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Internal Combustion Engines

Internal Combustion Engines
The thermal efficiency of petrol and gas engines is about

0.3
0.7
0.15
0.5

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Internal Combustion Engines
The object of supercharging the engine is

To increase the power output of an engine when greater power is required
To reduce space occupied by the engine
All of these
To reduce mass of the engine per brake power

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Internal Combustion Engines
The pressure at the end of compression in the case of diesel engine is of the order of

35 kg/cm
12 kg/cm
20 kg/cm
6 kg/cm

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

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

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Internal Combustion Engines
Gaseous fuel guarantees are based on

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

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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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