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Internal Combustion MCQ Question with Answer

Internal Combustion MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 22
The specific fuel consumption per B.P. hour for a diesel engine is about

0.2 kg
0.25 kg
0.3 kg
0.35 kg
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Question No : 23
The knock in diesel engine occurs due to

Instantaneous and rapid burning of the first part of the charge
Instantaneous auto ignition of last part of charge
Delayed burning of the first part of the charge
Reduction of delay period
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Question No : 24
If the compression ratio of an engine working on Otto cycle is increased from 5 to 7, the percentage increase in efficiency will be

2 %
4 %
8 %
14 %
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Question No : 25
The air requirement of a petrol engine during starting compared to theoretical air required for complete combustion is

More
Less
Same
May be more or less depending on engine capacity
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Question No : 26
The working cycle in case of four stroke engine is completed in following number of revolutions of crankshaft

1/2
1
2
4
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Question No : 27
The voltage required to produce a spark across the gap, between the sparking points is

2000 to 4000 volts
4000 to 6000 volts
6000 to 10,000 volts
10,000 to 12,000 volts
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Question No : 28
If the intake air temperature of I.C. engine increases, its efficiency will

Increase
Decrease
Remain same
None of these
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