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Internal Combustion Engines

Internal Combustion Engines
A diesel engine has

1 valve
3 valves
2 valves
4 valves

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Internal Combustion Engines
The knocking in diesel engines may be prevented by

All of these
Raising the compression ratio
Increasing the inlet pressure of air
Reducing the delay period

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Internal Combustion Engines
The mechanical efficiency (ηm) of the engine is given by

ηm = (B.P × I.P)/100
None of the listed here
ηm = I.P/B.P
ηm = B.P/I.P

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Internal Combustion Engines
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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Internal Combustion Engines
A gas engine has a swept volume of 300 cm3 and clearance volume of 25 cm3. Its volumetric efficiency is 0.88 and mechanical efficiency is 0.90. The volume of the mixture taken in per stroke is

248 cm3
286 cm3
252 cm3
264 cm3

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Internal Combustion Engines
The spark ignition engines are governed by

Quantitative governing
Combination of (B) and (C)
Qualitative governing
Hit and miss governing

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MORE MCQ ON Internal Combustion Engines

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