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Internal Combustion Engines

Internal Combustion Engines
The firing order in an I.C. engine depends upon

Arrangement of the cylinders
Number of cylinders
Design of crankshaft
All of these

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Internal Combustion Engines
Which of the following medium is compressed in a Diesel engine cylinder?

Fuel alone
Air alone
Air and lub oil
Air and fuel

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Internal Combustion Engines
The minimum cranking speed in case of petrol engine is about

One fourth of operating speed
250 - 300 rpm
Half the operating speed
60 - 80 rpm

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Internal Combustion Engines
Compression loss in I.C engines occurs due to

Clogged air inlet slots
Leaking piston rings
All of these
Use of thick head gasket

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Internal Combustion Engines
The knocking tendency in compression ignition engines for a given fuel will be

Enhanced by decreasing compression ratio
None of these
Enhanced by increasing compression ratio
Dependent on other factors

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Internal Combustion Engines
The cam shaft of a four stroke I.C. engine running at 1500 rpm will run at

750 rpm
3000 rpm
1500 rpm
Any value independent of engine speed

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