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Internal Combustion Engines

Internal Combustion Engines
High speed compression engines operate on

Dual combustion cycle
Otto cycle
Diesel cycle
All of these

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Internal Combustion Engines
The air standard efficiency of an I.C. engine is given by (where r = Compression ratio, and γ = Ratio of specific heats)

1 - rγ - 1
1 + rγ - 1
1 - (1/rγ - 1)
None of these

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Internal Combustion Engines
The object of providing masked inlet valve in the air passage of compression ignition engines is to

Enhance flow rate
Control air flow
Induce primary swirl
Induce secondary turbulence

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Internal Combustion Engines
The ratio of the brake power to the indicated power is called

Indicated thermal efficiency
Volumetric efficiency
Overall efficiency
Mechanical efficiency

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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

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

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

0.25069444444444
0.37569444444444
0.62569444444444
0.50069444444444

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