power generation MCQs – Page 4

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

power generation Mcqs
61. For the same draught produced the power of induced draught fan as compared to forced draught fan is___________?
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A. not predictable

B. less

C. same

D. more
62. Reheat factor in steam turbines depends on______________?
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A. initial pressures and temperature only

B. stage efficiency only

C. exit pressure only

D. all of the above

63. Curtis turbine is_____________?
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A. velocity compounded impulse steam turbine

B. pressure compounded impulse steam turbine

C. reaction steam turbine

D. pressure velocity compounded steam turbine
64. The maximum percentage gain in Regenerative feed heating cycle thermal efficiency____________?
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A. none of the above

B. increases with number of feed heaters increasing

C. remains same unaffected by number of feed heaters

D. decreases with number of feed heaters increasing

65. The pressure on the two sides of the impulse wheel of a steam turbine_____?
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A. increases from one side to the other side

B. is different

C. is same

D. decreases from one side to the other side

66. Incase of reaction steam turbine___________?
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A. there is enthalpy drop both in fixed and moving blades

B. there is enthalpy drop only in fixed blades

C. there is enthalpy drop only in moving blades

D. none of the above

67. The draught produced by steel chimney as compared to that produced by brick chimney for the same height is_____________?
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A. same

B. less

C. more

D. may be more or less

68. Belt conveyer can be used to transport coal at inclinations upto____________?
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A. 60

B. 90

C. 80

D. 30
69. Secondary air is the air used to______________?
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A. increase the flame length

B. reduce the flame length

C. provide air round the burners for getting optimum combustion

D. transport and dry the coal

70. The efficiency of a modern boiler using coal and heat recovery equipment is about_____________?
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A. 25 to 30%

B. 40 to 50%

C. 85 to 90%

D. 65 to 70%

71. In jet type condensers___________?
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A. steam and cooling water do not mix

B. cooling water passes through tubes and steam surrounds them

C. steam passes through tubes and cooling water surrounds them

D. steam and cooling water mix
72. For Parsons reaction steam turbine, degree of reaction is____________?
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A. 60%

B. 50%

C. 75%

D. 100%

73. In a shell and tube surface condenser____________?
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A. cooling water passes through the tubes and steam surrounds them

B. all of the above varying with situation

C. steam and cooling water mix to give the condensate

D. steam passes through the cooling tubes and cooling water surrounds them

74. In a regenerative feed heating cycle, the greatest economy is affected___________?
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A. when steam is extracted from only one suitable point of steam turbine

B. when steam is extracted only from the last stage of steam turbine

C. when steam is extracted only from the first stage of steam turbine

D. when steam is extracted from several places in different stages of steam turbine
75. The maximum length of a screw conveyer is about___________?
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A. 100 metres

B. 30 metres

C. 60 metres

D. 40 metres

76. The draught in locomotive boilers is produced by_____________?
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A. forced fan

B. only motion of locomotive

C. steam jet

D. chimney

77. In a steam power plant, the function of a condenser is__________?
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A. to condense large volumes of steam to water which may be used again in boiler

B. to maintain pressure below atmospheric to increase work output from the primemover

C. to receive large volumes of steam exhausted from steam prime mover

D. all of the above
78. Rateau steam turbine is______________?
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A. pressure compounded impulse steam turbine

B. velocity compounded impulse steam turbine

C. pressure velocity compounded steam turbine

D. reaction steam turbine

79. The percentage O2 by Weight in atmospheric air is____________?
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A. 77%

B. 23%

C. 79%

D. 18%

80. In fuel cell, the ___________ energy is converted into electrical energy?
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A. heat

B. mechanical

C. chemical

D. sound