Automobile Engineering in ME
The basic purpose of providing caster angle on wheels is to

Maintain directional control
Prevent uneven tyre wear
Compensate for wear in the steering linkage
Bring the road contact of the tyre under the point of load

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Automobile Engineering in ME
A worm gear is used as the pinion for the rack and pinion type of steering gearbox, because it

Makes the steering more responsive
Reduces the amount of kickback for large steering angles
Allows the steering wheel to be turned by a greater amount when steering
Improves steering comfort when steering wheel is turned to effect small changes in the direction of forward motion

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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
Reduces the stopping distance
Maintains directional control during braking by preventing the wheels from locking
Minimizes the brake fade

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