Automobile Engineering in ME
The purpose of a balancer shaft is to

Reduce vibrations caused by the crankshaft rotation
Balance the timing in the movement of the two groups of pistons
Increase inertia force of the rotating crankshaft
Adjusts the timing of the intake and exhaust valve openings

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

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Automobile Engineering in ME
The path taken by intake air is

Air cleaner carburettor (or throttle body) intake manifold intake ports cylinders
Air cleaner intake manifold carburettor (or throttle body) intake ports cylinders
Carburettor (or throttle body) air cleaner intake manifold intake ports cylinders
Air cleaner carburettor (or throttle body) intake ports intake manifold cylinders

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