electrical engineering MCQs – Page 189

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 Review each marked answer and report any item that may be outdated or unclear.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
3761. Which of the following is an advantage of static capacitor for power factor improvement?
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A. Little maintenance cost

B. All of the above

C. Low losses

D. Ease in installation

3762. For a power plant which of the following constitutes running cost?
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A. All of the above

B. Cost of fuel

C. Cost of lubricants

D. Cost of wages

3763. During load shedding:
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A. system voltage is reduced

B. system frequency is reduced Efficiency is the secondary consideration in

C. some loads are switched off

D. system power factor is changed

3764. Which of the following is not necessarily an advantage of interconnecting various power stations?
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A. Increased reliability

B. Improved frequency of power supplied

C. Reduction in total installed capacity

D. Economy in operation of plants

3765. _____________can generate power at unpredictable or uncontrolled times?
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A. Wind power plant

B. Tidal power plant

C. Any of the above

D. Solar power plant

3766. Load factor of a power station is generally___________?
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A. more than unity

B. equal to zero Diversity factor is always

C. less than unity

D. equal to unity

3767. For a diesel generating station the useful life is expected to be around_________Years?
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A. 50 to 75 years

B. 20 to 50 years

C. 15 to 20 years

D. 75 to 100 years

3768. With reference to a power station which of the following is not a fixed cost?
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A. Depreciation

B. Fuel cost

C. Interest on capital

D. Insurance charges

3769. The increased load during summer months is due to____________?
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A. increased business activity

B. increased use of fans and air conditioners

C. none of the above

D. increased water supply

3770. Which of the following are not repayable after a stipulated period?
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A. Shares

B. Fixed deposits

C. Cash certificates

D. Bonds

3771. Diversity factor has direct effect on the____________?
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A. fixed cost of unit generated

B. running cost of unit generated

C. both A. and B.

D. neither A. nor B.

3772. In an interconnected system, the diversity factor of the whole system:
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A. decreases

B. none of the above

C. increases

D. remains unchanged

3773. Which of the following generating station has minimum running cost ?
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A. Nuclear

B. Diesel

C. Hydro

D. Thermal

3774. ___________ will offer the least load.
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A. Electric shaver

B. Television

C. Hair dryer

D. Vacuum cleaner

3775. Load curve of a power plant has always____________?
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A. All of these

B. negative slope

C. positive slope

D. zero slope

3776. For the same cylinder dimensions and speed, which of the following engine will produce least power?
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A. Petrol engine

B. Supercharged engine

C. Diesel engine

D. All of the above engines will equal power

3777. Which of the following is the disadvantage of static capacitor for power factor improvement?
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A. Cannot be repaired

B. All of the above

C. Easily damaged by high voltage

D. Short service life

3778. Which of the following is not a method for estimating depreciation charges?
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A. Straight line method

B. Sinking fund method

C. Halseys 5050 formula

D. Diminishing value method

3779. The primary reason for low power factor is supply system is due to installation of____________?
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A. induction motors

B. synchronous motors

C. single phase motors

D. d.c. motors

3780. A power transformer is usually rated in____________?
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A. kW

B. kVA

C. kVAR

D. kWh