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Internal Combustion Engines

Internal Combustion Engines
A diesel engine has compression ratio from

6 to 10
15 to 25
25 to 40
10 to 15

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Internal Combustion Engines
The theoretically correct air fuel ratio for petrol engine is of the order of

0.50069444444444
0.25069444444444
0.62569444444444
0.37569444444444

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Internal Combustion Engines
If the speed of the engine is increased, the indicated power will

None of these
Remain same
Decrease
Increase

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Internal Combustion Engines
In a petrol engine, if diesel is used, then the engine will

Explode
Run more efficiently
Not run
Run at high speed

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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

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

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Internal Combustion Engines
The fuels in order of decreasing knock tendency for spark ignition engines are

Napthene, aromatics, paraffin
Paraffin, aromatic, napthene
Paraffin, napthene, aromatic
Napthene, paraffin, aromatic

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