00 HB 1-10 (Key) - OLD Practice Questions PDF

1. What are the hardware data entry and exit 7. With a single decimal digit, the highest points of a microcomputer? count possible is ____. A. Ports A. 7 B. Holes...

1. What are the hardware data entry and exit 7. With a single decimal digit, the highest points of a microcomputer? count possible is ____. A. Ports A. 7 B. Holes B. 10 C. Sinks C. 8 D. Doorways D. 9 2. The relative permeability of paramagnetic 8. What single device converts chemical substance is ______. energy into electrical energy? A. much greater than 1 A. Solar B. a little greater than 1 B. Battery C. much less than 1 C. Motor D. equal to 1 D. Generator 3. Window comparator requires how many 9. Which materials have more free electrons? op-amps? A. Mica A. 2 B. Dielectrics B. 1 C. Conductors C. 3 D. Insulators D. 4 10. Which item is not a storage device? 4. Resistor noise is classified as ______ noise. A. Diskette A. blue B. CD ROM B. white C. Magnetic tape C. pink D. Card reader D. black 11. Ohm’s law is applicable to _______ circuit. 5. Determine how long a battery will last A. trivalent whose rating is 100 Ah; 24 volts and will B. exponential run a 300 watts electronic equipment and C. unilateral 50 watts light. D. linear A. 12.00 hours B. 6.85 hours 12. Dynamic memory stores information: C. 50.05 hours A. as long as power is applied and the D. 26.65 hours memory is refreshed B. even the power is not applied to the memory C. as long as power is applied to the memory D. when power is applied at regular intervals 13. Identify from the following statements that does not refer to the use of signal generator when testing a receiver out of generating 6. What oscillator operates on the principle of either modulated or unmodulated signal. velocity modulation and changing speed of A. Testing of receiver performance electron passing through the tube? B. Display of voltage or current graphs A. Magnetron C. Receiver alignment B. Colpitts D. Receiver servicing C. Hartley D. Klystron OCT 2023 HANDBOOK PROBLEM HB 1 14. What electronic component is a non-linear 20. Parallel cells have the same voltages as one resistor and its resistance is a function of cell but have: the voltage cross it? A. unstable resistance A. Triac B. fluctuating power output B. IC C. less current capacity C. Thyristor D. different current capacity D. Varistor 21. Materials with permeabilities slightly less 15. Comparing a vacuum tube diode and a than that of free space are referred to as germanium diode, the latter: A. ferromagnetic A. can withstand higher working B. paramagnetic current C. non – magnetic B. can be used with higher working D. diamagnetic voltages C. Both can withstand higher working 22. What is the logic circuit having two or more current and can be used with higher inputs but only one output, with high working voltages output if any or all inputs are high, with low D. cannot be used with as high PIV output only when all inputs are low? A. OR gate 16. What do you call individual points in B. AND gate graphic displays? C. NAND gate A. Columns D. NOR gate B. Resolutions C. Rows 23. A half-adder can be constructed using: D. Pixels A. AND gate B. Both Exclusive OR gate and AND gate 17. A zener diode is connected so that: C. Or gate A. it is reversed bias D. Exclusive OR gate B. the anode is positive with respect to the cathode C. the cathode is positive with respect 24. What do you call the term in electronic to the anode measuring devices when a metal increases D. Both the cathode is positive with resistance due to heat produced by current respect to the anode and it is flowing through them? reversed bias A. Positive temperature coefficient B. Negative resistance coefficient 18. What term is used to describe bias C. Positive resistance coefficient condition of a device or circuit where no D. Negative temperature coefficient current can flow? A. Cut-off B. Saturation 25. What is the output voltage of a silver C. Depletion cadmium cell? D. Steady A. 1.5 V B. 3.0 V 19. What term refers to the energy stored in an C. 1.1 V electromagnetic or electrostatic field? D. 0.8 V A. Joule - Coulomb B. Potential energy C. Kinetic energy D. Ampere – Joule 26. What do you call the process of converting an AC input to a DC output? OCT 2023 HANDBOOK PROBLEM HB 1  A. Radiation B. IC B. Variation C. Substance C. Alternation D. Substrate D. Rectification 34. One disadvantage of a dynamic RAM is a 27. How does an ohmmeter behave if its result of the need for: positive lead is connected to cathode of a A. refreshing diode while negative to anode? B. complementing A. Has very low resistance C. blowing fuse B. Has unstable resistance D. high voltage C. Has decreasing resistance D. Has infinite high resistance 35. What do you call the condition under which there is no power loss due to reflection at a 28. What counter follows the binary sequence? source/load junction owing to the fact that A. Shift counter the load impedance is conjugate of the B. Decimal counter source impedance? C. Binary counter A. Maximum power transfer D. Simplex counter B. Resonance C. Half power point 29. What is the unit of the reciprocal of D. Alignment capacitance in electronics? A. Farad 36. Which of the following dry cells has the B. Henry largest height? C. Daraf A. AAA D. Siemens B. AA C. D 30. What is the program used to enter a D. C program into the computer memory? A. Subroutine 37. What is called back EMF? B. Loader A. A voltage that opposes the applied C. Compiler EMF. D. Assembler B. A current that opposed the applied EMF. 31. Which of logic families below is noted for C. A current equal to the applied EMF. low power consumption? D. An opposing EMF equal to R A. DTL multiplied by I. B. I²L C. TTL 38. What transistor in which n-type and p-type D. NMOS materials are used? A. BJT 32. What is the process used to describe B. UJT analog-to-digital conversion? C. FET A. Digitize D. TTL B. Analogize C. Binarize D. Linearize 39. What law whereby the attraction or 33. What is a thin layer in a PCB which is firmly repulsion between two magnetic poles is bounded to an insulating base material? directly proportional to their strengths? A. Surface A. Newton`s first law OCT 2023 HANDBOOK PROBLEM HB 1  B. Coulomb`s first law C. 8 C. Newton`s second law D. 6 D. Coulomb`s second law 46. A conductor behaves as _______ at absolute 40. When an impurity having five electrons in zero temperature. the outer shell is added to the intrinsic A. a conductor semiconductor, it is called a/an ____. B. an insulator A. donor C. a variable resistor B. polarizer D. a superconductor C. acceptor D. negatizer 41. What concept whereby a small voltage is generated by a conductor with current in an external magnetic field? A. Hall effect B. Flywheel effect C. Magnetic effect D. Skin effect 42. What is known as the reciprocal of capacitance? A. Elastance B. Permittivity C. Conductance D. Permeability 43. Which of the following equipment is used to determine location in terms of coordinate, this is now widely used in modern communications? A. Global Positioning System (GPS) B. Bearing meter C. Altimeter D. Hydrometer 44. What phenomenon whereby substance attracts pieces or iron? A. Naturalism B. Electromagnetism C. Magnetism D. Coulomb`s Law 45. A two-pole, three-phase motor has_______ field poles. A. 2 B. 4 OCT 2023 HANDBOOK PROBLEM HB 1 1. What is the most influential factor in the A. CPU switching speed of saturated bipolar B. Cross-assembler transistor? C. Compiler A. Collector current D. ALU B. Charge storage C. Base current 7. What is the equivalent of decimal 7 in octal D. HFE A. 14 B. 7 2. Why is the resistance of a conductor C. 21 different for RF current than for dc? D. 49 A. Because the insulation conducts current at radio frequencies. 8. The unit for the density of data recorded on B. Because conductors are non-linear magnetic tape is measure in: devices. A. bits per inch C. Because of skin effect. B. bit error rate D. Because of the Heisenberg C. bit suffering rate uncertainty principle. D. bits per second 3. Signal generators are classified according 9. Which of the following Integrated Circuits to frequency which are either AF or RF contains the most gate? generators, AF generators are referred to A. SS as: B. LSI A. Hartley oscillators C. VLSI B. audio generators D. MSI C. frequency generators D. signal generators 10. When a logic circuit rejects an unwanted signal, this is termed as ________. 4. What condition does resonance occurs in A. noise margin an electrical circuit? B. propagation delay A. When the square root of minimum C. power consumption capacitive and inductive reactances D. logic levels is equal to the resonant frequency. B. When the inductive and capacitive 11. What do you call the oscillator circuit that reactances are equal. uses a tapped coil tuned circuit? C. When the power factor is at A. Clapp minimum. B. Colpitts D. When the square root of the product C. Hartley of the capacitive and inductive D. Pierce reactances is equal to the resonant frequency. 12. Which is not a part of a magnetron oscillator? 5. A FET: A. Cavity resonator A. also has an active region B. Anode B. has more terminals compared to C. Grid BJT D. Magnetic field C. is a voltage-controlled device D. has a single charged carrier 13. Speed of a logic circuit is normally express A. Propagation delay 6. What software converts a high-level B. Power consumption language program into machine or C. Speed immunity assembly language program? D. Logic leve OCT 2023 HANDBOOK PROBLEM HB 2 14. Steel is hard to magnetize because of its: 21. What process by which a substance A. high density becomes a magnet when placed near a B. high retentivity magnet? C. low permeability A. Magnetic induction D. high permeability B. Magnetic reflection C. Influx of density 15. The arrow in the symbol of a transistor D. Electromagnetic induction indicates the direction of: A. donor ion current 22. Efficient oscillators are those of what class B. hole current in the emitter A. C C. electron current in the collector B. AB D. electron current in the emitter C. A D. B 16. What is the term for the phenomenon which occurs in an electrical circuit when 23. What refers to BCD counter? the inductive reactance equals the A. Decade counter capacitive reactance? B. Shift relay A. Reactive Quiescence C. Frequency counter B. High Q D. Binary counter C. Resonance D. Reactive Equilibrium 24. A digital word consisting of only four bits is called a _____. 17. How do you call an eight-element vacuum- A. nibble tube? B. pixel A. Septode C. quadbit B. Octode D. dibit C. Pentode D. Hexode 25. What is an instruction in a source language that is to be replaced by a defined sequence 18. What is the most widely used digital logic of instruction in the same source language? family? A. Macro-instruction A. ECL B. Statement B. DTL C. Mnemonic C. RTL D. Source code D. TTL 26. Which one of the following is the most 19. What is the output for a four lead acid cells? outstanding advantage of CMOS? A. 1.6 V A. Low impedance input and output B. 3.2 V levels C. 5.8 V B. Simplicity in fabrication process and D. 8.4 V low power C. Frequency compensation by 20. Which one of the following is not a part of internal feedback CRT? D. None of the fabrication materials A. Electrogun are toxic. B. Grid C. Aquadag D. Armature OCT 2023 HANDBOOK PROBLEM HB 2 27. What device stays on once triggered and stores one of the two conditions as a digital circuit? A. Integrator B. Gate C. Latch D. Oscillator 33. A triac in _______ is equivalent to two SCRs. A. parallel-series 28. What refers to the of dc motor-generator B. parallel with common field coils for both motor and C. inverse parallel generator? A. Dyna Motor 34. What do you call the potential barrier and B. Motor-Generator a depletion layer that are established near C. Synchronous Motor the PN junction of a diode with no applied D. Polyphase Motor bias voltage? A. Infiltration 29. What refers to the majority carrier in an N- B. Adhesion type semiconductor? C. Ohm`s law A. Hole D. Diffusion B. Negative ion C. Electron 35. Which is called the electrical prime mover? D. Positive ion A. Generator B. Commutator 30. What user program has the ability to move C. Armature a robot axis to any position within its D. Motor range? A. Positive stop 36. What the most negative point of a full-wave B. Continuous-path rectifier circuit? C. Point-to-point A. Both plates D. Pick-and-place B. Center tapped on the high voltage secondary 31. How much power does an electronic C. Chassis (ground) equipment consumed, assuming a 5.50 A D. Both cathodes current flowing and a 120-volt power source? 37. What element in electronics that serves as A. 66 watts a protection against overload? B. 660 watts A. Semiconductor C. 60 watts B. Resistor D. 125.5 watts C. Fuse D. Mica 38. The conductivity of an intrinsic semiconductor is greater than that of: A. Vacuum B. Glass 32. How many silver zinc cells in series are C. Vacuum and glass needed for a 9 V battery? D. Copper A. 3 B. 9 C. 7 D. 6 OCT 2023 HANDBOOK PROBLEM HB 2 39. The greater the diameter of a wire, the _____ 44. What is the term used to express the is the resistance. amount of electrical energy stored in an A. stable electrostatic field? B. higher A. Coulomb C. unstable B. Volt D. lesser C. Watt D. Joule 40. Find the flux density in gauss having a flux of 20,000 Mx through a perpendicular area 45. What is the unit of reluctance in SI? of 2 cm squared. A. Maxwells A. 40,000 G B. At/Wb B. 20,000 G C. Gauss C. 22,000 G D. Weber D. 10,000 G 46. The decibel gain of cascaded amplifier equals: A. sum of voltage and current gain B. sum of individual gains C. product of individual gains D. difference of individual gains 47. How much is the equivalent power in watts can a horsepower provide? A. 2238 watts 41. What is the effect in terms of bandwidth B. 300 watts when the Q of a single-tuned stage is C. 1,192 watts doubled? D. 746 watts A. Doubled B. Halved 48. Which of the following characterizes CMOS C. The same logic? D. Four times A. P-channel FETs B. Both P-channel and N-channel FETs 42. What type of transformer is used to protect C. Bipolar FETs technicians and operators from deadly D. N-channel FETs electrical shock? A. Isolation transformer 49. The decimal 36,020 is equivalent to______ B. Step-down transformer hexadecimal. C. Step-up transformer A. 8BC8 D. Absorber transformer B. 88BC C. 8CB4 43. What is the percentage error of reading of D. 884C an ammeter due to ammeter insertion? Ammeter parameters include 70 ohms 50. In the symbol for the pnp transistor: internal resistance and a load resistor of A. the arrow points to the cathode 1.4 k ohms. B. the arrow points from the base A. 2.0 % C. the arrow points towards the base B. 7.5 % D. the arrow points from the cathode C. 4.76 % D. 3.76 % OCT 2023 HANDBOOK PROBLEM HB 2 1. What type of overload operates on the 8. A solid-state logical device which only gives principle of electromagnetism? a “1” output if all inputs are “0” is called a A. Fuse ______ gate. B. Melting alloy A. OR C. Bimetalli B. NAND D. Magnetic C. NOT D. NOR 2. A half wave rectifier circuit utilizing one half of an AC input cycle has a ripple 9. The region in electronic transistor that is frequency in its output equivalent to _______. very lightly doped and very thin is referred A. 240 cps to the B. 60 cps A. collector C. 110 cps B. collector-base D. 120 cps C. emitter D. base 3. Which is not a part of CRT of oscilloscope? A. Digital panel meter 10. An amplifier with an input resistance of B. Deflecting plates 600 ohms has an input current of 500 C. Aquadag coating microamperes. It delivers 100 mA to a D. Electron gun 1000 ohms load. Calculate the dB gain of the amplifier. 4. How many symbols are used to octal digital A. 35.33 dB number system? B. 25.2 dB A. 16 C. 50.4 dB B. 8 D. 48.2 dB C. 2 D. 4 5. The response of the filter is plotted in ______ in a bode plot. A. radians B. decibels C. siemens D. watts 6. Classified as a hot-carrier type diode and 11. How do zener diodes widely used? uses a metal catwhisker as its anode. A. Variable resistors A. PIN diode B. Power collectors B. Shockley diode C. Current limiters C. Diac diode D. Voltage regulators D. Point-contact 12. Which meter uses a dual triode tube and 7. Which of the following is not use in requires external power for operation? hexadecimal digital symbols? A. TVM A. H B. None of the choices B. F C. VOM C. A D. VTVM D. C OCT 2023 HANDBOOK PROBLEM HB 3 13. The ratio between primary and secondary C. An electroscope current is a transformer does not depend D. A logic probe on the: A. primary voltage 20. What type of bias is required by an LED to B. resistance of the windings produce luminescence? C. nature of the core A. Inductive bias D. turns ratio in the windings B. Forward bias C. Reverse bias 14. Periodically recharging a dynamic cell D. Zero bias capacitance is called _____. A. retrieving 21. How do you describe materials whose B. charging permeabilities are a little greater than that C. string of free space? D. refreshing A. Ferromagnetic B. Diamagnetic 15. What is the name of the field-effect C. Paramagnetic transistor designed to work as a power D. Non-magnetic amplifier? A. VFET 22. What is the special program outside the B. MESFET normal instruction sequence? C. MOSFET A. Sub-instruction D. JFET B. Subroutine C. Subprogram 16. What are the two stable operating D. Add routine conditions of an SCR? A. NPN conduction and PNP 23. Which LED color is mostly available? conduction A. Blue B. Conducting and nonconducting B. Green C. Oscillating and quiescent C. White D. Forward conducting and reverse D. Red conducting 24. Find the power across the resistor of 5 17. Frequency at which series resonance ohms delivered from a battery of an occurs at: internal resistance of 3 ohms and a A. Z = X_L constant emf of 4 volts. B. X_L = X_C A. 10 watts C. X_L = R B. 0.6 watts D. X_C = R C. 1.25 watts D. 1.2 watts 18. The anode of a semiconductor diode indicates a ______ charge during conduction. A. negative B. either depending on design C. neutral D. positive 19. What piece of test equipment besides an oscilloscope can be used to indicate pulse conditions in a digital-logic circuit? A. A Wheatstone bridge B. A galvanometer OCT 2023 HANDBOOK PROBLEM HB 3 25. What T-section has capacitance only in the A. 19 k ohms ±20% series arms and inductance only in the B. 1.9 k ohms±10% parallel branch? C. 19 k ohms ±2% A. High-pass filter D. 190 k ohms ±10% B. Low-pass filter C. Bandpass filter 31. Which semiconductor material is D. Bandstop filter commonly used in the construction of LED? A. Gallium Arsenide (GaAs) 26. What is the cause of parallax error in B. Gallium (Ga) analog-type meter? C. Silicon (Si) A. Improper shunt value across the D. Germanium (Ge) meter movement B. Reading the meter at an angle 32. In a series RLC circuit, V_L = V_C when the: C. Connecting the meter across the A. power factor is zero voltage-being measured B. circuit is at resonance D. Friction in the meter movement C. current leads the total voltage by bearings 90° D. voltage across the resistance is 27. The reading on a watt-hour meter is minimum actually a measure of: A. power 33. An insulating element or material has B. time capability of C. temperature A. conducting large current D. energy B. storing voltage C. preventing short circuit between 28. A radio equipment will be used 70% at 50 two conducting wires amperes rating for 5 hours, how much D. storing high currents capacity of a dry battery is needed? A. 250 Ah 34. CMOS stands for: B. 175 Ah A. Complementary Metal-Oxide C. 35 Ah Substrate D. 17.5 Ah B. Common Mode Oscillating System C. Complementary Metal-Oxide Semiconductor D. Complementary Mica-Oxide Silicon 35. The processing of a number sequence is the method used in __________. A. random memory B. digital filters 29. What T-section has inductance only in the C. modems series arms and capacitance only in the D. logic gates parallel branch? A. Bandstop filter 36. If 2 V is applied to a 20 dB attenuator, the B. Bandpass filter level will be: C. High-pass filter A. 0.02 V D. Low-pass filter B. 10 V C. 200 mV 30. Find the value of a resistor with the D. 5 V following color codes: brown, white, orange, red OCT 2023 HANDBOOK PROBLEM HB 3  41. The circulating or fly-wheel current in a tank circuit recreates the sinusoidal voltage waveform in: A. class A audio amplifiers B. class C RF power amplifiers C. class AB audio amplifiers D. phase inverters 42. What are the elements of unijunction transistors? 37. What is multi-wire connection between A. Gate, cathode and anode digital circuits? B. Base 1, base 2 and emitter A. Bus C. Gate, base 1 and base 2 B. Cable ribbon D. Gate, source and sink C. Wire tap D. Mutiplexed cable 43. Which of the following refers to the point where the intensity of magnetic line of 38. How many silver zinc cells in series are force is maximum? needed for a 9 V battery? A. Great circle A. 7 B. Weak pole B. 6 C. North pole C. 3 D. Magnetic pole D. 9 44. What is a sequence of instruction that tells the computer machine on how available data shall be processed? A. RAM B. Program C. Flowchart D. Command 45. What is the minimum ampere capacity of 39. When a piezoelectric crystal is panel box used today? mechanically deformed: A. 100 A. The crystal warranty is invalidated. B. 150 B. Voltages are produced. C. 30 C. It is ruined. D. 60 D. The resistance across the faces is zero. 46. Another name for a magnetic starter is a A. magnetic control 40. Erratic operation can be isolated by: B. manual switch A. piggybacking IC C. manual starter B. cooling or freezing the component D. contactor C. heating the component with a hot blower and note performance of the 47. When you demagnetized properly by circuit applying an AC field and then gradually D. All of the choices reduced it to zero, it is called A. degaussing B. Gaussian C. damping D. decaying OCT 2023 HANDBOOK PROBLEM HB 3 48. At resonance, one of the following conditions cannot be true for a series RLC circuit. A. Z = jX_L B. Z = R C. X_L = X_C D. The magnitude of Z is the square root of R² + (X_L – X_C)² 49. A SAW device has electrodes that are described as __________. A. silicon-on-substance B. polyoxidized epitaxial wafer C. micrometer siliconite D. interdigital 50. There are approximately how many free carriers in a cubic centimeter of intrinsic silicon material at room temperature? A. 2.5 x 10¹⁰ B. 1.5 x 10⁵ C. 1.5 x 10¹⁰ D. 2.5 x 10⁵ OCT 2023 HANDBOOK PROBLEM HB 3 1. The symbol Q refers to: 8. Where does practically all of the RF current A. quality factor in a conductor? B. quick tuning A. Along the surface. C. qualification tests B. In the center of the conductor. D. resonance quotient C. In the magnetic field around the conductor. 2. Which type of digital IC is least susceptible D. In the electromagnetic field in the to noise? conductor center. A. N-channel-coupled logic B. Emitted-coupled logic 9. Thyratrons in industrial electronic refers to C. Transistor-transistor logic A. an electronic triode D. Base-coupled logic B. a gas-filled triode C. a gas-filled diode 3. Generally, the printer of an indicating D. a vacuum tube instrument is made of ______. A. soft steel 10. The relation of the voltage across an B. silver inductor to its current is describe as: C. aluminum A. lagging the current by 90 degrees. D. copper B. in phase with the current. C. leading the current by 90 degrees. 4. Which one works only on dc supply? D. leading the current by 180 degrees. A. Electric heater B. Electric lamp 11. In a Bode plot for a filter, the frequency C. Refrigerator scale is D. Electroplating A. decibels B. exponential 5. What type of diode made of metal whisker C. trigonometric touching a very small semiconductor die? D. logarithmic A. Junction diode B. Varactor diode 12. When the capacitor energy is maximum, C. Point contact diode the inductor energy is ________ in an LC D. Zener diode circuit. A. minimum 6. In a series circuit, the power factor will be B. zero zero if: C. maximum A. the value of the capacitance is zero D. half-wave between maximum and farad. minimum B. the applied voltage is dropped to zero. 13. Which of the following refers to a C. the current leads or lags voltage by characteristic of a magnetic line of force? 90°. A. Travels from back and forth D. the frequency is adjusted to 1 kHz. between the north and south poles of a bar magnet. 7. In sequential circuit analysis, which of the B. Travels from south to north through following tables shown the tabulation of all the surrounding medium of a bar possible inputs, outputs, present states and magnet. next states? C. Stay stationary between the north A. State table and the south of a bar magnet. B. Excitation table D. Travels from north to south through C. Sequential table the surrounding medium of a bar D. Function table magnet. OCT 2023 HANDBOOK PROBLEM HB 4 14. What is the most costly coupling? 21. The force between the two electrically A. Impedance coupling charged object is called B. RC coupling A. electrostatic force C. Transformer coupling B. electromagnetic deflection D. Direct coupling C. magnetic force D. electroscopic force 15. A Wien-bridge is sometimes called a: A. phase filter 22. If the value of collector-emitter voltage Vce B. notch filter decreases, then collector current Ic ______. C. Wheatstone bridge A. decreases D. twin-T filter B. equals zero C. increases 16. An electrical temperature sensing device D. remains the same which composes of a pair of different kind of metal wires joined together is a complete 23. What is the output of a half-wave rectifier? loop is called ______. A. Half-wave rectified signal A. Flowmeter B. 100 % Ac signal B. Thermocouple C. Sinusoidal signal C. Photo conductor cell D. Square wave signal D. Psychrometer 24. What is the term used to express the ratio 17. Which one is the other name of zener of change in dc collector current to a diode? change in emitter current in a bipolar A. Esaki diode transistor? B. Tunnel diode A. Delta C. Shockley diode B. Gamma D. Breakdown diode C. Alpha D. Beta 18. At the half-power points, the gain is down by 25. What does the second strip of an electronic A. 3 dB resistor code represent? B. 0.5 dB A. Tolerance C. 6 dB B. Temperature D. 0.707 dB C. Second digit of the value D. Multiplier 19. A triac is equivalent to 2 SCRs in: A. inverse-parallel 26. Crystals have Q in the under of: B. parallel-series A. 100 C. parallel B. 50 D. serie C. 1000 D. more than 10,000 20. What do you call the flux that does not follow the intended path in a magnetic 27. How many diodes will you use in designing circuit? a half wave rectifier power supply? A. Leakage current flux A. Two B. Linked flux B. Four C. Leakage flux C. One D. Lost flux D. Three OCT 2023 HANDBOOK PROBLEM HB 4 28. What is the maximum collector efficiency of a resistance loaded class A power amplifier? A. 25 % B. 50 % C. 30 % D. 78.5 % 29. Other factors remaining constant, what would be the effect on the current flowing 34. For an ac circuit, the power factor is given in a given circuit if the applied potential by the equation was doubled? A. R/X_L A. It would be increased 4 times. B. R/Z B. It would be doubled. C. X_L/R C. It would be reduced by 1/2. D. Z/R D. It would be remained the same. 35. Double tuned circuits are used in ______ 30. Discrete optical waves can propagate in stages of a radio receivers. optical waveguide called ______. A. AF A. wavefront B. IF B. nodes C. Mixer C. step-index D. RF D. modes 36. Which of the following describes a relay? 31. What is the reason why transformer A. It is an electromechanical switch. coupling provides high rain? B. It is a mechanical switch. A. Because impedance matching can be C. It is an electronic switch. achieved. D. It is a magnetic switch. B. Because transformers are very efficient. 37. The current from the solar cell is increased C. Because transformer can provide by good isolation. A. connecting solar cells in parallel D. Because transformer step up the B. using lead acid cells in series with voltage. the solar cells C. using NiCd cells in parallel 32. How do you design direct current meter D. connecting solar cells in series such that it could read high current values? A. Employ series-parallel resistor 38. Rust in electrical (wire) connections will B. Open the circuit result to ________ C. Employ series resistor A. inductance D. Employ shunt resistor B. corrosion C. conductance 33. A 36-foot length of wire has a resistance of D. resistance 12 ohms per foot. If the wire’s cross- sectional area is reduced to 1/3 of its 39. DC machine’s yoke is made of what original value, the new resistance of the material? wire is _____ A. Aluminum A. 144 Ω B. Soft iron B. 3888 Ω C. Silicon steel C. 432 Ω D. Cast steel D. 1296 Ω OCT 2023 HANDBOOK PROBLEM HB 4 40. What is the property of the magnetic circuit 47. What is the term used to express ratio of that resists the establishment of the flux? change in the dc collector current to change A. Mutual inductance in base current in a bipolar transistor? B. Permeance A. Alpha C. Reluctance B. Delta D. Inductance C. Gamma D. Beta 41. Which flip-flop whose next output state does not depend on the present output 48. A meter-sensitivity control in test state? instrument would probably be a: A. RS A. logarithmic-taper potentiometer. B. JK B. wirewound resistor. C. T C. set of switchable, fixed resistors. D. D D. linear-taper potentiometer. 42. What is the charge of a hole? 49. What determines the sharpness of a A. Equal to that of an electric resonance curve of a tuned circuit? B. Equal to that of a neutron A. Inductor C. Zero B. Quality factor D. Equal to that of a proton C. Capacitor D. Resonant frequency 43. Which one is the paramagnetic material? A. Oxygen 50. The file of an oxide coated emitter is about B. Carbon A. 500 hours C. Bismuth B. 1,000 hours D. Copper C. 10,000 hours D. 100,000 hours 44. Which of the following statement is true in a series RLC circuit? A. Z = jX_L at the resonant frequency. B. The impedance is always resistive at resonance. C. The current leads V_L by 90°. D. The impedance is always greater than X_L. 45. The fuse with nothing but a straight wire inside is probably: A. a slow-blow type B. of a high current rating C. a quick-break type D. of a low current rating 46. Where does the energy of a standard electronic capacitor stored? A. Plates B. One of the terminals C. Terminals D. Dielectric material OCT 2023 HANDBOOK PROBLEM HB 4 1. Semiconductors which are considered to 8. For an accurate resistance measurement, be low-power or small signal have power ______ is used dissipation ratings of: A. Wien bridge A. 10 W or less B. Wheatstone bridge B. 1 W or less C. Kelvin bridge C. 5 W or less D. Ohmmeter D. exactly 1 W 9. What is the maximum rate at which the 2. What is the exact relative permittivity of output voltage can change in a given op- air? amplifier? A. 1.006 A. Slew rate B. 1.00006 B. Maximum voltage swing C. 1.06 C. Rise time D. 1.0006 D. Voltage output rate 3. A diagram showing procedures which are 10. If a full-wave rectifier has a dc voltage of followed and acted upon is called _______. 0.636 V_max, then a half-wave rectifier has A. algorithm a dc voltage of: B. block diagram A. 0.318 V_p-p C. flow chart B. 0.318 V_max D. schematic diagram C. 0.318 V_ave D. 0.318 V_rms 4. Silicon resistivity is about _______. A. 100 Ω-m 11. What is a relaxation oscillator that does not B. 100 Ω-cm require any form of external excitation? C. 100 Ω-dm A. Multivibrator D. 100 Ω-mm B. Free running C. Bi-stable 5. What do you call the emission of electrons D. Automatic from hot bodies? A. Hall effect 12. What do you call the periodic charging of a B. Edison effect dynamic cell? C. Radiation effect A. Recharging D. Peltier effect B. Restoring C. Refreshing 6. What current flows in the core of a D. Online charging transformer that produces heat? A. Convection current 13. What is the lagging effect between flux B. Hysteresis density of the material and the magnetizing C. Eddy current force applied? D. Conventional current A. Hysteresis B. Magnetization 7. What material whose permeability is C. Retentivity slightly greater than that of free space? D. Reluctivity A. Paramagnetic B. Non-magnetic C. Ferromagnetic D. Diamagnetic OCT 2023 HANDBOOK PROBLEM HB 5 14. When the parallel resonant LC circuit is in 20. What is the measure of the consistency or series with the load and the series resonant repeatability of measurement? circuit is shunted across the load, the filter A. Error behaves as _______. B. Exactness A. band pass C. Accuracy B. band stop D. Precision C. high pass D. low pass 21. If the value of the upper resistance limit of a resistor is 10.5 Ω what is its color coding? 15. When a diac is added with one more A. Brown, Black, Brown, Gold terminal, it becomes: B. Brown, Black, Black, Gold A. a quadrac C. Black, Brown, Brown, Gold B. a thyristor D. Black, Blue, Brown, Gold C. a triac D. an SCR 22. Which law determines the polarity of induced voltage? 16. What is the maximum efficiency of half A. Joule`s law wave rectification? B. Lenz`s law A. 76 % C. Ohm`s law B. 41 % D. Coulomb`s law C. 33 % D. 82 % 23. What is defined as the ratio of required input signal to the amount of deflection? 17. In a diode, when the cathode is negative A. Viscousity with respect to the cathode, diode is said to B. Relativity be C. Sensitivity A. cut-off D. Fidelity B. no bias C. forward bias 24. MOSFET and BJT are respectively D. reverse bias controlled by: A. Current and voltage 18. Which of the following statements is true? B. Both currents A. Si has equal number of shells with C. Voltage and current Ge. D. Both voltages B. Si has more number of shells that Ge. 25. What is the property of a magnetic material C. Si has infinite number of shells. which retains magnetism even after the D. Si has less number of shells than Ge. withdrawal of magnetizing force? A. Permittivity B. Retentivity 19. Which of the following are the common C. Reluctivity uses of zener diodes? D. Permeability A. Amplifiers B. Rectifiers 26. What law states that the ratio of the C. Regulators thermal conductivity to the electric D. Switches conductivity is proportional to the absolute temperature for all metals? A. Child`s law B. Wiedemann-Franz`s law C. Wien`s displacement law D. Hartley`s law OCT 2023 HANDBOOK PROBLEM HB 5 27. Positive feedback: 33. A way of correcting the power factor of an A. reduces gain. inductive circuit is by adding B. reduces distortion. A. more inductors C. increases gain and distortion. B. resistors D. increases bandwidth. C. capacitors D. transistor 28. What is the opposition to the creation of magnetic lines of force? 34. What is the unit of reluctance? A. Impedance A. At/Wb B. Reluctance B. Gilbert C. Elastance C. Oersted D. Permeance D. Maxwell 29. What power is found by multiplying the 35. What happens to the resistance of a copper sine of the phase angle, the effective source wire when its temperature is increased? voltage and the effective source current? A. It is unaffected. A. Reactive power B. It decreases. B. Dissipated power C. It becomes infinite. C. Apparent power D. It increases. D. Real power 36. A power in a circuit that is not lost in the 30. What term is used to express the ratio of form of heat is called ______. change in the dc collector current to the A. apparent power change in the base current in a bipolar B. true power transistor? C. resistive power A. Delta D. imaginary power B. Alpha C. Beta 37. What particles that make up the lattice in D. Gamma an ionic crystal? A. Electrons 31. An over tone quartz crystal is purposely B. Positrons ground to oscillate on: C. Protons A. negative harmonics of the D. Ions fundamental frequency. B. sub-harmonics of the fundamental 38. Using BJT, _________ is the amplifier frequency. configuration which has the highest gain. C. its fundamental frequency. A. common collector D. odd or even harmonics of the B. emitter follower fundamental frequency. C. common base D. common emitter 32. What factor/s determine the coefficient of coupling between two air core coils? 39. Diac is another term for a: A. The flux produced by one coil. A. five-layer diode B. The self-inductance of the two coils. B. three-layer diode C. The applied voltage in one of the C. four-layer diode coils. D. two-layer diode D. The self-inductance of the two coils and their mutual inductance. OCT 2023 HANDBOOK PROBLEM HB 5 40. What gaseous tube uses a pool of liquid 47. Which one is a characteristic of a cascaded mercury as its cathode? amplifier? A. Klystron A. Overall gain is decreased. B. Thyratron B. Overall gain is multiplied. C. Phanotron C. Overall gain is increased. D. TWT D. Overall gain is doubled. 41. Crystals have very: 48. What semiconductor material has an A. low quality factor excess of holes? B. high quality factor A. Extrinsic C. high resistance B. N-type D. low resistance C. P-type D. Intrinsic 42. If current flows from positive to negative, it is said to be a __________ 49. What element whose nuclei contains the A. convection current most tightly bound nucleons? B. conventional current A. Copper C. an electron current B. Helium D. drift current C. Iron D. Hydrogen 43. For a zener diode, the breakdown voltage is A. very sharp 50. What is the simplest and commonly used B. constant method to switch off an SCR? C. variable A. Reverse gate voltage application D. to be determined B. Anode-current interruption C. Forward gate voltage application 44. What should be used to clean a dirty tape D. Forced-communication technique head? A. Water B. Isopropyl alcohol C. Ferric chloride solution D. Oil 45. What emf is induced when a conductor is stationary and the magnetic field is moving or changing? A. Mutually induced emf B. Self-induced emf C. Dynamically induced emf D. Statically induced emf 46. An electrical circuit with a lagging current means that the circuit is _______. A. inductive. B. resonant. C. capacitive. D. resistive. OCT 2023 HANDBOOK PROBLEM HB 5 1. Which device conducts currents in either B. SiO₂ direction? C. Mica A. SCR D. CO₂ B. PNP transistor C. NPN transistor 8. What phenomenon is by which a magnetic D. TRIAC substance becomes a magnet when placed near a magnet? 2. What three-terminal thyristor device that A. Magnetic effect is similar to SCR and SCS in construction B. Magnetic phenomenon and operation and whose most obvious C. Magnetic induction advantage is the fact that it can easily be D. Electromagnetic induction switched ON and OFF using its single gate terminal? 9. The applied voltage equals the sum of the A. QUADRAC IR drops in what circuit? B. TRIAC A. Series circuit C. LASCR B. Resonant circuit D. GTO C. Magnetic circuit D. Parallel circuit 3. In an RLC circuit at resonance, the current that flows is a ______ current. 10. The force acting on a unit n-pole placed at A. leading that point is called _________. B. maximum A. intensity of magnetization C. lagging B. electric flux D. minimum C. electromagnetic field intensity D. electric field intensity 4. The resistivity of semiconductors is: A. not related to the resistivity of 11. The impedance of a circuit is not dependent insulator and conductor on: B. between the resistivity of insulator A. resistance and conductor B. capacitance C. more than that of insulators C. inductance D. less than that of conductors D. current 5. A bipolar junction transistor has ______ 12. What does a phototransistor do? region/s of operation. A. Changes electrical energy to light A. 3 energy. B. 2 B. Changes light energy to electrical C. 1 energy and amplifies it. D. 4 C. Amplifies electrical energy. D. Rectifies alternating current to 6. Field-effect transistor (FET) practically has direct current. ____ input resistance. A. infinity B. zero C. high D. low 7. Metal oxide semiconductor field-effect transistor (MOSFET) uses what type of insulator? A. Paper OCT 2023 HANDBOOK PROBLEM HB 6 13. Which of the following alloys consists of 22 19. Which type of circuit is commonly percent iron and 78 percent nickel? employed to control the flow of data in the A. German silver wire arithmetic section of a computer? B. Manganin A. A microprocessor C. Alnico B. A logic gate D. Permalloy C. Video card D. A multivibrators 14. What is the frequency in which a 0.1 µF has an X_C equal to 1000 Ω? 20. The address of the instruction to be A. 1590 MHz executed is stored in ________. B. 1590 Hz A. RAM C. 1590 MHz B. program counter D. 1590 kHz C. ROM D. Accumulator 21. What branch of engineering that deals with the magnetic effects of electric current? A. Electromagnetism B. Magnetism C. Electronics engineering D. Electrical engineering 22. What condition is required to turn on an 15. What happens to the breakdown voltage of SCR? a crystal diode when the doping level is A. The gate voltage is positive with increased? respect to the anode. A. Increases B. The anode must be positive with B. Unaffected respect to the cathode C. Stabilizes C. The cathode must be positive with D. Decreases respect to the anode. D. The anode must be positive with 16. What flux does not follow the intended respect to the gate. path in a magnetic circuit? A. Hysteresis 23. Data latch is the other name of: B. Linked flu A. RS flip-flop C. Leakage flux B. MS flip-flop D. Lost flux C. JK flip-flop D. D flip-flop 17. What is the other name of earth current? A. Telluric current 24. Which of the following alloys consists of 22 B. Convection current percent iron and 78 percent nickel? C. Conventional current A. Manganin D. Ground current B. Permalloy C. Constantan 18. What is the mixture of charged-particle D. Alnico gases? A. Nitrogen 25. The ripple frequency of a half-wave B. Oxygen rectifier that is operated with a 60 Hz C. Plasma power line is ____. D. Helium A. 60 Hz B. 120 Hz OCT 2023 HANDBOOK PROBLEM HB 6  C. 180 Hz D. cut-off region D. 30 Hz 33. What is the meter used to test insulation 26. A/an _______ is a coil of wire with more than resistance? one turn. A. Insulation meter A. inductor B. VOM B. wire-wound resistor C. Megohmmeter C. solenoid D. Multitester 27. In a parallel bank with unequal branch 34. What is the most stable type of biasing? resistances: A. Fixed bias A. The voltage is highest across the B. Voltage feedback lowest R. C. Voltage divider B. The current is highest in the lowest D. Emitter-stabilized R. C. The current is equal in all the 35. What is the resistance between collector branches. and emitter when an ideal transistor is at D. The current is equal in all branches. cut-off? A. A function of the output current 28. What is the air space between poles of a B. A function of the load impedance magnet called? C. Infinite A. Vacuum D. Zero B. Free space C. Atmosphere 36. Which of the following is not a secondary D. Air gap type of cell? A. Carbon zinc 29. Which transistor configuration provides a B. Silver cadmium phase reversal of 180 degrees? C. Lead acid A. Emitter follower D. Nickel cadmium B. Common collector C. Common emitter 37. Which transistor terminal handles most D. Common base current? A. Drain 30. Which one of the following is a vector B. Emitter quantity? C. Collector A. Flux density D. Base B. Relative permeability C. Magnetic field intensity 38. In an ionic crystal, what particles make up D. Relative permittivity the lattice? A. Electrons 31. What IC has up to 9 gates? B. Atoms A. MSI C. Neutrons B. LSI D. Protons C. SSI D. VLSI 39. A PN junction acts as a: A. unidirectional switch 32. A region of a PN junction with no holes and B. two-way switch electrons is called ________. C. bi-directional switch A. void region D. three-way switch B. avalanche region C. depletion region OCT 2023 HANDBOOK PROBLEM HB 6 40. The atoms of pure silicon and germanium 46. What effect about microwave oscillation arrange themselves in an orderly pattern that occurs in a small block of N-type called ______. gallium arsenide when a constant DC A. plasma voltage above a critical value is applied to B. Bohr`s model contact on opposite faces? C. atomic structure A. Skin effect D. crystal B. Hall effect C. Edison effect 41. A cold solder connection can best be D. Gunn effect repaired by: A. bridging 47. When an atom gains an additional B. substitution electrons: C. resoldering A. a positive ion results D. cooling B. a negative ion results C. a neutral atom is formed 42. What is the capacitance of a 5 µF capacitor D. covalent bonding is accomplished connected in series with a 10 µF capacitor? A. 15 μF 48. In a junction diode, the minority carriers B. 3.3 µF cause the presence of: C. 7.5 µF A. drift current D. 50 µF B. leakage current C. conventional current D. convection current 49. What is the specific reluctance of a material? A. Reluctivity B. Conductivity C. Resistivity D. Permeability 43. A resistive circuit has a/an ______ power factor. 50. The temperature coefficient of resistance A. negative of a semiconductor is ________. B. unity A. zero C. zero B. negative D. infinity C. positive D. infinite 44. Which type of bonding where two atoms share one or more pair of electrons? A. Molecular bonding B. Ionic bonding C. Metallic bonding D. Covalent bonding 45. What do you call the evaporation of electrons from a heated surface? A. Conduction B. Convection C. Thermionic emission D. Radiation OCT 2023 HANDBOOK PROBLEM HB 6 1. What is a special type of diode that is often B. Varactor diode used in RF switches, attenuators and C. Point contact diode various types of phase shifting devices? D. Zener diode A. Junction diode B. PIN diode 8. How many states do a decade counter C. Tunnel diode digital IC have? D. Varactor diode A. 6 B. 10 2. The necessary probe commonly used on C. 20 the oscilloscope when measuring high D. 15 frequency or high impedance circuits is the: 9. What is a microprocessor? A. demodulator probe A. Another name of a computer. B. voltage divider B. A name for a calculator chip. C. low-capacitance probe C. A small-scale integrated circuit. D. noise probe D. A CPU integrated circuit. 3. The value of leakage coefficient for 10. An external voltage source is applied to a p- electrical machines is usually about: type semiconductor. If the left end of the A. above 10 crystal is positive, which way do the B. 4 to 10 majority carriers flow? C. 0.5 to 1 A. Right D. 1.15 to 1.25 B. Impossible to say C. Neither flow 4. Which type of FET has no channel when D. Left VGS = 0 V? A. MOSFET enhancement type 11. Two factors which limit the use of vacuum B. MISFET tubes at VHF and UHF frequencies are C. MOSFET depletion type A. transit time interelectrode D. VFET capacitances B. interelectrode capacities and plate 5. The active and reactive components of line voltage current of an inductive circuit are equal. C. cathode emission and space charge The power factor of the circuit is: D. transit time and envelope size A. 1 B. 0.707 lagging 12. If the load resistance is 1 kΩ, a stiff voltage C. 0.5 lagging source has a resistance of: D. 0.866 lagging A. at least 10 Ω B. less than 100 kΩ 6. Which of the following is an acceptable C. less than 10 Ω method of solder removal from holes in a D. more than 100 Ω printed board? A. Compressed air 13. What is photoconductive effect? B. Toothpick A. The conversion of photon energy to C. Power drill electromotive energy. D. Soldering iron and suction device B. The increased conductivity of an illuminated semiconductor junction. 7. What type of a diode is made of a metal C. The decreased conductivity of an whisker touching a very small illuminated semiconductor junction. semiconductor die? D. The conversion of electromotive A. Junction diode energy to photon energy. OCT 2023 HANDBOOK PROBLEM HB 7 14. What is a bistable multivibrator circuit? 20. In a two-phase generator, the electrical A. An OR gate displacement between the two phase or B. A clock winding is ______ electrical degrees. C. An And gate A. 120 D. A flip-flop B. 90 C. 60 15. What device is used to control a motor from D. 180 a distance location? A. Manual starter 21. In a six-phase generator, the electrical B. Snap switch displacement between different phases or C. Magnetic controller windings is _________ electrical degrees. D. Drum switch A. 60 B. 45 16. Which of the following is a safety rule to C. 90 remember when soldering or desoldering? D. 120 A. Make sure the power is disconnected. 22. The armature winding of DC machine is B. Make sure you use a low wattage placed on the rotor to: soldering iron. A. facilitate commutation. C. Make sure that you use gloves in B. reduce armature reaction. soldering. C. reduce losses. D. Make sure not to use a soldering D. save iron. iron that emits huge transient voltage. 23. A permanent magnet does not exert a force on: 17. What are the advantages of using an LED? A. an unmagnetized iron bar A. High lumens per cm per cm and B. a magnetized iron bar low-power consumption C. a moving electric charge B. Current flows when the device is D. a stationary electric charge exposed to a light source C. High lumens per cm per cm and 24. Solder is: low-voltage requirement A. 60 % lead, 40 % tin D. Low-power consumption and long B. 40 % lead, 60 % tin life C. 50 % lead, 50 % tin D. 70 % lead, 30 % tin 18. The absolute permittivity of a material is given by 25. To measure high-frequency currents, A. D/E _______ ammeter is mostly used. B. DE A. hot-wire C. D²/E B. dynamometer D. E/D C. thermocouple D. moving iron 19. What causes high or erratic plate grid current readings in an RF amplifier? 26. If a radio receiver amplifies all the signal A. Parasitic oscillations frequencies equally well, it is said to have B. Run-down batteries. high: C. A shorted power supply. A. distortion D. The use of dynamometers. B. sensitivity C. fidelity D. selectivity OCT 2023 HANDBOOK PROBLEM HB 7 27. The full-scale voltage across a moving coil 34. What gear offers very high-power voltmeter is about: application? A. 100 V A. All of the choices B. 5 V B. Helical C. 50 mV C. Spur D. 10 V D. Worm 28. A certain wire has a resistance R. The 35. The emf produced in a wire by its motion resistance of another wire, identical with across a magnetic field does not depend on the first except for having twice its the: diameter is: A. diameter of the wire A. 4R B. length of the wire B. (1/4)R C. orientation of the wire C. 2R D. flux density of the field D. (1/2)R 36. Which electrode of a triode tube can be 29. What meter is often used in testing an compared with the collector region of a armature for short circuits? bipolar transistor? A. Growler A. Filament B. VTVM B. Plate C. Short circuit meter C. Cathode D. VOM D. Control grid 30. What device is used to prevent signals from 37. If a load resistance is 1 kΩ, a stiff current deeding back up the transmission line? source has a resistance of: A. Trap A. less than 10 Ω B. Preamplifier B. at least 10 Ω C. Line trap C. less than 100 Ω D. Terminating resistor D. more than 100 kΩ 31. Out of the following materials, the area of 38. What is a hard tube? hysteresis loop will be least for: A. A gas in the envelope. A. silicon steel B. A tungsten filament tube. B. soft steel C. No gas in the envelope. C. wrought iron D. A metal envelope tube. D. hard steel 39. What device is used to attenuate specific 32. What substance in its crystalline form is signals? used in oscillators? A. Trap A. Germanium B. Line tap off B. Quartz C. Splitter C. Silicon D. Drop tap D. Sapphire 40. What is the bulk resistance of a 1N4001? 33. What happens to the conductivity of a A. 0.23 Ω semiconductor junction when it is B. 1 Ω illuminated? C. 10 Ω A. It increases. D. 0 Ω B. It stays the same. C. It becomes temperature dependent. D. It decreases. OCT 2023 HANDBOOK PROBLEM HB 7 41. A typical value of ac plate resistance for a 48. The knee voltage of a diode is triode might be in the neighborhood of: approximately equal to the: A. 100 kΩ A. applied voltage B. 1000 kΩ B. barrier potential C. 10 Ω C. forward voltage D. 10 kΩ D. breakdown voltage 42. The transistor common-base amplifier is 49. What instrument is often used to check the similar to the vacuum tube: degree of motor shaft misalignment? A. video amplifier A. Voltmeter B. audio amplifier B. Clamp-on ammeter C. cathode-follower amplifier C. Growler D. grounded-grid amplifier D. Dial indicator 43. The merging of a free electron and a hole is 50. Which of the following lamps requires a called: cooling period prior to restarting? A. covalent bonding A. Mercury vapor B. lifetime B. Fluorescent C. recombination C. Incandescent D. thermal energy D. Neon 44. Hot-wire instruments have _______ scale. A. logarithmic B. squared C. exponential D. uniform 45. What do you call the device that is used to pull wire through a conduit? A. Strap B. Wire tong C. Fish tape D. Connector 46. What is the term for an out-of-phase, nonproductive power associated with inductors and capacitors? A. Effective power B. True power C. Reactive power D. Peak envelope power 47. What are the two primary classifications of zener diodes? A. Hot carrier and tunnel. B. Forward and reversed biased. C. Varactor and rectifying. D. Voltage regulator and voltage reference. OCT 2023 HANDBOOK PROBLEM HB 7 1. Which one of the following is commonly B. work law used as a semiconductor? C. Fleming`s left-hand rule A. Gallium-arsenide D. Fleming`s right hand rule B. Ferrite C. Tantalum 9. Which of the following is the possible D. Silver-mica trouble when an op-amplifier with inverting voltage-feedback has no output 2. The energy stored in a capacitor is given by: voltage? A. CV²/2 A. No feedback voltage B. CV B. Shorted load resistor C. C²V C. Open load resistor D. 2Q²/C D. No positive supply voltage 3. The collector voltage is low if the collector 10. The majority carriers in the base of an NPN resistor is transistor are _______. A. low A. negative ions B. high B. holes C. shorted C. free electrons D. open D. positive ions 4. Plate saturation results when: 11. To prevent oscillation, a ______ may be A. filament voltage is too high needed in a discrete voltage regulator. B. space-charge region is depleted A. capacitor C. plate temperature is too high B. transistor D. plate temperature is too low C. resistor D. zener diode 5. The transconductance of a FET ranges from: 12. What refers to transformer coupling? A. 100 to 500 mA/V A. Capacitive coupling B. 500 to 1,000 mA/V B. Direct coupling C. above 10,000 mA/V C. Resistive coupling D. 0.5 to 30 mA/V D. Link coupling 6. The lower the critical frequency means that 13. The op-amplifier integrator uses: the input coupling capacitance is _____. A. Hall effect A. zero B. capacitors B. lower C. the Miller effect C. higher D. inductors D. constant 14. An element of matter: 7. In a coupling circuit at high frequencies, the A. is an insulator current is: B. has a unique number of protons A. zero C. is a conductor B. average D. can be fabricated onto an IC chip C. minimum D. maximum 15. Theoretically, the reactance of a capacitor at dc is ______. 8. The direction of force on a current carrying A. zero conductor placed in a magnetic field can B. infinitely positive found by: C. very small A. cork-screw law D. infinitely negative OCT 2023 HANDBOOK PROBLEM HB 8 16. In a two-phase generator, the electrical 23. The collector current flows for ______ in a displacement between the two phases or class A amplifier windings is ____ electrical degrees. A. less than the whole cycle A. 180 B. half cycle B. 120 C. less than the half cycle C. 90 D. the entire cycle D. 60 24