electrical engineering MCQs – Page 150

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 Review each marked answer and report any item that may be outdated or unclear.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 generation 2. analog electronics 3. solid state switching circuits 4. parallel circuits 5. switchgear and protection 6. op amp circuits 7. transistor audio power amplifiers 8. electrostatics 9. heating and welding 10. multi stage transistor amplifiers 11. passive filters 12. network theorems 13. regulated d c power supply 14. a c fundamentals circuits and circuit theory 15. electromagnetic induction 16. power electronics 17. magnetism and electromagnetism 18. transformers 19. modulation and demodulation 20. d c generators 21. semiconductor theory 22. single phase induction motors 23. semiconductor diode 24. hybrid parameters 25. digital electronics 26. oscillators 27. earthing or grounding 28. single stage transistor amplifiers 29. d c motors 30. transistor biasing 31. amplifiers with negative feedback 32. basic electrical 33. electronic instruments 34. synchronous motors 35. field effect transistors fet 36. magnetic circuit 37. control systems 38. industrial drives 39. power generation 40. series parallel circuits 41. transistor tuned amplifiers 42. electrical engineering materials 43. rectifiers and converters 44. integrated circuits 45. scr silicon controlled rectifiers 46. cables 47. polyphase induction motors 48. measurement and instrumentation 49. transistors 50. electrical machine design 51. electrolysis and storage of batteries 52. electric traction 53. transmission and distribution

2981. If a step function is applied to the input of a system and the output remains below a certain level for all the time, the system is_____________?
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A. stable

B. always unstable

C. any of the above

D. unstable

E. not necessarily stable

2982. In closed loop control system, with positive value of feedback gain the overall gain of the system will______________?
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A. increase

B. any of the above

C. decrease

D. be unaffected

2983. To avoid the effect of stray magnetic field in A.C. bridges we can use_______________?
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A. magnetic screening

B. Wagner earthing device

C. any of the above

D. wave filters

2984. In Weston synchronoscope the moving coil is connected across______________?
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A. bus-bars

B. fixed coils

C. any of the above

D. incoming alternator

2985. The two pressure coils of a single phase power factor meter have_________________?
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A. the same number of turns but different dimensions

B. the same dimensions and the same number of turns

C. the same dimension but different number of turns

D. none of the above

2986. increases the steady state accuracy?
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A. Phase lag compensator

B. Integrator

C. Differentiator

D. Phase lead compensator

2987. A differential amplifier______________?
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A. has one input and one output

B. has two outputs

C. is a part of an Op-amp

D. answers (A) and (B)

2988. If an instrument has cramped scale for larger values, then it follows________________?
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A. uniform law

B. logarithmic law

C. none of the above

D. square law

2989. In a vibrating reed frequency meter the natural frequencies of two adjacent reeds have a difference of_________________?
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A. 0.1 Hz

B. 0.5 Hz

C. 1.5 Hz

D. 0.25 Hz

2990. The use of _________ instruments is merely confined within laboratories as standardizing instruments?
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A. none of the above

B. recording

C. indicating

D. integrating

E. absolute

2991. Which of the following devices may be used for extending the range of instruments ?
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A. Potential transformers

B. Current transformers

C. All of the above

D. Multipliers

E. Shunts

2992. The transfer function technique is considered as inadequate under which of the following conditions ?
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A. Systems having multiple input disturbances

B. Systems having stability problems

C. Systems having complexities and non-linearities

D. All of the above

2993. The multiplier and the meter coil in a voltmeter are in________________?
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A. parallel

B. series

C. none of the above

D. series-parallel

2994. Which of the following essential features is possessed by an indicating instrument ?
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A. All of the above

B. Deflecting device

C. Controlling device

D. Damping device

2995. In order to increase the damping of a badly underdamped system which of following compensators may be used ?
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A. Phase-lead

B. Phase-lag

C. Both A. and B.

D. Either A. and B.

E. None of the above

2996. Which of the following devices is used for conversion of co-ordinates ?
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A. Synchro-resolver

B. Microsyn

C. Synchro-transformer

D. Selsyn

2997. A certain noninverting amplifier has Ri of 1 kO and Rf of 100 kO. The closed-loop voltage gain is_____________?
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A. 100

B. 1000

C. 100,000

D. 101

2998. The horsepower of steam locomotives is______________?
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A. up to 1500

B. 3000 to 4000

C. 1500 to 2000

D. 2000 to 3000

2999. ___________From which of the following transfer function can be obtained ?
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A. None of the above

B. Signal flow graph

C. Standard block system

D. Output-input ratio

E. Analogous table

3000. Spring constant in force-voltage analogy is analogous to_____________?
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A. reciprocal of capacitance

B. resistance

C. current

D. capacitance

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