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
3751. A nuclear power plant is invariably used as a__________?
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A. spinning reserve plant

B. peak load plant

C. stand-by plant

D. any of the above

E. base load plant
3752. Static capacitors are rated in terms of_____________?
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A. kWh

B. none of the above

C. kW

D. kVAR
3753. The area under a load curve gives__________?
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A. average demand

B. maximum demand

C. energy consumed

D. none of the above

3754. Which of the following power plants need the least period for installation ?
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A. Diesel power plant

B. Hydro-electric power plant

C. Thermal power plant

D. Nuclear power plant

3755. Which of the following devices may be used to provide protection against lightening over voltages?
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A. Horn gaps

B. Rod gaps

C. All of the above

D. Surge absorbers

3756. In _________ fuel transportation cost is least.
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A. nuclear power plants

B. None

C. steam power stations

D. diesel generating plants

3757. Different generating stations use following prime movers?
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A. any of the above

B. diesel engine

C. gas turbine

D. steam turbine

E. hydraulic turbine

3758. Direct conversion of heat into electric power is possible through__________?
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A. thermionic converter

B. fuel cell

C. all of the above

D. batteries

3759. For which of the following power plants highly skilled engineers are required for running the plants?
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A. Gas turbine power plants

B. Solar power plants

C. Nuclear power plants

D. Hydro-electric power plants

3760. Annual depreciation cost is calculated by___________?
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A. sinking fund method

B. straight line method

C. both A. and B.

D. none of the above

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

3781. Load shedding is possible through which of the following?
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A. Switching of the loads

B. Frequency reduction

C. Any of the above

D. Voltage reduction

3782. ___________ is invariably used as base load plant.
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A. Pumped storage plant

B. Nuclear power plant

C. Gas turbine plant

D. Diesel engine plant

3783. A low utilization factor for a plant indicates that
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A. plant is used for stand by purpose only

B. plant is used for base load only

C. plant is used for peak load as well as base load

D. plant is under maintenance

3784. Which of the following plants is almost inevitably used as base load plant?
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A. Pumped storage plant

B. Nuclear power plant

C. Gas turbine plant

D. Diesel engine plant

3785. Annual operating expenditure of a power plant consists of____________?
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A. semi-fixed charges

B. running charges

C. all of the above

D. fixed charges

3786. The effect of electric shock on human body depends on which of the following?
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A. voltage

B. duration of contact

C. current

D. all of the above
3787. Generators for peak load plants are usually designed for maximum efficiency at____________?
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A. 25 percent overload

B. 25 to 50 percent full load

C. full load

D. 50 to 75 percent full load
3788. Which of the following, in a thermal power plant, is not a fixed cost?
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A. Insurance charges

B. Depreciation

C. Interest on capital

D. Fuel cost
3789. Load curve is useful in deciding the_____________?
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A. operating schedule of generating units

B. sizes of generating units

C. all of the above

D. total installed capacity of the plant

3790. Air will not be the working substance in which of the following?
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A. Petrol engine

B. Open cycle gas turbine

C. Closed cycle gas turbine

D. Diesel engine

3791. Annual depreciation of the plant it proportional to the earning capacity of the plant vide
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A. reducing balances depreciation

B. none of the above

C. sinking fund depreciation

D. straight line depreciation

3792. _________offers the highest electric load.
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A. Vacuum cleaner

B. Washing machine

C. Toaster

D. Television set

3793. __________ industry has the least power consumption per ton of product?
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A. Caustic soda

B. Soap

C. Vegetable oil

D. Sugar

3794. In power plants insurance cover is provided for which of the following?
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A. Equipment only

B. Skilled workers only

C. All of the above

D. Unskilled workers only

3795. A load curve indicates___________?
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A. average kWh (kW) energy consumption during the period

B. average power used during the period

C. none of the above

D. either of the above

3796. Salvage value of the plant is always____________?
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A. any of the above

B. negative

C. zero

D. positive

3797. Direct conversion of heat into electrical energy is possible through____________?
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A. none of the above

B. fuel cells

C. MHD generators

D. solar cells

3798. Annual depreciation as per straight line method, is calculated by__________?
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A. the capital cost divided by number of year of life

B. increasing a uniform sum of money per annum at stipulated rate of interest

C. the capital cost minus the salvage value, is divided by the number of years of life

D. none of the above

3799. Which of the following equipment provides fluctuating load?
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A. Lathe machine

B. Exhaust fan

C. Welding transformer

D. All of the above

3800. Which of the following source of power is least reliable?
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A. Geothermal power

B. Wind power

C. Solar energy

D. iMHD