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Internal Combustion Engines

Internal Combustion Engines
The ignition quality of diesel oil is expressed by

Octane number
Cetane number
None of the listed here
Calorific value

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Internal Combustion Engines
During idling, a petrol engine requires _________ mixture.

Lean
Chemically correct
Rich
None of these

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Internal Combustion Engines
The fuel in diesel engine is normally injected at pressure of

60-80 kg/cm²
20-25 kg/cm²
90-130 kg/cm²
5-10 kg/cm²

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Internal Combustion Engines
When a body, floating in a liquid, is given a small angular displacement, it starts oscillating about a point known as

Centre of gravity
Metacentre
Centre of pressure
Centre of buoyancy

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

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

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Internal Combustion Engines
The ratio of indicated thermal efficiency to the corresponding air standard cycle efficiency is called

Overall efficiency
Net efficiency
Efficiency ratio
Relative efficiency

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