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Internal Combustion Engines

Internal Combustion Engines
Air fuel ratio at which a petrol engine cannot work is

0.41736111111111
20 : 1 and less
0.33402777777778
0.62569444444444

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Internal Combustion Engines
The brake power of a diesel engine, keeping other parameters constant, can be increased by

Decreasing the density of intake air
Increasing the temperature of intake air
Increasing the pressure of intake air
Decreasing the pressure of intake air

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Internal Combustion Engines
Alpha-methyl-naphthalene (C11H10) has a cetane number of

120
100
50
0

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Internal Combustion Engines
If one cylinder of a diesel engine receives more fuel than the others, then for that cylinder the

Exhaust will be smoky
Scavenging occurs
Piston rings would stick into piston grooves
Engine starts overheating

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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
0.14
0.04

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Internal Combustion Engines
In a naturally aspirated diesel engine, the air is supplied by

A vacuum chamber
An injection tube
A centrifugal blower
A supercharger

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MORE MCQ ON Internal Combustion Engines

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