Automobile Engineering in ME
Wheel base of a vehicle is the

Distance between the centres of the front and rear wheels
Extreme length of the vehicle
Distance between the centres of the front tyres
Distance between the centres of the rear tyres

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Automobile Engineering in ME
In a ventilated disc brake

Disc contains radial vanes between its rubbing surfaces 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 many small holes for optimum cooling performance

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