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Internal Combustion Engines

Internal Combustion Engines
A diesel engine has

3 valves
1 valve
2 valves
4 valves

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

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

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Internal Combustion Engines
The reason for supercharging in any engine is to

Reduce weight and bulk for a given output
Effect fuel economy
Increase efficiency
Increase power

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Internal Combustion Engines
A heat engine utilizes the

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

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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

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

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Internal Combustion Engines
The colour of exhaust from diesel engine is generally

White
Black
Bluish
Violet

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MORE MCQ ON Internal Combustion Engines

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