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

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

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Automobile Engineering in ME
The crankcase dilution means

Dilution of mixture passing through crankcase in two stroke engines
Dilution of lubrication oil by fuel in the crankcase D. Dilution
Dilution of oil by water in the crankcase
Dilution of fuel in the crankcase

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