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Internal Combustion Engines

Internal Combustion Engines
The pressure at the end of compression, in petrol engines, is approximately

10 bar
35 bar
20 bar
25 bar

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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.

None of these
Above
Below
Equal to

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Internal Combustion Engines
The minimum cranking speed in case of petrol engine is about

Half the operating speed
One fourth of operating speed
250 - 300 rpm
60 - 80 rpm

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Internal Combustion Engines
The thermal efficiency of petrol and gas engines is about

0.5
0.7
0.3
0.15

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Internal Combustion Engines
The increase of cooling water temperature in petrol engine will _________ the knocking tendency.

Increase
Not effect
Decrease
None of these

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Internal Combustion Engines
The self ignition temperature of petrol is _________ as compared to diesel oil.

None of these
Higher
Same
Lower

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