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Internal Combustion Engines

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

Above
Equal to
Below
None of these

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Internal Combustion Engines
The effective inhibitor of pre-ignition is

Water
None of these
Lead
Alcohol

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Internal Combustion Engines
The cam shaft of a four stroke I.C. engine running at 1500 rpm will run at

1500 rpm
750 rpm
3000 rpm
Any value independent of engine speed

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Internal Combustion Engines
Iso-octane (C₈H₁₈) has octane number of

120
50
100

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

10 bar
25 bar
35 bar
20 bar

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Internal Combustion Engines
The accumulation of carbon in a cylinder results in increase of

Ignition time
Clearance volume
Volumetric efficiency
Effective compression ratio

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