Heat Engines MCQs | Page - 48

Dear candidates you will find MCQ questions of Heat Engines here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.

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Mr. Dubey • 97.86K Points
Coach

Q. Which of the following chemical acts as anti-freeze?

  • (A) Naphtha
  • (B) Glycol
  • (C) Ethyl alcohol
  • (D) Lead acetate
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M

Mr. Dubey • 97.86K Points
Coach

Q. A low pressure accumulator is generally used with which of the following turbine

  • (A) Mixed pressure turbine
  • (B) Back pressure turbine
  • (C) Impulse turbine
  • (D) Condensing turbine
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M

Mr. Dubey • 97.86K Points
Coach

Q. Which is not the cause for loss of heat in boiler due to incomplete combustion?

  • (A) Under cooling of furnace at low ratings
  • (B) Improper secting of boiler
  • (C) Insufficient air supply
  • (D) Boiler drum uninsulated
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M

Mr. Dubey • 97.86K Points
Coach

Q. Temporary hardness of water is caused by

  • (A) Bicarbonates of calcium and magnesium
  • (B) Sulphates of calcium and magnesium
  • (C) Chlorides of calcium and magnesium
  • (D) Nitrates of calcium and magnesium
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M

Mr. Dubey • 97.86K Points
Coach

Q. Crankcase explosion occurs in

  • (A) Four stroke SI engines
  • (B) Four stroke Cl engines
  • (C) Two stroke Cl engines
  • (D) Two stroke SI engines
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M

Mr. Dubey • 97.86K Points
Coach

Q. Which of the following offers best resistance to knocking in S.I. engines?

  • (A) Aromatics
  • (B) Paraffins
  • (C) Carbon dioxide
  • (D) Naphthenes
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M

Mr. Dubey • 97.86K Points
Coach

Q. Which of the following engine can work on very lean mixture?

  • (A) Petrol engine
  • (B) Diesel engine
  • (C) Two stroke engine
  • (D) Wankel engine
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M

Mr. Dubey • 97.86K Points
Coach

Q. Overall thermal efficiency of a thermal power plant is

  • (A) Carnot cycle efficiency
  • (B) 50 to 70% of theoretical efficiency
  • (C) Product of boiler efficiency, turbine efficiency and generator efficiency
  • (D) Rankine cycle efficiency
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M

Mr. Dubey • 97.86K Points
Coach

Q. In gas and petrol engines thermal efficiency may be expected in the range

  • (A) 50 percent
  • (B) 30 to 35 percent
  • (C) 10 - 15 percent
  • (D) 15 to 25 percent
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