Internal Combustion Engines
The ratio of the indicated thermal efficiency to the air standard efficiency is known as

Overall efficiency
Relative efficiency
Mechanical efficiency
Volumetric efficiency

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Internal Combustion Engines
Which one of the following engines will have heavier flywheel than the remaining ones?

30 kW four-stroke petrol engine running at 1500 r.p.m.
30 kW two-stroke petrol engine running at 1500 r.p.m.
30 kW four-stroke diesel engine running at 750 r.p.m.
30 kW two-stroke diesel engine running at 750 r.p.m.

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