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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
Air fuel ratio for idling speed of a petrol engine is approximately

0.20902777777778
0.41736111111111
0.62569444444444
0.042361111111111

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Internal Combustion Engines
The output of a diesel engine can be increased without increasing the engine revolution or size in following way

Heating incoming air
Supercharging
Feeding more fuel
Scavenging

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Internal Combustion Engines
If the ratios of all the corresponding linear dimensions are equal, then the model and the prototype are said to have

Kinematic similarity
Geometric similarity
None of these
Dynamic similarity

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Internal Combustion Engines
Excess quantities of sulphur in diesel fuel are Objectionable because it may cause the following

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Internal Combustion Engines
The thermal efficiency of a petrol engine is _________ as compared to diesel engine.

None of these
Same
Less
More

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