Automobile Engineering in ME
In a ventilated disc brake

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

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Automobile Engineering in ME
The starting system includes

A battery, a starter, and a distributor
A distributor, a starter, and an ignition switch
A battery, a starter, and an ignition switch
A battery, a distributor, and an ignition switch

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