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Internal Combustion Engines

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
The fuel air ratio in a petrol engine fitted with suction carburettor, operating with dirty air filter as compared to clean filter will be

Lower
Remain unaffected
Higher
None of the listed here

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Internal Combustion Engines
A higher compression ratio causes

Pre-ignition
Any one of these
Acceleration in the rate of combustion
Increase in detonation

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Internal Combustion Engines
Stoichiometric ratio is

None of these
Actual air-fuel ratio for maximum efficiency
Chemically correct air-fuel ratio by weight
Chemically correct air-fuel ratio by volume

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Internal Combustion Engines
The knock in diesel engine occurs due to

Delayed burning of the first part of the charge
Instantaneous auto ignition of last part of charge
Instantaneous and rapid burning of the first part of the charge
Reduction of delay period

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Internal Combustion Engines
The actual volume of fresh charge admitted in 4-stroke petrol engine is

Equal to stroke volume
Less than stroke volume
More than stroke volume
Equal to stroke volume and clearance volume

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MORE MCQ ON Internal Combustion Engines

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