power generation MCQs – Page 2

Practise focused power generation questions with marked answers for exam preparation and subject revision.

power generation Mcqs

21. A gas turbine basically work on
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A. Dual cycle

B. Rankin cycle

C. Brayton cycle

D. Carnot cycle

22. One kilowatt hour is equal to_________?
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A. 735 k cal.

B. 860 k cal.

C. 746 k cal.

D. 532 k cal.

23. The ideal load factor should be_____________?
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A. negative.

B. infinity.

C. zero

D. unity

24. Diesel power plant are generally used as___________?
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A. base load plant

B. peak load plant

C. standby plant

D. none of the above

25. The overall efficiency of a steam power station is ________ its thermal efficiency.
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A. none of the above

B. greater than

C. less than

D. equal to

26. Which of the following power plant has least efficiency_________?
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A. Steam power plant

B. Hydro power plant

C. Diesel power plant

D. Nuclear power plant

27. The fuel used in nuclear reactor is_____________?
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A. all of the above

B. cadmium

C. radium

D. uranium

28. The voltage of a single solar cells is about
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A. 1. 5 volt

B. 1 volt

C. 1.8 volt

D. 0.5 volt

29. A steam power stations basically work on the______________?
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A. thermodynamic cycle

B. Vapor pressure cycle

C. Carton cycle

D. Rankin cycle

30. The percentage 02 by volume in atmosphere air is____________?
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A. 77%

B. 79%

C. 21%

D. 23%

31. The cooling section in the surface condenser__________?
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A. does not affect vapour quantity extracted but reduces pump capacity of air extraction pump

B. increases the quantity of vapour extracted along with air

C. reduces the quantity of vapour extracted along with air

D. none of the above

32. The ratio of exit pressure to inlet pressure for maximum mass flow rate per unit area of steam through a nozzle when steam is initially dry saturated is___________?
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A. 0.555

B. 0.6

C. 0.5457

D. 0.578

33. The pressure at the furnace is minimum in case of___________?
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A. forced draught system

B. natural draught system

C. balanced draught system

D. induced draught system

34. The amount of air which is supplied for complete combustion is called___________?
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A. primary air

B. tertiary air

C. secondary air

35. Load carrying capacity of belt conveyor is about___________?
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A. 100 to 150 tonnes/hr

B. 20 to 40 tonnes/hr

C. 50 to 100 tonnes/hr

D. 150 to 200 tonnes/hr

36. The isentropic expansion of steam through nozzle for the steam initially superheated at inlet is approximated by equation__________?
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A. pv = C

B. pv1126 = C

C. pv1A = C

D. pvls=C

37. The proper indication of incomplete combustion is_______________?
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A. high CO content in flue gases at exit

B. high CO2 content in flue gases at exit

C. the smoking exhaust from chimney

D. high temperature of flue gases

38. The value of reheat factor normally varies from___________?
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A. 1.02 to 1.06

B. 0.9 to 0.95

C. 1.2 to 1.6

D. 0.5 to 0.6

39. Economiser is used to heat_____________?
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A. all above

B. air

C. feed water

D. flue gases

40. Where unpulverised coal has to be used and boiler capacity is large, the stoker which is used is______________?
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A. underfeed stoker

B. overfeed stoker

C. any

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