Automobile Engineering in ME
The main purpose of an engine's air cleaner is that it

Prevents rain water from entering the engine
Prevents dust and other foreign matter from entering the engine
Controls the engine's air intake volume
Reduces the engine's air intake noise

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

Boosts the brake fluid pressure to reduce the force required to depress the brake pedal
Enhances safety by activating the brakes using vacuum pressure in the event of brake fluid loss
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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