Automobile Engineering in ME
The advantage of having a tandem master cylinder arrangement in automobiles is that it

Enhances safety by activating the brakes using vacuum pressure in the event of brake fluid loss
Boosts the brake fluid pressure to reduce the force required to depress the brake pedal
Enhances safety by serving two independent lines in a divided line brake circuit
Supplies equal fluid pressure to each line of a divided line brake circuit, thereby preventing the brakes from dragging on one side

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Automobile Engineering in ME
The purpose of a cylinder head gasket is to

Prevent the combustion gases from leaking from the joint between the cylinder block and the cylinder head
Prevent engine oil from going into combustion chamber
None of these
Removes impurities from cylinder head lubricating oil

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