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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 : 43
The spark ignition engines are governed by

Hit and miss governing
Qualitative governing
Quantitative governing
Combination of (B) and (C)
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Question No : 44
In petrol engine, using a fixed octane rating fuel and fixed compression ratio, supercharging will _________ the knocking tendency.

Not effected
Decrease
Increase
None of these
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Question No : 45
Which of the following statement is correct regarding petrol engines?

A fine fuel spray mixed with air is ignited by the heat of compression which is at a high pressure
The fuel supplied to the engine cylinder is mixed with necessary amount of air and the mixture in ignited with the help of a spark plug
The fuel is first evaporated after passing through a carburettor and is mixed with air before ignition
All of the above
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Question No : 46
In a diesel engine, the duration between the time of injection and ignition, is known as

Pre-ignition period
Delay period
Period of ignition
Burning period
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Question No : 47
Detonation is harmful due to

Increase in the rate of heat transfer, there is a reduction in the power output and efficiency of the engine
Excessive turbulence which removes most of the insulating gas boundary layer from the cylinder walls
High intensity of knock causes crankshaft vibration and the engine runs rough
None of the above
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Question No : 48
In order to eliminate knocking in compression ignition engines, there should be

Short delay period
Late auto-ignition
Low compression ratio
High self ignition temperature of fuel
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Question No : 49
Morse test is used to determine the I.P. of a

Single cylinder petrol engine
Four stroke engine
Single cylinder diesel engine
Multi cylinder engine
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