Automobile Engineering in ME
The main function of a master cylinder is to

Ensure that all the wheel brakes are supplied with the same amount of fluid pressure
Boost the force applied to brake pedal
Convert brake pedal force into hydraulic pressure
Adjust the extent of brake pedal free play

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Automobile Engineering in ME
A basic difference between the spark ignition engine and the Diesel engine is that the

Fuel is sprayed into the combustion chamber in the Diesel engine as the piston nears T.D.C. on the compression stroke
Air temperature ignites the fuel in the Diesel engine
All of these
Diesel engine compresses air alone instead of an air-fuel mixture

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