electrical engineering MCQs – Page 64

Practise multiple-choice questions from electrical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

electrical engineering Mcqs
1. economics of power generation2. analog electronics3. solid state switching circuits4. parallel circuits5. switchgear and protection6. op amp circuits7. transistor audio power amplifiers8. electrostatics9. heating and welding10. multi stage transistor amplifiers11. passive filters12. network theorems13. regulated d c power supply14. a c fundamentals circuits and circuit theory15. electromagnetic induction16. power electronics17. magnetism and electromagnetism18. transformers19. modulation and demodulation20. d c generators21. semiconductor theory22. single phase induction motors23. semiconductor diode24. hybrid parameters25. digital electronics26. oscillators27. earthing or grounding28. single stage transistor amplifiers29. d c motors30. transistor biasing31. amplifiers with negative feedback32. basic electrical33. electronic instruments34. synchronous motors35. field effect transistors fet36. magnetic circuit37. control systems38. industrial drives39. power generation40. series parallel circuits41. transistor tuned amplifiers42. electrical engineering materials43. rectifiers and converters44. integrated circuits45. scr silicon controlled rectifiers46. cables47. polyphase induction motors48. measurement and instrumentation49. transistors50. electrical machine design51. electrolysis and storage of batteries52. electric traction53. transmission and distribution
1261. An over excited synchronous motor on no load is known as__________?
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A. synchronous condenser

B. generator

C. induction motor

D. alternator

1262. In two part tariff, variation in load factor will affect____________?
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A. fixed charges

B. operating or running charges

C. both A. and (b)

D. either A. or (b)

1263. Which of the following are not repayable after a stipulated period?
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A. Shares

B. Cash certificates

C. Bonds

D. Fixed deposits

1264. Superposition theorem can be applied only to circuits having____________?
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A. resistive elements

B. passive elements

C. linear bilateral elements

D. non-linear elements

1265. Which lightening stroke is most dangerous?
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A. Indirect stroke on conductor

B. Direct stroke on tower top

C. Direct stroke on line conductor

D. Direct stroke on ground wire

1266. To limit the operating temperature an electrical machine should have proper____________?
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A. power factor

B. voltage rating

C. current rating

D. speed

1267. The efficiency of a plant is of least concern when it is selected as___________?
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A. casual run plant

B. peak load plant

C. base load plant

D. either A. or (b)
1268. The switching function of semiconductor devices can be characterized with____________?
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A. Frequency only

B. Duty ratio and frequency

C. Duty ratio only

D. Duty ratio, frequency and time delay
1269. The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as___________?
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A. none of the above

B. pull-up torque

C. pull-in torque

D. pull-out torque

1270. Which of the following is non-linear circuit parameter?
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A. Transistor

B. Wire wound resistor

C. Inductance

D. Condenser

1271. The effects of EMI can be reduced by_____________?
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A. All of these

B. Reducing the susceptibility of the receptor

C. Suppressing emissions

D. Reducing the efficiency of the coupling path

1272. If resistance across LM in Fig. 2.30 is 15 ohms, the value of R is____________?
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A. 30 Q

B. 10 Q

C. 40 Q

D. 20 Q

1273. The primary reason for low power factor is supply system is due to installation of____________?
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A. d.c. motors

B. single phase motors

C. synchronous motors

D. induction motors
1274. In a synchronous motor, the armature current has large values for____________?
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A. high excitation only

B. low excitation only

C. both high and low excitation

D. none of the above

1275. The construction of a synchronous motor resembles____________?
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A. an induction motor

B. an alternator

C. a rotary converter

D. a series motor

1276. Slip rings are usually made of__________?
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A. copper or aluminium

B. silver or gold

C. carbon or graphite

D. brass or steel
1277. Synchronous motor always runs at______________?
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A. less than synchronous speed

B. the synchronous speed

C. more than synchronous speed

D. none of the above

1278. Kirchhoff s law is not applicable to circuits with____________?
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A. lumped parameters

B. non-linear resistances

C. distributed parameters

D. passive elements

1279. Load curve is useful in deciding the_____________?
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A. sizes of generating units

B. all of the above

C. operating schedule of generating units

D. total installed capacity of the plant

1280. In which of the following motors the stator and rotor fields rotate simultaneously?
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A. Universal motor

B. D.C. motor

C. Induction motor

D. Reluctance motor

E. Synchronous motor