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Internal Combustion Engines

Internal Combustion Engines
The thermal efficiency of a standard Otto cycle for a compression ratio of 5.5 will be

1
0.5
0.25
0.7

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Internal Combustion Engines
As a result of detonation in an I.C. engine, following parameter attains very high value

Peak pressure
Rate of rise of pressure
Rate of rise of temperature
Peak temperature

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Internal Combustion Engines
The reason for supercharging in any engine is to

Effect fuel economy
Increase efficiency
Reduce weight and bulk for a given output
Increase power

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Internal Combustion Engines
A diesel engine has

3 valves
4 valves
2 valves
1 valve

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Internal Combustion Engines
In a four stroke cycle petrol engine, the pressure inside the engine cylinder during the suction stroke is __________ the atmospheric pressure.

Equal to
Above
Below
None of these

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Internal Combustion Engines
If the speed of the engine is increased, the indicated power will

Remain same
None of these
Decrease
Increase

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