Q. Scavenging air in diesel engine means
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Correct Answer: (D)
air used for forcing burnt gases out of engine's cylinder during the exhaust period
Internal Combustion Engines (I.C. Engines) MCQs | Page - 1
Dear candidates you will find MCQ questions of Internal Combustion Engines (I.C. 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.
Q. Does the supply of scavenging air at a density greater than that of atmosphere mean engine is supercharged?
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Correct Answer: (B)
no
Q. The ratio of indicated thermal efficiency to the corresponding air standard cycle efficiency is called
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Correct Answer: (C)
relative efficiency
Q. Compression ratio of LC. Engines is
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Correct Answer: (A)
the ratio of volumes of air in cylinder before compression stroke and after compression stroke
Q. A perfect engine works on the Carnot cycle between 727 °C and 227°C. The efficiency of the engine is
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Correct Answer: (A)
0.5
Q. The air standard Otto cycle consists of
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Correct Answer: (A)
two constant volume and two isentropic processes
Q. In air standard Diesel cycle at fixed r and fixed n
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Correct Answer: (B)
Ζthermal decreases with increase in heat addition and cut-off ratio
Q. Mean effective pressure of Otto cycle is
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Correct Answer: (B)
directly proportional to pressure ratio
Q. For a given compression ratio the work output of Otto cycle is
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Correct Answer: (A)
increases with Increase in r
Q. For a given value of r, efficiency of Otto cycle
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Correct Answer: (B)
increases with compression ratio
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