Automobile Engineering in ME
The main function of a master cylinder is to

Ensure that all the wheel brakes are supplied with the same amount of fluid pressure
Boost the force applied to brake pedal
Adjust the extent of brake pedal free play
Convert brake pedal force into hydraulic pressure

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

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

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Automobile Engineering in ME
The main feature of Macpherson strut suspension is that

The assembly is slightly more complicated in design
Non vertical external forces are supported by the suspension arms
The vertical size of the suspension can be made more compact
The unsprung mass in lighter

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Automobile Engineering in ME
In a ventilated disc brake

Disc contains many small holes for optimum cooling performance
Caliper is covered with cooling fins
A duct directs air towards the caliper for cooling while the vehicle is moving
Disc contains radial vanes between its rubbing surfaces for optimum cooling performance

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