electrical engineering MCQs – Page 24

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 Review each marked answer and report any item that may be outdated or unclear.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

461. Bucket elevators are used for___________?
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A. carrying coal in horizontal direction

B. carrying coal in vertical direction

C. carrying coal in any direction

462. For a transformer, operating at constant load current, maximum efficiency will occur at______________?
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A. unity power factor

B. 0.8 lagging power factor

C. 0.8 leading power factor

D. zero power factor

463. In a regenerative surface condenser_____________?
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A. there are three pumps to remove air, vapour and condensate

B. there is no pump, the condensate gets removed by gravity

C. there are two pumps to remove air and condensate

D. there is one pump to remove air and condensate

464. For the parallel operation of single phase transformers it is necessary that they should have___________?
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A. same efficiency

B. same number of turns on the secondary side.

C. same polarity

D. same kVA rating

465. By which of the following a bus-bar is rated?
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A. Current, voltage and frequency

B. Current only

C. Current and voltage

D. Current, voltage, frequency and short time current

466. The steel used in steel cored conductors is usually__________?
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A. all of the above

B. mild steel

C. alloy steel

D. stainless steel

E. high speed steel

467. Which of the following generating station has minimum running cost?
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A. Thermal

B. Diesel

C. Hydro

D. Nuclear

468. Which of the following load is responsible for lower power factor of supply system__________?
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A. induction motors

B. synchronous Motors

C. all of the above

D. resistive loads

469. The underground system cannot be operated above_________________?
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A. 33 kV

B. 440 V

C. 66 kV

D. 11 kV

470. Which of the following Power Plant causes least environmental pollution____________?
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A. Thermal Power Plant

B. Nuclear Power Plant

C. Diesel Power Plant

D. Hydro Power Plant

471. In the analysis of which of the following lines shunt capacitance is neglected?
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A. Long transmission lines

B. Short transmission lines

C. Medium as well as long transmission lines

D. Medium transmission lines

472. Owing to skin effect:
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A. portion of the conductor near the surface carries more current and core of the conductor carries less current

B. portion of the conductor near the surface carries less current and core of the conductor carries more current

C. none of the above

D. current flows through the half cross-section of the conductor

E. any of the above

473. Load carrying capacity of belt conveyor is about___________?
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A. 50 to 100 tonnes/hr

B. 150 to 200 tonnes/hr

C. 100 to 150 tonnes/hr

D. 20 to 40 tonnes/hr

474. For transmission of power over a distance of 500 km, the transmission voltage should be in the range?
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A. 150 to 220 kV

B. 20 to 50 kV

C. 60 to 100 kV

D. 100 to 120 kV

475. Rankine cycle operating on low pressure limit of p1 an 1 high pressure limit of p2__________?
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A. has same thermal efficiency as carnot cycle operating between same pressure limits

B. has lower thenal efficiency than carnot cycle operating between same pressure limit?

C. has higher the renal efficiency than the carnot cycle operating between same pressure limits

D. may be more or less depending upon the magnitude of p1 and p2

476. The effect of considering friction losses in steam nozzle for the same pressure ratio leads to________?
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A. decrease in exit velocity from the nozzle

B. no change in exit velocity from the nozzle

C. increase in exit velocity from the nozzle

D. increase or decrease depending upon the exit quality of steam

477. The draught produced by steel chimney as compared to that produced by brick chimney for the same height is_____________?
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A. may be more or less

B. more

C. same

D. less

478. Example of overfeed type stoker is___________?
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A. chain grate

B. travelling grate

C. all of the above

D. spreader

479. The main source of production of biogas is__________________?
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A. wet livestock waste

B. human waste

C. wet cow dung

D. all above

480. The voltage transformation ratio of a transformer is equal to the ratio of_______________?
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A. secondary current to primary current

B. secondary terminal voltage to primary applied voltage

C. secondary induced e.m.f. to primary induced e.m.f

D. primary turns to secondary turns

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