electrical engineering MCQs – Page 159

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 Review each marked answer and report any item that may be outdated or unclear.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

3161. Regenerative feedback implies feedback with_______________?
0

A. oscillations

B. step input

C. positive sign

D. negative sign

3162. A signal other than the reference input that tends to affect the value of controlled variable is known as_________________?
0

A. command

B. disturbance

C. control element

D. reference input

3163. E.m.f. of a Weston cell is accurately measured by________________?
0

A. electrodynamic voltmeter

B. isothermal voltmeter

C. electrostatic voltmeter

D. hot wire voltmeter

3164. The phase lag produced by transportation relays_____________?
0

A. is independent of frequency

B. decreases linearly with frequency

C. increases linearly with frequency

D. is inversehproportional to frequency

3165. Instrument transformers are_______________?
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A. potential transformers

B. current transformers

C. both A. and B.

D. power transformers

3166. The rectifier instrument is not free from_______________?
0

A. wave shape error

B. all of the above

C. temperature error

D. frequency error

3167. An automatic toaster is a ___________ loop control system?
0

A. closed

B. any of the above

C. partially closed

D. open

3168. In a control system integral error compensation _________________ steady state error?
0

A. increases

B. any of the above

C. minimizes

D. does not have any effect on

3169. Wattmeter cannot be designed on the principle of_________________?
0

A. electrostatic instrument

B. moving iron instrument

C. electrodynamic instrument

D. thermocouple instrument

3170. Alternating current is measured by_______________?
0

A. induction ammeter

B. permanent magnet type ammeter

C. moving iron repulsion type voltmeter

D. electrostatic ammeter

3171. A control system working under unknown random actions is called______________?
0

A. adaptive control system

B. digital data system

C. stochastic control system

D. computer control system

3172. In a system zero initial condition means that______________?
0

A. The system is at rest and no energy is stored in any of its components

B. The system is working with zero reference signal

C. The system is working with zero stored energy

3173. For measurement of mutual inductance we can use________________?
0

A. Heaviside bridge

B. Anderson bridge

C. Maxwells bridge

D. Any of the above

3174. For handling greater currents induction wattmeters are used in conjunction with______________?
0

A. none of the above

B. potential transformers

C. power transformers

D. either of the above

E. current transformers

3175. For measuring current at high frequency we should use_______________?
0

A. thermocouple instrument

B. electrostatic instrument

C. moving iron instrument

D. none of the above

3176. Transfer function of a system is used to calculate which of the following ?
0

A. The order of the system

B. The time constant

C. The output for any given input

D. The steady state gain

3177. A conditionally stable system exhibits poor stability at______________?
0

A. low frequencies

B. increased values of open loop gain

C. none of the above

D. reduced values of open loop gain

3178. Various adjustments in an energy meter include_______________?
0

A. overload and voltage compensation

B. temperature compensation

C. light load or friction

D. lag and creep

E. all of the above

3179. Which of the following should be done to make an unstable system stable ?
0

A. The number of zeros to the loop transfer function should be increased

B. The number of poles to the loop transfer function should be increased

C. The gain of the system should be increased

D. The gain of the system should be decreased

3180. Which of the following statements is not necessarily correct for open control system ?
0

A. Input command is the sole factor responsible for providing the control action

B. Presence of non-linearities causes malfunctioning

C. Less expensive

D. Generally free from problems of non-linearities

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