Internal Combustion Engines
Diesel fuel, compared to petrol is

Less difficult to ignite
Highly ignitable
Just about the same difficult to ignite
More difficult to ignite

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Internal Combustion Engines
The compensating jet in a carburettor supplies almost constant amount of petrol at all speeds because the

Jet area is automatically varied depending on the suction
The diameter of the jet is constant and the discharge coefficient is invariant
Flow is produced due to the static head in the float chamber
The flow from the main jet is diverted to the compensating jet with increase in speed

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Internal Combustion Engines
Scavenging air in diesel engine means

Air used for forcing burnt gases out of engine's cylinder during the exhaust period
Burnt air containing products of combustion
Air used for combustion sent under pressure
Forced air for cooling cylinder

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