND Point No.25.07 294. An OP-AMP can be classified as ……………….amplifier a. Linear  CARVER TRAINING AND SERVICE PVT LTD b. Low -rin c. Positive feedback d. RC-coupled Principal of electronics S. CHAND Point No.25.04 295. Since input resistance of an ideal op-amp is infinite a. Its output resistance is zero b. Its output voltage becomes independent of load resistance c. Its input current is zero d. It becomes a current –controlled device. Principal of electronics S. CHAND Point No.25.05 296. The gain of an op-amp is around a. 1,000,000 b. 1000 c. 100 d. 10,000 Principal of electronics S. CHAND Point. No.25.05 297. When an input voltage of 1V is applied to an op-amp having Av=106 and bias supply of +15V,the output voltage is  CARVER TRAINING AND SERVICE PVT LTD a. 15*106 V b. 106 V c. 15 uV d. 15 V Principal of electronics S. CHAND Point No.25.05 298. When in negative scalar, both R1 and Rf are reduced to zero, the circuit function is a. Integrator b. Subtraction c. comparator d. unity follower Principal of electronics S. CHAND Point. No.25.08 299. The two input of op-amp is called as a. High and low b. Positive and negative c. Inverting and Non-inverting d. Differential and Non-differential Principal of electronics S. CHAND Point No.25.05 300. The feedback path in an op-amp integrator consist of  CARVER TRAINING AND SERVICE PVT LTD a. Capacitor b. Resistance c. Inductor d. Led Principal of electronics S. CHAND Point No.25.10 301. The most popular application of op-amp integrator is a. Produce sine signal b. Produce ramp signal c. Produce cosine signal d. Produce dc signal Principal of electronics S. CHAND Point No.25.10 302. What is pin number of two in IC 741 a. Inverting pin b. Non inverting pin c. positive d. negative Principal of electronics S. CHAND Point No.25.08 303. What is pin number of three in IC 741  CARVER TRAINING AND SERVICE PVT LTD a. Inverting pin b. Non inverting pin c. positive d. negative Principal of electronics S. CHAND Point No.25.08 304. Differentiator is used to produce a rectangular wave from ___. a. Sine wave input b. Ramp input c. Both a & b d. NTA S. Principal of electronics CHAND Point No.25.06 305. The Averaging summing amplifier consist of input voltage V1 and V2 then VOUT= a. (V1+V2)/2 b. –(V1+V2)/3 c. - (V1+V2)/2 d. (V1+V2)/4 Principal of electronics S. CHAND Point. No.25.08 306. The Subtraction amplifier consist of input voltage V1 and V2 then VOUT= a. V1/V2 b. V2-V1  CARVER TRAINING AND SERVICE PVT LTD c. V1+V2 d. V1 * V2 Principal of electronics S. CHAND Point. No.25.09 307. Practical Input impedance of OP-AMP is a. 2Mohm b. 5mohm c. 1Mohm d. 5mohm Principal of electronics S. CHAND Point No.25.05 308. Practical Output impedance of OP-AMP is a. Infinite b. 100 c. 1100 d. 5kohm Principal of electronics S. CHAND Point No.25.05 309. How much supply required for op-amp is a. +15v  CARVER TRAINING AND SERVICE PVT LTD b. 12v c. -45v d. 05v Principal of electronics S. CHAND Point No.25.04 310. Which signals are rejected by Differential amplifier___. a. Differential mode signals b. Common mode signals c. Both a & b d. Out off phase signal Principal of electronics S. CHAND Point no. 25.04 311. Negative feedback ___ a. Stabilizes gain of amplifier b. Decreases input impedance c. Increase output impedance d. Both a & b Principal of electronics S. CHAND Point no. 25.07 314. Feedback element in the integrator is ____ a. capacitor b. resistor c. inductor d. only b is correct Principal of electronics S. CHAND Page no. 2510 315. A non-inverting op-amp a. has a non-inverting input and an inverting output  CARVER TRAINING AND SERVICE PVT LTD b. has an inverting input and a non-inverting output c. a non-inverting input connection only Principal of electronics S. CHAND Point no. 25.08 316. ____ circuit is called as unity gain buffer. a. Inverting amplifier b. Voltage follower c. Non inverting amplifier d. Summing Amplifier Principal of electronics S. CHAND Point no. 25.08 317. With zero volt on both inputs, an OPAMP ideally should have an output____ a. Equal to the positive supply voltage b. Equal to the negative supply voltage c. Equal to zero d. Equal to CMRR Principal of electronics S. CHAND Point no. 25.08 318. For an OPAMP with negative feedback, the output is ____ a. Equal to the input b. Fed back to the inverting input c. Increased d. Fed back to the non-inverting input Principal of electronics S. CHAND Point no. 25.05 319. The input offset current equals the a. Difference between the two base currents b. Average of the two base currents  CARVER TRAINING AND SERVICE PVT LTD c. Collector current divided by current gain d. Difference between the two base-emitter voltages Principal of electronics V. K. Mehta Page no.-678 320. When the two input terminals of a diff amp are grounded a. The base currents are equal b. The collector currents are equal c. An output error voltage usually exists d. The ac output voltage is zero Principal of electronics V. K. Mehta Page no.-667 321. A common-mode signal is applied to a. The non- inverting input b. The inverting input c. Both inputs d. The top of the tail resistor Principal of electronics V. K. Mehta Page no.-667 322. The common-mode voltage gain is a. Smaller than the voltage gain b. Equal to the voltage gain c. Greater than the voltage gain d. None of the above Principal of electronics V. K. Mehta Page no.-667 323. The input stage of an op amp is usually a a. Differential amp  CARVER TRAINING AND SERVICE PVT LTD b. Class B push-pull amplifier c. CE amplifier d. Swamped amplifier Principal of electronics V. K. Mehta Page no.-663 324. The common-mode rejection ratio is a. Very low b. As high as possible c. Equal to the voltage gain d. Equal to the common-mode voltage gain Principal of electronics V. K. Mehta Page no.-670 325. The typical input stage of an op amp has a a. Single-ended input and single-ended output b. Single-ended input and differential output c. Differential input and single-ended output d. Differential input and differential output Principal of electronics V. K. Mehta Page no.-663 326. The input offset current is usually a. Less than the input bias current b. Equal to zero c. Less than the input offset voltage d. Unimportant when a base resistor is used Principal of electronics V. K. Mehta Page no.-668  CARVER TRAINING AND SERVICE PVT LTD 327. With both bases grounded, the only offset that produces an error is the a. Input offset current b. Input bias current c. Input offset voltage d. β Principal of electronics V. K. Mehta Page no.-668 328. The voltage gain of a loaded differential amp is a. Large than the unloaded voltage gain b. Equal to RC / re c. Smaller than the unloaded voltage gain d. Impossible to determine Principal of electronics V. K. Mehta Page no.-665 329. At the unity-gain frequency, the open-loop voltage gain is a. 1 b. AV(mid) c. Zero d. Very large Principal of electronics V. K. Mehta Page no.-678 330. If the cutoff frequency is 20 Hz and the mid-band open-loop voltage gain is 1,000,000 the unity-gain frequency is a. 20 Hz b. 1 MHz  CARVER TRAINING AND SERVICE PVT LTD c. 2 MHz d. 20 MHz Principal of electronics V. K. Mehta Page no.-682 331. When the initial slope of a sine wave is greater than the slew rate. a. Distortion occurs b. Linear operation occurs c. Voltage gain is maximum d. The op amp works best Principal of electronics V. K. Mehta Page no.-692 332. A 741 C contains a. Distortion resistors b. Inductors c. Active-load resistors d. A large coupling capacitor Principal of electronics V. K. Mehta Page no.-663 333. The input impedance of a BIFET op amp is a. Low b. Medium c. High d. Extremely high Principal of electronics V. K. Mehta Page no.-668  CARVER TRAINING AND SERVICE PVT LTD 334. The 741 C has a unity-gain frequency of a. 10 Hz b. 20 Hz c. 1 MHz d. 15 MHz Principal of electronics V. K. Mehta Page no.-694 335. An op amp has a voltage gain of 200,000. If the output voltage is 1 V, the input voltage is a. 2 μV b. 5 μV c. 10 V d. 1 V Principal of electronics V. K. Mehta Page no.-694 336. A 741 C has a. A voltage gain of 100,000 b. An input impedance of 2 MΩ c. An output impedance of 75 Ω d. All of the above Principal of electronics V. K. Mehta Page no.-694 337. The voltage follower has a a. Closed-loop voltage gain of unity b. Small open-loop voltage gain c. Closed-loop bandwidth of zero d. Large closed-loop output impedance Principal of electronics V. K. Mehta chapter no.25  CARVER TRAINING AND SERVICE PVT LTD 338. An instrumentation amplifier has a high a. Output impedance b. Power gain c. CMRR d. Supply voltage Principal of electronics V. K. Mehta chapter no.25 339. In a differential amplifier, the CMRR is limited mostly by the a. CMRR of the op amp b. Gain-bandwidth product c. Supply voltages d. Tolerance of the resistors Principal of electronics V. K. Mehta chapter no.25 340. The input signal for an instrumentation amplifier usually comes from a. An inverting amplifier b. A resistor c. A differential amplifier d. A wheat- stone bridge Principal of electronics V. K. Mehta chapter no.25 341. In a nonlinear op-amp circuit, the a. Op amp never saturates b. Feedback loop is never opened  CARVER TRAINING AND SERVICE PVT LTD c. Output shape is the same as the input shape d. Op amp may saturate Principal of electronics V. K. Mehta chapter no.25 342. To detect when the input is greater than a particular value, use a a. Comparator b. Clamper c. Limiter d. Relaxation Principal of electronics V. K. Mehta Page no.-719 343. The voltage out of a Schmitt trigger is a. A low voltage b. A high voltage c. Either a low or a high voltage d. A sine wave Principal of electronics V. K. Mehta chapter no.25 344. Hysteresis prevents false triggering associated with a. A sinusoidal input b. Noise voltages c. Stray capacitances d. Trip points Principal of electronics V. K. Mehta chapter no.25 345. If the input is a rectangular pulse, the output of an integrator is a  CARVER TRAINING AND SERVICE PVT LTD a. Sine wave b. Square wave c. Ramp d. Rectangular pulse Principal of electronics V. K. Mehta Page no.-713 346. When a large sine wave drives a Schmitt trigger, the output is a a. Rectangular wave b. Triangular wave c. Rectified sine wave d. Series of ramps Principal of electronics V. K. Mehta Page no.-717 347. A comparator with a trip point of zero is sometimes called a a. Threshold detector b. Zero-crossing detector c. Positive limit detector d. Half-wave detector Principal of electronics V. K. Mehta Page no.-719  CARVER TRAINING AND SERVICE PVT LTD 348. The trip point of a comparator is the input voltage that causes a. The circuit to oscillate b. Peak detection of the input signal c. The output to switch states d. Clamping to occur Principal of electronics V. K. Mehta Page no.-719 349. In an active peak detector, the discharging time constant is a. Much longer than the period b. Much shorter than the period c. Equal to the period d. The same as the charging time constant Principal of electronics V. K. Mehta Page no.-719 350. A window comparator a. Has only one usable threshold b. Uses hysteresis to speed up response c. Clamps the input positively d. Detects an input voltage between two limits Principal of electronics V. K. Mehta Page no.-719 CARVER TRAINING AND SERVICE PVT LTD  CARVER TRAINING AND SERVICE PVT LTD 4.2. Printed circuit board 1. Instead of copper sometimes the conducting material used for PCB is ____. a. Aluminium b. Silicon c. Germanium d. Only b is correct Aircraft Electricity and Electronics 5th Edition Eismin Page no. 122. 2. Cupric chloride, chromic acid, alkaline ammonia are the example of _____. a. Etchant b. Flux c. Only b is correct d. Both a & b Aircraft Electricity and Electronics 5th Edition Eismin Page no. 122. 3. To save the space on PCB ____ mounting is to be carried out. a. Vertical b. Horizontal c. Axial d. Center Aircraft Electricity and Electronics 5th Edition Eismin Page no. 122. 4. Solder with ____mm to ____ mm diameter can be used for PCB work. a. 0.75mm-1mm  CARVER TRAINING AND SERVICE PVT LTD b. 0.075mm-1mm c. 0.075mm-0.1mm d. 1mm-10mm Aircraft Electricity and Electronics 5th Edition Eismin Page no. 122. 5. _____ soldering is most common method of attaching surface mount components to a circuit board. a. Dip soldering b. Wave soldering c. Reflow soldering d. Both a & b Aircraft Electricity and Electronics 5th Edition Eismin Page no. 122. 6. ____ gives green or brown colour to PCB. a. Etching b. Solder mask c. Silk screen d. Both b & c Aircraft Electricity and Electronics 5th Edition Eismin Page no. 122. 7. In single layer PCB component mounting is done on …… to the conductor track. a. Opposite side b. Same side c. Both a & b d. Top side Aircraft Electricity and Electronics 5th Edition Eismin Page no. 122.  CARVER TRAINING AND SERVICE PVT LTD 8. How PCB is protected after manufacture? a. It has non conductive varnish b. With the help of wax c. Conformal coating/Solder mask d. Both a & b Aircraft Electricity and Electronics 5th Edition Eismin Page no. 122. 9. A multilayer PCB has a. Two or more layer connected in series b. Two or more layer on one or both sides c. One layer on either side d. Both a & b Aircraft Electricity and Electronics 5th Edition Eismin Page no. 122. 10. In Double side PCB a. The circuit is etched on both sides b. Space is not important than the cost of PCB c. It has less cost d. None of these Aircraft Electricity and Electronics 5th Edition Eismin Page no. 122. 11. Flexible PCB is used in___ a. Cameras b. Satellites c. Only b is correct d. Both a & b Aircraft Electricity and Electronics 5th Edition Eismin Page no. 122.  CARVER TRAINING AND SERVICE PVT LTD 12. Ferric chloride is widely used because ___ a. It has long etching time b. Stored for long time c. Both a & b d. Stored for short time Aircraft Electricity and Electronics 5th Edition Eismin Page no. 122. 13. When compared to a system that is constructed on one board, a modular system using Printed Circuit Boards (PCBs) is a. Harder to fault find b. More expensive for spares c. Easier to fault find. d. Both a & b Aircraft Electricity and Electronics 5th Edition Eismin Page no. 122. 14. A Printed Circuit Board (PCB) is constructed of a plastic laminate which has bonded to one or both sides. a. A thin sheet of copper. b. Various thicknesses of copper. c. A thick sheet of copper. d. BOTH a & b Aircraft Electricity and Electronics 5th Edition Eismin Page no. 122. 15. How is a PCB protected after manufacture? a. By conformal coating b. With non-conductive varnish. c. With wax. d. Both a & c  CARVER TRAINING AND SERVICE PVT LTD Aircraft Electricity and Electronics 5th Edition Eismin Page no. 122. 16. A decoupling capacitor in a PCB is used to. Option a. minimize transient currents b. Pass DC only. c. Pass AC only. d. Pass AC & DC Aircraft Electricity and Electronics 5th Edition Eismin Page no. 122. 17. What is the base material of a PCB?. a. Insulator. b. Semiconductor. c. Conductor. d. Both a & b Aircraft Electricity and Electronics 5th Edition Eismin Page no. 122. 18. What are printed circuit boards made of a. Fiberglass board coated with copper in which circuits are etched. b. Synthetic resin board etched with copper. c. Matrix board with components soldered on. d. Both a & b Aircraft Electricity and Electronics 5th Edition Eismin Page no. 122. 19. What is the ratio of tin & lead in soldering metal alloy? a. 50% & 50% b. 20% & 80% c. 10% & 90% d. 60% & 40% Aircraft Electricity and Electronics 5th Edition Eismin Page no. 122.  CARVER TRAINING AND SERVICE PVT LTD 20. PCB stands for a. Printed circuit board b. Proper circuit board c. Prepare circuit board d. Both a & b Aircraft Electricity and Electronics 5th Edition Eismin Page no. 122. 21. How is a PCB protected after manufacture? a. With non-conductive varnish b. With wax c. By conformal coating Aircraft Electricity and Electronics 5th Edition Eismin Page no. 122.  CARVER TRAINING AND SERVICE PVT LTD 4.3. Servomechanism 1. Synchronous is the name given to a. Rotary devices b. Electromechanical devices c. Position sensing devices d. All of the above Aircraft instruments Pallet Second Edition Page no.225 2. Which devices are used by servomechanism to control the power a. Electronic devices b. Hydraulic devices c. Mechanical devices d. All of the above Aircraft instruments Pallet Second Edition Page no.225 3. Servomechanism are classified on the basis of a. Information sampled at the output of the system for comparison with the input instructions b. Construction of the open and close loop system c. Operation of the open and close loop system d. All of the above Aircraft instruments Pallet Second Edition Page no.225 4. When error feedback is included in the design that system is called a. Open loop control system b. Closed loop control system c. Both a and b is correct d. Ata Aircraft instruments Pallet Second Edition Page no.225 5. In servomechanism with positive feedback the returning signal a. Increases the original signal b. Decreases the original signal  CARVER TRAINING AND SERVICE PVT LTD c. Depends on situation d. Both b and c is correct Aircraft instruments Pallet Second Edition Page no.-227 6. In open loop system control elements control a. Magnitude of the input to power amplifier b. Direction of the input to power amplifier c. Magnitude and direction of the input to motor d. Both a and b is correct Aircraft instruments Pallet Second Edition Page no.-227 7. Which control system has less accuracy a. Open loop control system b. Closed loop control system c. Positive feedback control system d. Negative feedback control system Aircraft instruments Pallet Second Edition Page no.-227 8. In which system variations or faults in load can be detected a. Open loop control system b. Closed loop control system c. Positive feedback control system d. Negative feedback control system Aircraft instruments Pallet Second Edition Page no.-227 9. In servomechanism feedback can be classified as a. Positive feedback b. Negative feedback  CARVER TRAINING AND SERVICE PVT LTD c. Both a and b d. None of the above Aircraft instruments Pallet Second Edition Page no.-225 10. In close loop system what are the advantages of replacing the human operator with automatic system as a. Get quicker and less accurate reading b. Automatic system is subject to fatigue c. Manpower saving Aircraft instruments Pallet Second Edition Page no.-225 11. What is the basic principle of transformer a. Mutual induction b. Electromagnetic induction c. Lenz’s law d. Left hand rule Aircraft instruments Pallet Second Edition Page no.-231 12. voltage transformer is also know as a. Power transformer b. Current transformer c. Step-up transformer d. Step-down transformer Aircraft instruments Pallet Second Edition Page no.- 13. which formula is used to prove that the power in transformer is constant a. P=IE b. P=I²R c. P=E²/R d. All of the above Aircraft instruments Pallet Second Edition Page no.-231  CARVER TRAINING AND SERVICE PVT LTD 14. Instep up transformer winding ratio (primary winding/secondary winding) is 1:5 then what is the ratio of voltage and current in primary and secondary a. 1:5 and 5:1 respectively b. 5:1 and 1:5 respectively c. Voltage and current ratio will be same 1:5 only d. Voltage and current ratio will be same 5:1 only Aircraft instruments Pallet Second Edition Page no.-231 15. When the rotor and magnetic lines of force are perpendicular to each other then the amount of emf produced is a. Minimum b. Maximum c. 90% d. 10% Aircraft instruments Pallet Second Edition Page no.-231 16. Synchronous system falls into two clasess a. Direct current synchronous system b. alternating current synchronous system c. Both A and B correct d. conventional current synchronous system Aircraft instruments Pallet Second Edition Page no.-225 17. Which one of the following is correct a. Transmitter located at the source of measurement b. Receiver is used to position the indicating element c. Receiver is fitted at the source of measurement d. Both a and b is correct  CARVER TRAINING AND SERVICE PVT LTD Aircraft instruments Pallet Second Edition Page no.-225 18. the basic dcselyn system is a type of a. DC synchro system b. AC synchro system c. Both a and b is correct d. only b is correct Aircraft instruments Pallet Second Edition Page no.-225 19. Which one of the following system provides the information about the position and liquid contents a. The basic desynn system b. Slab desynn system c. Micro desynn system d. Torque synchro system Aircraft instruments Pallet Second Edition Page no.-225 20. resistor wound on circular former is called a. Toroidal resistor b. Fixed resistor c. Variable resistor d. All of the above Aircraft instruments Pallet Second Edition Page no.-227 21. Which one of the following is not a part of alternating-current synchronous system a. Resolver b. Basic desynn system c. Torque synchro d. Control synchro Aircraft instruments Pallet Second Edition Page no.-225  CARVER TRAINING AND SERVICE PVT LTD 22. the value of induced emf is depend upon a. Number of turns in winding b. Angle between magnetic lines of force and rotor c. Both a and b correct d. None of the above Aircraft instruments Pallet Second Edition Page no.-231 23. Torque synchro system provides information about a. Linier position b. Angular position c. Both a and b correct d. Only a is correct Aircraft instruments Pallet Second Edition Page no.-232 24. Intorque synchro system which one of the following winding works as a secondary winding a. Rotor winding b. Stator winding c. Both a and correct d. Only a is correct Aircraft instruments Pallet Second Edition Page no.-232 25. the rotor of TR is always try to align with a. The rotor of TX b. The stator of TR c. The stator of TX d. All of the above Aircraft instruments Pallet Second Edition Page no.-232  CARVER TRAINING AND SERVICE PVT LTD 26. When a system is said to be in “null” a. When the rotors of TX and TR occupy the same angular position b. Equal and opposite voltage is produced c. Both a and b correct d. Both a and b false Aircraft instruments Pallet Second Edition Page no.-232 27. Which one of the following system produces error voltage signal in receiving element a. Torque synchro b. Control synchro c. Differential synchro d. Resolver Aircraft instruments Pallet Second Edition Page no.-234 28. Control synchro system used in which one of the following instrument a. Asi b. Vsi c. Turn and slip indicator d. Attitude director indicator Aircraft instruments Pallet Second Edition Page no.-234 29. The receiver of the control synchro system is designated by a. TR b. CR c. CT d. CX Aircraft instruments Pallet Second Edition Page no.-234  CARVER TRAINING AND SERVICE PVT LTD 30. which of the following synchro system is used to detect and transmit error signals representative of two angular position, a. Torque synchro b. Control synchro c. Differential synchro d. Resolver Aircraft instruments Pallet Second Edition Page no.-236 ae. differential synchro a. Indicates the difference of two angles b. Indicates the sum of two angles c. Both a & b correct d. None of the above Aircraft instruments Pallet Second Edition Page no.-236 32. when differential synchros used with torque synchro it is denoted by a. TDX b. CDX c. TCX d. CTX Aircraft instruments Pallet Second Edition Page no.-236 33. when differential synchros used with control synchro it is denoted by a. TDX b. CDX c. TCX d. CTX Aircraft instruments Pallet Second Edition Page no.-236  CARVER TRAINING AND SERVICE PVT LTD 34. in differential synchro if tx rotor is at 60 degree and tdx rotor moves 15 degree clockwise, then what will be the position of the TR rotor? a. 45 degree b. 60 degree c. 105 degree. d. None of the above Aircraft instruments Pallet Second Edition Page no.-236 35. in differential synchro if tx rotor is at 60 degree and tdx rotor moves 15 degree anticlockwise, then what will be the position of the TR rotor? a. 45 degree b. 60 degree c. 105 degree d. 75 degree Aircraft instruments Pallet Second Edition Page no.-236 36. ifthe tdx rotor moves in clockwise direction then TR rotor moves in a. Clockwise direction b. Anti-clockwise direction c. Only b is correct d. None of the above Aircraft instruments Pallet Second Edition Page no.-236 37. In resolver synchros a. Cartesian coordinates can be converted into polar coordinates b. Polar coordinates can be converted into cartesian coordinates c. Only b is correct d. Both a & b correct  CARVER TRAINING AND SERVICE PVT LTD Aircraft instruments Pallet Second Edition Page no.-238 38. how many terminals are there in resolver synchro? a. 2 b. 4 c. 6 d. 8 Aircraft instruments Pallet Second Edition Page no.-238 39. typical use of resolver synchro is in a. Flight director system b. Integrated instrument system c. Both a & b d. None of the above Aircraft instruments Pallet Second Edition Page no.-238 40. while converting from polar to Cartesian which winding is unused a. R1-R2 b. S1-S2 c. S3-S4 d. R3-R4 Aircraft instruments Pallet Second Edition Page no.-238 41. rotor winding R3 and R4 is short-circuited because a. To improve accuracy b. To limit spurious response c. Both a and b correct d. None of the above Aircraft instruments Pallet Second Edition Page no.-238  CARVER TRAINING AND SERVICE PVT LTD 42. inresolver synchro EMF induced in stator windings depends on a. Angle of the rotor R1-R2 b. Angle of the rotor R3-R4 c. Angle of the ststor S1-S2 d. None of the above Aircraft instruments Pallet Second Edition Page no.-238 43. inresolver synchro when EMF induced in stator winding S1-S2 is maximum that time emf induced in S3-S4 is a. Maximum b. Minimum c. 40 v d. None of the above Aircraft instruments Pallet Second Edition Page no.-238 44. inresolver synchro when EMF induced in S3-S4 maximum then angle of the rotor R1-R2 with stator S1-S2 is a. 90 degree b. 60 degree c. 70 degree d. 180 degree Aircraft instruments Pallet Second Edition Page no.-238 45. theEMF induced in stator windings is in phase with voltage applied to rotor R1-R2 at the angle of? a. 0 to 90 degree b. 270 to 360 degree c. both a & b correct  CARVER TRAINING AND SERVICE PVT LTD d. None of the above Aircraft instruments Pallet Second Edition Page no.-238 46. the EMF induced in stator windings is out of phase with voltage applied to rotor R1-R2 at the angle of? a. 90 to 270 degree b. 270 to 360 degree c. 180 to 360 degree d. All of the above Aircraft instruments Pallet Second Edition Page no.-238 47. damping is force which a. Increases the oscillations of pointer b. Decreases the oscillations of pointer c. Neutralizes the pointer d. None of the above Aircraft instruments Pallet Second Edition Page no.-239 48. types of oscillations are a. Mechanical damping b. Electrical damping c. Both a and b correct d. Only a is correct Aircraft instruments Pallet Second Edition Page no.-239 49. Which one is the most accurate damping method a. Mechanical damping b. Electrical damping c. Air damping d. All of the above  CARVER TRAINING AND SERVICE PVT LTD Aircraft instruments Pallet Second Edition Page no.-239 50. which one of the transducer converts linear motion into electrical signals ? a. LVDT b. RVDT c. AVDT d. None of the above Aircraft instruments Pallet Second Edition Page no.-240 51. What is constructional difference between TX and TR? a. Rotor of the TX are mechanically coupled to an input shaft b. TX rotor is free to rotate c. TR is free to rotate d. Both (a) and (b) are correct Aircraft instruments Pallet Second Edition Page no.-232 52. When the rotors of TX and TR occupy the same angular positions, and power is applied equal and opposite the amount of voltage produced or that situation is called? a. Null position b. Electrical zero position c. Damping position d. None of the above Aircraft instruments Pallet Second Edition Page no.-232 53. The currents are more in the circuit where, a. Voltage unbalance is more b. Voltage unbalance is less c. No difference in voltage at both end d. All of the above  CARVER TRAINING AND SERVICE PVT LTD Aircraft instruments Pallet Second Edition Page no.-232 54. Control synchro is used in which one of the following instrument? a. Altimeters b. Air speed indicator c. Vertical speed indicator d. Both a and b correct Aircraft instruments Pallet Second Edition Page no.-233 55. inwhich one of the following system at electrical zero position there in a diffreenece of 90 degree between rotor of transmitter and rotor of the receiver? a. Torque synchro b. Control synchro c. Differential synchro d. Resolversynchro Aircraft instruments Pallet Second Edition Page no.-233 56. Incontrol synchro if difference between both rotor 90 degree is maintened then error voltage produced is? a. Zero b. Infinity c. Maximum d. None of the above Aircraft instruments Pallet Second Edition Page no.-233 57. device which converts one form of energy into another form is called ?  CARVER TRAINING AND SERVICE PVT LTD a. Transducer b. Amplifier c. Rectifier d. None of the avove Aircraft instruments Pallet Second Edition Page no.-345 58. Eand I is a transformer which is used in servomechanism system for the purpose of a. Error detector b. Error amplifier c. Error rectifier d. Error transducer Aircraft instruments Pallet Second Edition Page no.-107 59. In E and I transformer if the I bar (armature) is at center position then emf induced in secondary coils a. It will vary b. It will be equal c. It will change in very small amount d. None of the above Aircraft instruments Pallet Second Edition Page no.-76 60. What are the two major components of synchro a. The rotor and the stator b. The housing and the stator c. The rotor and the shaft d. The housing and the shaft Aircraft instruments Pallet Second Edition Page no.-232 61. How does the stator of TX receive voltage a. By physical connection with the rotor b. By magnetic coupling with the another stat