Internal Combustion Engines
Which of the following is false statement? Some of the methods used to reduce diesel smoke are as follows

Using additives in the fuel
Adherence to proper fuel specification
Increasing the compression ratio
Avoidance of overloading

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Internal Combustion Engines
In a four stroke cycle diesel engine, the exhaust valve

Opens at 30° after bottom dead centre and closes at 10° before top dead centre
Opens at bottom dead centre and closes at top dead centre
May open and close anywhere
Opens at 30° before bottom dead centre and closes at 10° after top dead centre

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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 flow from the main jet is diverted to the compensating jet with increase in speed
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

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