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Internal Combustion Engines

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

Air and lub oil
Fuel alone
Air and fuel
Air alone

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Internal Combustion Engines
The loud pulsating noise heard within the cylinder of an internal combustion engine is known as

Detonation
Supercharging
Turbulence
Pre-ignition

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Internal Combustion Engines
Which of the following fuel has little tendency towards detonation?

Alcohol
Normal heptane
Benzene
Iso-octane

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Internal Combustion Engines
The ratio of indicated thermal efficiency to the corresponding air standard cycle efficiency is called

Net efficiency
Overall efficiency
Efficiency ratio
Relative efficiency

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Internal Combustion Engines
Stoichiometric ratio is

Chemically correct air-fuel ratio by weight
Chemically correct air-fuel ratio by volume
Actual air-fuel ratio for maximum efficiency
None of these

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Internal Combustion Engines
The reflectivity depends upon

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

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