electrical engineering MCQs – Page 153

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 Review each marked answer and report any item that may be outdated or unclear.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
3041. The spring material used in a spring control device should have the following property?
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A. Should be non-magnetic

B. Most be of low temperature co-efficient

C. Should not be subjected to fatigue

D. Should have low specific resistance

E. All of the above
3042. The initial response when tne output is not equal to input is called_____________?
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A. Transient response

B. Dynamic response

C. Either of the above

D. Error response

3043. It is required to measure the true open circuit e.m.f. of a battery. The best device is_____________?
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A. D.C. potentiometer

B. None of the above

C. D.C. voltmeter

D. Ammeter and a known resistance

3044. The chemical effect of current is used in ______________?
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A. D.C. ammeter

B. D.C. energy meter

C. none of the above

D. D.C. ammeter hour meter
3045. Which of the following are integrating instruments ?
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A. Ammeters

B. Voltmeters

C. Ampere-hour and watt-hour meters

D. Wattmeters

3046. Two holes in the disc of energy meter are drilled at the opposite sides of the spindle to_____________?
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A. increase its braking torque

B. improve its ventilation

C. increase its deflecting torque

D. eliminate creeping at no load
3047. In a low power factor wattmeter the pressure coil is connected_______________?
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A. none of the above

B. to the load side of the current coil

C. in any of the two meters at connection

D. to the supply side of the current coil

3048. In the common mode, _______________?
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A. both inputs are grounded

B. the outputs are connected together

C. an identical signal appears on both the inputs

D. the output signal are in-phase

3049. In a system low friction co-efficient facilitates___________?
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A. reduced velocity lag error

B. increased speed of response

C. increased velocity lag error

D. reduced time constant of the system

3050. The ratio of maximum displacement deviation to full scale deviation of the instrument is called_______________?
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A. dynamic deviation

B. linearity

C. static sensitivity

D. precision or accuracy

3051. Of the values listed, the most realistic value for open-loop voltage gain of an OP-amp is________________?
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A. 1

B. 100,000

C. 2000

D. 80 dB

3052. A certain OP-amp has bias currents of 50 A. The input offset current is_________________?
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A. 99.3 A

B. 49.7 A

C. none of these

D. 700 nA
3053. In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at_____________?
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A. 0

B. 60

C. 90

D. 120
3054. The band width, in a feedback amplifier_______________?
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A. increases by the sane saaaajajt as the gain decrease

B. decreases by the same amount as the gain increase

C. remains unaffected

D. decreases by the same amount as the gain decrease

3055. Which of the following is the best method for determining the stability and transient response ?
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A. Nyquist plot

B. None of the above

C. Root locus

D. Bode plot

3056. A control system in which the control action is somehow dependent on the output is known as____________?
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A. Open system

B. Semiclosed loop system

C. None of the above

D. Closed loop system
3057. A direct current can be measured by________________?
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A. none of the above

B. a D.C. potentiometer in conjunction with a standard resistance

C. a D.C. potentiometer directly

D. a D.C. potentiometer in conjunction with a volt ratio box

3058. For measurements on high voltage capacitors, the suitable bridge is_______________?
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A. Schering bridge

B. None of the above

C. Any of the above

D. Wein bridge

E. Modified De Santys bridge

3059. A phase shifting transformer is used in conjunction with_______________?
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A. A.C. co-ordinate potentiometer

B. Drysdale potentiometer

C. Crompton potentiometer

D. D.C. potentiometer

3060. The switch board instruments________________?
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A. should be mounted in vertical position

B. either A. or B.

C. neither A. nor B.

D. should be mounted in horizontal position