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Internal Combustion Engines

Internal Combustion Engines
In diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of

500°C
1000°C
250°C
2000°C

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Internal Combustion Engines
The knocking tendency in spark ignition engines may be decreased by

Controlling the exhaust temperature
Controlling the air-fuel mixture
Controlling the ignition timing
Reducing the compression ratio

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Internal Combustion Engines
Engine pistons are usually made of aluminium alloy because it

Is stronger
Is lighter
Wear is less
Absorbs shocks

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

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

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Internal Combustion Engines
In the opposed piston diesel engine, the combustion chamber is located

Below the piston
Above the piston
There is no such criterion
Between the pistons

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Internal Combustion Engines
When crude oil is heated, then which of the following hydrocarbon is given off first?

Kerosene
Natural gas
Paraffin
Gasoline

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MORE MCQ ON Internal Combustion Engines

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