EE Past Board Exam Questions April 2019 PDF

Past Board Exam Questions in Electrical Engineering Professional Subjects April 2019 1. Which statement about a charge placed on a dielectric material is true? A. The charge is instantly carried to the material’s surface B. The charge immediately lost the atmosphere C. The charge is confi...

Past Board Exam Questions in Electrical Engineering Professional Subjects April 2019 1. Which statement about a charge placed on a dielectric material is true? A. The charge is instantly carried to the material’s surface B. The charge immediately lost the atmosphere C. The charge is confined to the region in which the charge was placed* D. The charge increases the conductivity of the material 2. Which of the following is NOT a property of magnetic field lines? A. The field is stronger where the lines are closer together B. The lines intersect surface of equal intensity at right angles C. Magnetic field lines have no beginning and no ends D. The lines cross themselves only at right angles* 3. Which statement is true? A. Magnetic flux lines have sources only B. Magnetic flux lines have sinks only C. Magnetic flux lines have both sources and sinks D. Magnetic flux lines does not have sources and sinks* 4. The equivalent capacitance of two capacitors C1 and C2 connected in series is 7.3µF. If the value of C1 = 9.6µF, what is the value of C2? A. 30.5µF* B. 20.5µF C. 50.2µF D. 37.2µF 5. In DC motors, what is the definition of “field resistance”? A. It is the load resistance seen by a generator without considering inductance B. It is the resistance of the excitation circuit* C. It is the resistance of the armature windings plus the load resistance D. It is the static resistance of the motor 6. Which of the following are generally less for an alternating current than for a direct current? A. Heating effects B. Chemical effects* C. Magnetic effects D. Impedance 7. Which of the following cannot have a single unit of 100 MW? A. Hydro power plant B. Steam power plant C. Diesel power plant* D. Nuclear power plant 8. In the left-hand rule, thumb always represents direction of the _______. A. Voltage B. Force on conductor* C. Current D. Magnetic field 9. Three 3-ohm resistors are connected in parallel. This combination is then placed in series with another 3-ohm resistor. What is the equivalent resistance in ohm? A. 12 B. 9 C. 4* D. 6 10. A transformer with a maximum rating of 25 kVA supplies a load of 12 kW at power factor 60% lagging. How much additional kVA load can be added at 0.9 leading without exceeding the rating? A. 16.6 B. 12.8 C. 13.2 D. 11.8* Past Board Exam Questions in Electrical Engineering Professional Subjects 11. Copper loss of a transformer are determined by means of a/an ________ test. A. Open-circuit B. Polarity C. Short-circuit* D. Inductive-circuit 12. Two magnetically coupled coils have mutual flux Φ11 and Φ12 are 0.50 mWb and 0.75 mWb respectively. If the number of turns N1 and N2 is equal to 100 and 300 respectively, what is the coefficient of coupling? A. 0.60* B. 0.50 C. 0.40 D. 0.70 13. Single-Side Band signal produces a peak to peak voltage of 720 V on voice peaks across a 75-ohm antenna. What is the peak envelope power? A. 865 W* B. 856 W C. 835 W D. 853 W 14. An induction motor draws 50 kW at a 0.60 lagging power factor from a 480 V, 60 Hz source. What parallel capacitor will increase the overall power factor to 0.90 lagging? A. 532 µF B. 489 µF* C. 704 µF D. 582 µF 15. A 69 kV three-phase transposed line is composed of one ACSR 336,400 cmil, 26/7 Linnet conductor per phase with a horizontal configuration D12 = 5 ft, D = 5 ft, and D13 = 10 ft. The conductors have a diameter of 0.721 inch and a GMR of 0.0243ft. Find the inductance per phase per kilometer of the line. A. 1.0963 mH/km B. 1.1116 mH/km* C. 1.1505 mH/km D. 1.1233 mH/km 16. A 230/115 V transformer operates on a frequency of 60 Hz. Due to an emergency, the transformer is used on a 50 Hz system. What must be the voltage be such that the magnetic flux in 60 Hz is the same as that of the 50 Hz? A. 191.67 V* B. 276 V C. 138 V D. 154 V 17. What is/are the main reason/s for using high voltage in transmission of power in the grid system? I. To transmit bulk power with minimum line losses II. Increase system reliability A. II only B. Both I and II C. Either I or II D. I only* 18. In an inductive circuit, capacitors are connected in _______ to improve the power factor. A. Parallel* B. Series C. Series-parallel D. Parallel-series 19. In which type of electronic communication does the information travel in two directions? A. Half duplex B. Full duplex* C. Multiplex D. Bicomm Past Board Exam Questions in Electrical Engineering Professional Subjects 20. A voltage divider of two resistors is designed with a total resistance of the two resistors equal to 50 ohms. If the output voltage is 10% of the input voltage, what are the values of the two resistors in the circuit? A. 49.5 and 0.5 ohms B. 40 and 10 ohms C. 42.55 and 7.5 ohms D. 45 and 5 ohms* 21. In a certain area, the energy consumption is expected to double in 10 years. Assuming a simple exponential growth given by P = P0eat, what is the growth rate? A. 6.39% B. 5.39% C. 6.93%* D. 5.93% 22. Three 6.66 Ω resistors are connected wye. What is the equivalent of each delta connected resistors? A. 2.22 Ω B. 20 Ω* C. 11.54 Ω D. 10 Ω 23. A 75-watt lamp is used to illuminate a desk that is 10 ft away. What is the wattage of the lamp if it must operate 12 ft away from the desk to have the same illumination? A. 108* B. 112 C. 140 D. 241 24. A device used to measure the impurities in the insulating oil. A. Oil tester* B. Acid tester C. Frequency meter D. Ammeter 25. Which of the following insulators will be selected for high voltage applications? A. Strain type B. Disc type C. Suspension type* D. Pin type 26. The current flowing in L and C at parallel resonance are A. Zero B. Equal* C. Infinite D. Different 27. A light source located 2.75 m from a surface produces an illumination of 528 lux on that surface. Find the illumination if the distance is changed to 1.55 m. A. 298 lux B. 1,662 lux* C. 937 lux D. 168 lux 28. A delta, 3-phase, 4-wire secondary of 230/115 V would have a high-leg neutral voltage of ________. A. 208 V B. 230 V C. 277 V D. 199 V* 29. For an unbalanced load, which connection is suitable? A. 3-wire open delta B. 4-wire wye connection* C. 3-wire delta connection D. 3-wire wye connection Past Board Exam Questions in Electrical Engineering Professional Subjects 30. Overhead transmission lines are protected from lightning with the use of I. Overhead grounding conductor II. Surge arresters A. I only B. II only C. Either I or II* D. Neither I nor II 31. A 200:5 current transformer is used with a 10-amps ammeter. If the meter reads 3.75 amps, determine the line current. A. 300 A B. 150 A* C. 180 A D. 45 A 32. The dc armature winding in which the coil sides are placed a pole pitch apart is called ________ winding. A. Multiplex B. Full-pitch* C. Fractional Pitch D. Pole-pitch 33. What is the equivalent of 1 + a + a^2? A. 0* B. 1 C. 1 + j D. -1 34. The specific resistance of a conductor depends on A. The dimensions of the conductor B. The nature of the material of the conductor only* C. The resistance of the conductor D. The area of the conductor 35. The load factor is A. Average Load/Installed Capacity B. Maximum Load/Average Load C. Average Load/Maximum Load* D. Connected Load/Maximum Load 36. In the transformers, A. High tension winding is used near the core* B. High tension winding is used away from the core C. Low tension winding is used near the core D. Low tension winding is used away from the core 37. The effect of series capacitor on a transmission line is to improve A. Steady state stability* B. Transient stability C. A and B both D. None of these 38. In two-wattmeter method, the reading of one of the wattmeters will be zero when A. Load in one of the phase is zero B. Power factor is unity C. Power factor is 0.5* D. Neutral is earthed 39. Two inductors when connected in series aiding has a total inductance of 40 mH. When connected in series opposing, the total inductance is 17.5 mH. What is the mutual inductance? A. 5.625 mH* B. 5.256 mH C. 5.75 mH D. 5.375 mH Past Board Exam Questions in Electrical Engineering Professional Subjects 40. A 4-pole induction motor running with 5% slip is supplied by a 60 Hz synchronous generator. Determine the speed of the motor. A. 1,674 rpm B. 1,728 rpm C. 1,710 rpm* D. 1,692 rpm 41. Five resistors are connected in parallel; 5 Ω, 10 Ω,15 Ω,20 Ω, and 25 Ω. The total resistance is A. 2.18978 Ω* B. 2.14286 Ω C. 2.18182 Ω D. 2.22222 Ω 42. What is used to prevent motorizing a generator? A. Overcurrent relay B. Undercurrent relay C. Differential relay D. Reverse power relay* 43. The electric motor generally used in household food mixer. A. Shaded Pole B. Universal* C. Split Phase D. Capacitor Start 44. A 120V. 200A single phase is supplied by a source 1000 ft. away through a copper conductor with a diameter of 0.45 in. and resistivity of 10.4 Ω-CM/ft. What voltage must the supply be? A. 140.50 V* B. 136.64 V C. 133.75 V D. 146 V 45. What type of transformer bank is used to convert 2-phase to 3-phase power? A. Wye-delta B. Scott-T* C. Delta-wye D. Delta-delta 46. By increasing the transmission voltage double of its original value, the same power can be dispatch keeping the line loss A. Equal to its original value B. Half of the original value C. Double of its original value D. One-fourth the original value* 47. In transmission systems, the weight of the copper conductor is proportional to A. E B. 1/E^2 * C. E^2 D. 1/E 48. Zero-sequence current can flow from line to transformer banks in _______ connection. A. Delta/Star B. Delta/Delta C. Star/Grounded star D. Grounded Star/Delta* Past Board Exam Questions in Electrical Engineering Professional Subjects 49. A 30-cd standard light source is compared with a lamp of unknown intensity using a grease-spot photometer. The two light sources are placed 1 m apart, and the grease spot is moved toward the standard light. When the grease spot is 25 cm from the standard light source, the illumination is equal on both sides. Where should the grease spot be placed for the illumination by the unknown light source to be exactly twice the illumination of the standard source? A. 32 cm from standard* B. 68 cm from standard C. 18 cm from standard D. 82 cm from standard 50. Gauss-Seidel method is used for A. Linear algebraic equations only* B. Linear differential equations only C. Both linear and nonlinear algebraic equations D. Both linear and nonlinear algebraic equations 51. Combined cycle power plant is used for A. Both base and peak load* B. Base load C. Peak load D. Intermediate load 52. A 15-bus system with 3 voltage-controlled bus will have a Jacobian matrix size A. 12 x 12 B. 25 x 25* C. 24 x 24 D. 11 x 11 53. Compared to Gauss-Seidel method, Newton-Raphson method takes A. Less number of iterations and more time per iteration* B. Less number of iterations and less time per iteration C. More number of iterations and more time per iteration D. More number of iterations and less tine per iteration 54. Circuit breakers are rated based on their _______ fault. A. Symmetrical* B. Line to line C. Line to ground D. Double line to ground 55. A 3Ω resistor is connected in series with a 2Ω resistor. If an 8Ω resistor is connected in parallel with the two, what is the total resistance? A. 3.0769 Ω* B. 2.6667 Ω C. 3.4286 Ω D. 3.7333 Ω 56. A 440 V, 8-pole, 50 Hz induction motor has a rotor speed of 720 rpm. What is the rotor frequency? A. 2 Hz* B. 5 Hz C. 4 Hz D. 6 Hz 57. According to ERC, the agreement between the User and the Distribution Utility which specifies the terms and conditions pertaining to the connection of the User System or Equipment to a new Connection Point in the Distribution System is A. Connection agreement* B. Supply agreement C. Distribution agreement D. Generation agreement Past Board Exam Questions in Electrical Engineering Professional Subjects 58. Wooden transmission poles are protected from termites using A. Creosote oil* B. Herbicide C. Insecticide D. Pesticide 59. Transient current in circuits are caused by A. Charge in energy stored in the inductor and capacitor* B. Charge in energy stored in the resistor C. Charge in energy stored in current source D. Charge in energy stored in voltage source 60. An 8 MVA, 69/13.2 kV transformer has a percent impedance of 6.75%. What is the actual impedance? A. 1.47015 Ω* B. 14.7015 Ω C. 147.015 Ω D. 0.147015 Ω 61. A 230 V, 3-phase, 4-wire system supplies the loads 10