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Heat Engines MCQs | Page - 49

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.

M

Mr. Dubey • 51.43K Points
Coach

Q. 481) 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 • 51.43K Points
Coach

Q. 482) 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 • 51.43K Points
Coach

Q. 483) 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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M

Mr. Dubey • 51.43K Points
Coach

Q. 484) A 200 MW generator should be cooled by

(A) Nitrogen
(B) Hydrogen peroxide
(C) Hydrogen
(D) Water
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M

Mr. Dubey • 51.43K Points
Coach

Q. 485) Which of the following exists as highest pressure in a diesel engine

(A) Exhaust gases in silencer
(B) Lubricating oil
(C) Fuel at the time of injection
(D) Air at the end of compression stroke
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M

Mr. Dubey • 51.43K Points
Coach

Q. 486) A camshaft is not provided in case of

(A) Two stroke engines
(B) High speed engines
(C) Multicylinder engines
(D) ir cooled engines
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M

Mr. Dubey • 51.43K Points
Coach

Q. 487) The compression ratio in case of a gas turbine is of the order of

(A) 7
(B) 12
(C) 20
(D) 5
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Mr. Dubey • 51.43K Points
Coach

Q. 488) Corona is generally accompanied by a faint glow and

(A) Spark
(B) Sparking
(C) Heating of conductors
(D) Hissing noise
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M

Mr. Dubey • 51.43K Points
Coach

Q. 489) If after some use the lower part, electrodes and beathing space of a spark plug are found coated by deposits of soot and carbon, the conclusion will be

(A) Spark plug is of proper heat rating
(B) Spark advance is incorrect
(C) Spark plug is short circuited
(D) Spark plug is of too high heat rating
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M

Mr. Dubey • 51.43K Points
Coach

Q. 490) As the compression ratio increases the volumetric efficiency of air compressor

(A) Increases
(B) Decreases
(C) Does not change
(D) Unpredictable
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