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Internal Combustion Engines

Internal Combustion Engines
Compression loss in I.C engines occurs due to

Clogged air inlet slots
Use of thick head gasket
All of these
Leaking piston rings

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

0.04
0.08
0.02
0.14

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Internal Combustion Engines
Crankcase explosion in I.C. engines usually occurs as

First a mild explosion followed by a bi explosion
Both mild and big explosions occurs simultaneously
Never occurs
First a big explosion followed by a mil explosion

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Internal Combustion Engines
The pressure inside the cylinder is _________ the atmospheric pressure during the exhaust stroke.

None of these
Below
Above
Equal to

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Internal Combustion Engines
The normal heptane (C₇H₁₆) is given a rating of ________ octane number.

120
100
50

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MORE MCQ ON Internal Combustion Engines

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