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Internal Combustion Engines

Internal Combustion Engines
Combustion in compression ignition engines is

Homogeneous
Heterogeneous
Both (A) and (B)
Laminar

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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

None of these
Fuel pump
Spark plug
Fuel injector

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

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

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Internal Combustion Engines
The air-fuel ratio in petrol engines is controlled by

Injection
Governing
Controlling valve opening/closing
Carburetion

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Internal Combustion Engines
The mechanical efficiency (ηm) of the engine is given by

None of the listed here
ηm = I.P/B.P
ηm = (B.P × I.P)/100
ηm = B.P/I.P

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