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Internal Combustion Engines

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

0.5
0.15
0.3
0.7

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Internal Combustion Engines
In a petrol engine, the fuel supplied to the engine cylinder is mixed with required quantity of air and the mixture is ignited with a

Fuel injector
Spark plug
Fuel pump
None of these

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Internal Combustion Engines
A diesel engine has

4 valves
2 valves
3 valves
1 valve

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Internal Combustion Engines
The following volume of air is required for consuming 1 liter of fuel by a four stroke engine

5 m3
910 m3
56 m3
1 m3

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Internal Combustion Engines
Which of the following is false statement?

Oil sludge in the engine crank case
Detonation
Formation of hard coating on piston skirts
Piston ring and cylinder wear

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Internal Combustion Engines
If V₁ is the jet velocity and V₀ is the vehicle velocity, then propulsive efficiency of a turbojet engine is

V₀ / (V₀ + V₁)
2V₀ / (V₀ + V₁)
V₁ / (V₀ + V₁)
2V₁ / (V₀ + V₁)

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