Automobile Engineering in ME
The function of anti-lock brake system (ABS) is that is

Prevents nose dives during braking and thereby postpones locking of the wheels
Minimizes the brake fade
Reduces the stopping distance
Maintains directional control during braking by preventing the wheels from locking

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

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
Enhances safety by activating the brakes using vacuum pressure in the event of brake fluid loss

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Automobile Engineering in ME
The difference between DOT 3 and DOT 4 brake fluids is

DOT 4 fluids have a higher boiling point than DOT 3 fluid
DOT 3 and DOT 4 fluids have the same boiling point, but DOT 4 fluid has a longer service life
DOT 4 fluids have a lower boiling point than DOT 3 fluid
DOT 4 fluid is more resistant to freezing than DOT 3 fluid

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