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Internal Combustion Engines

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

Compression ratio
None of these
Fuel used
Speed of engine

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Internal Combustion Engines
In loop scavenging, the top of the piston is

Contoured
Depressed
Flat
Slanted

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Internal Combustion Engines
If the temperature of intake air in internal combustion engine increases, then its efficiency will

Remain same
None of the listed here
Decrease
Increase

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Internal Combustion Engines
The reflectivity depends upon

Energy of neutrons
Properties of the reflector
Geometry of the reflector
All of these

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Internal Combustion Engines
By higher octane number of spark ignition fuel, it is meant that the fuel has

Lower volatility
Higher heating value
Higher flash point
Longer ignition delay

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

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

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