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Internal Combustion Engines

Internal Combustion Engines
The octane number of petrol, generally available, is

60 to 80
80 to 100
20 to 40
40 to 60

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Internal Combustion Engines
The ratio of the volume of charge admitted at N.T.P. to the swept volume of the piston is called

Overall efficiency
Volumetric efficiency
Relative efficiency
Mechanical efficiency

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Internal Combustion Engines
A supercharged engine as compared to an ordinary engine

All of these
Requires smaller foundation
Is lighter
Consumes less lubricating oil

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Internal Combustion Engines
The thermal efficiency of a diesel cycle having fixed compression ratio, with increase in cut-off ratio will

May increase or decrease depending on other factors
Decrease
Be independent
Increase

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Internal Combustion Engines
The injection pressure in a diesel engine is about

500 bar
150 bar
100 bar
10 bar

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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

Higher
Lower
None of the listed here
Remain unaffected

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MORE MCQ ON Internal Combustion Engines

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