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Internal Combustion Engines

Internal Combustion Engines
Thermal efficiency of a two stroke cycle engine is ___ a four stroke cycle engine.

None of the listed here
Equal to
Greater than
Less than

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Internal Combustion Engines
The maximum propulsive efficiency of a turbojet engine is at a speed of

1000 km/h
2400 km/h
2000 km/h
3000 km/h

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Internal Combustion Engines
Gaseous fuel guarantees are based on

Calorific value of oil
High heat value of oil
Low heat value of oil
Mean heat value of oil

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

20 bar
35 bar
25 bar
10 bar

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

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

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Internal Combustion Engines
The ratio of the brake power to the indicated power is called

Overall efficiency
Indicated thermal efficiency
Mechanical efficiency
Volumetric efficiency

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