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Internal Combustion Engines

Internal Combustion Engines
In diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of

500°C
2000°C
250°C
1000°C

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Internal Combustion Engines
The pressure and temperature at the end of compression stroke in a petrol engine are of the order of

4-6 kg/cm² and 200-250°C
20-30 kg/cm² and 450-500°C
12-20 kg/cm² and 350-450°C
6-12 kg/cm² and 250-350°C

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Internal Combustion Engines
The scavenging efficiency of a four stroke cycle diesel engine is

Between 95 and 100%
Below 50%
Between 85 and 95%
Between 50 and 85%

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Internal Combustion Engines
The pressure inside the cylinder is _________ the atmospheric pressure during the exhaust stroke.

None of these
Below
Equal to
Above

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Internal Combustion Engines
The size of inlet valve of an engine in comparison to exhaust valve is

More/less depending on capacity of engine
Same
More
Less

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Internal Combustion Engines
In a four stroke cycle, the minimum temperature inside the engine cylinder occurs at the

Beginning of suction stroke
End of exhaust stroke
Beginning of exhaust stroke
End of suction stroke

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