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Internal Combustion Engines

Internal Combustion Engines
Which of the following does not relate to a compression ignition engine?

Fuel pump
Carburettor
Governor
Fuel injector

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Internal Combustion Engines
The cam shaft of a four stroke I.C. engine running at 1500 rpm will run at

750 rpm
1500 rpm
Any value independent of engine speed
3000 rpm

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Internal Combustion Engines
Which is more viscous lube oil?

SAE 70
SAE 80
SAE 50
SEA 30

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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

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

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Internal Combustion Engines
If the compression ratio of an engine working on Otto cycle is increased from 5 to 7, the percentage increase in efficiency will be

0.02
0.08
0.04
0.14

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Internal Combustion Engines
The loud pulsating noise heard within the cylinder of an internal combustion engine is known as

Supercharging
Detonation
Pre-ignition
Turbulence

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