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Internal Combustion Engines

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

25 bar
35 bar
20 bar
10 bar

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Internal Combustion Engines
The knocking in spark ignition engines can be reduced by

None of these
Increasing the engine speed
Retarding the spark
Both (A) and (B)

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Internal Combustion Engines
In a petrol engine, the mixture has the lowest pressure at the

Beginning of suction stroke
End of compression stroke
None of these
End of suction stroke

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Internal Combustion Engines
The air standard efficiency of an I.C. engine depends on

Speed of engine
None of these
Fuel used
Compression ratio

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Internal Combustion Engines
In petrol engines, the delay period is of the order of

0.003 second
0.004 second
0.002 second
0.001 second

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Internal Combustion Engines
Which of the following fuel has little tendency towards detonation?

Alcohol
Normal heptane
Iso-octane
Benzene

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