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Internal Combustion Engines

Internal Combustion Engines
High speed compression engines operate on

All of these
Otto cycle
Diesel cycle
Dual combustion cycle

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

Air alone
Air and fuel
Air and lub oil
Fuel alone

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Internal Combustion Engines
The air standard efficiency of an I.C. engine depends on

Compression ratio
Speed of engine
None of these
Fuel used

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Internal Combustion Engines
The ratio of the indicated thermal efficiency to the air standard efficiency is known as

Mechanical efficiency
Overall efficiency
Volumetric efficiency
Relative efficiency

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Internal Combustion Engines
A diesel engine has

1 valve
4 valves
3 valves
2 valves

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Internal Combustion Engines
In a cycle, the spark lasts roughly for

0.01 sec
0.1 sec
1 sec
0.001 sec

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