Automobile Engineering in ME
The engine oil viscosity is defined by ___________ ratings.

American petroleum institute (API)
Automatic transmission fluid (ATF)
Gross vehicle weight (GVW)
Society of automotive engineers (SAE)

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

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Automobile Engineering in ME
The ball joints are used on the tie rod ends, because they

Can deal with movement of the suspension both vertically and in other directions
Improve the force transmission speed
Reduce the amount of sliding resistance
Reduce the amount of noise generated

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