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Internal Combustion Engines

Internal Combustion Engines
The thermal efficiency of a petrol engine is _________ as compared to diesel engine.

Less
More
None of these
Same

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Internal Combustion Engines
For maximum power generation, the air fuel ratio for a petrol engine for vehicles, is of the order of

0.37569444444444
0.62569444444444
0.50069444444444
0.75069444444444

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Internal Combustion Engines
If the compression ratio of an engine working on Otto cycle is increased from 5 to 7, the percentage increase in efficiency will be

0.14
0.08
0.04
0.02

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Internal Combustion Engines
The fuels in order of decreasing knock tendency for spark ignition engines are

Paraffin, aromatic, napthene
Paraffin, napthene, aromatic
Napthene, paraffin, aromatic
Napthene, aromatics, paraffin

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Internal Combustion Engines
Diesel engine can work on very lean air fuel ratio of the order of 30: 1. A petrol engine can also work on such a lean ratio provided

Cannot work as it is impossible
Flywheel size is proper
It is properly designed
Best quality fuel is used

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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 pressure
Metacentre
Centre of buoyancy
Centre of gravity

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MORE MCQ ON Internal Combustion Engines

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