electrical engineering MCQs – Page 200

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 Review each marked answer and report any item that may be outdated or unclear.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
3981. Induction cup relay is operated due to changes in________________?
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A. impedance

B. voltage

C. current

D. all of the above
3982. Distance relays are generally_____________?
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A. split-phase relays

B. none of the above

C. reactance relays

D. impedance relays

3983. The short circuit in any winding of the transformer is the result of_______________?
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A. loose connection

B. mechanical vibration

C. insulation failure

D. impulse voltage
3984. Arc in a circuit behaves as_______________?
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A. a resistance decreasing with voltage rise across the arc

B. a resistance increasing with voltage rise across the arc

C. an inductive reactance

D. a capackive reactance

3985. On which of the following routine tests are conducted ?
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A. All of the above

B. Oil circuit breakers

C. Air blast circuit breakers

D. Minimum oil circuit breakers

3986. Circuit breakers usually operate under______________?
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A. sub-transient state of short-circuit current

B. after D.C. component has ceased

C. steady state of short-circuit current

D. transient state of short-circuit current
3987. Circuit breakers are essentially____________?
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A. circuits to break the system

B. current carrying contacts called electrodes

C. any of the above

D. transformers to isolate the two systems

E. arc extinguishers

3988. Short-circuit currents are due to_______________?
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A. three phase faults

B. single phase to ground faults

C. two phase to ground faults

D. phase to phase faults

E. any of these
3989. The information to the circuit breaker under fault conditions is provided by____________?
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A. all of the above

B. relay

C. rewirable fuse

D. H.R.C. only

3990. The delay fuses are used for the protection of ___________?
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A. fluorescent lamps

B. motors

C. light circuits

D. power outlet circuits

3991. A fuse in a motor circuit provides protection against__________?
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A. overload

B. open circuit, short-circuit and overload

C. none of the above

D. short-circuit and overload
3992. Over voltage protection is recommended for______________?
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A. none of the above

B. all of the above

C. gas turbine generators

D. steam turbine generators

E. hydro-electric generators

3993. Air blast circuit breaker is used for_____________?
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A. over currents

B. short duty

C. intermittant duty

D. repeated duty
3994. The fuse rating is expressed in terms of_____________?
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A. voltage

B. kVA

C. VAR

D. current
3995. relay is preferred for phase fault on short transmission line?
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A. Reactance

B. None of the above

C. Induction type

D. Impedance

3996. relays are used for phase faults on long line?
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A. Reactance

B. Impedance

C. None of the above

D. Either of the above

3997. A balanced 3-phase system consists of_______________?
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A. zero, negative and positive sequence currents

B. zero sequence currents only

C. positive sequence currents only

D. negative and zero sequence currents

3998. Overfluxing protection is recommended for_____________?
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A. generator transformer of the power plant

B. station transformer of the power plant

C. distribution transformer

D. auto-transformer of the power plant

3999. A fuse is never inserted in____________?
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A. phase dine

B. neutral wire

C. positive of D.C. circuit

D. negative of D.C. circuit

4000. Interruption of large currents by relay requires______________?
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A. wide separation of the opened contacts

B. all of the above

C. high speed opening of contacts

D. arc suppressing blow out coils