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Internal Combustion Engines

Internal Combustion Engines
Diesel as compared to petrol is

Less difficult to ignite
More difficult to ignite
Highly ignitable
None of these

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Internal Combustion Engines
In a four stroke cycle petrol engine, the pressure inside the engine cylinder during the suction stroke is __________ the atmospheric pressure.

Above
Below
None of these
Equal to

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Internal Combustion Engines
The output of a diesel engine can be increased without increasing the engine revolution or size in following way

Heating incoming air
Feeding more fuel
Supercharging
Scavenging

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

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

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Internal Combustion Engines
The reflectivity depends upon

Energy of neutrons
Properties of the reflector
All of these
Geometry of the reflector

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Internal Combustion Engines
The object of supercharging the engine is

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

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