Automobile Engineering in ME
The function of an oil control orifice is that it

Returns cylinder head lubricating oil to the oil pan at high speed
Removes impurities from cylinder head lubricating oil
Turns oil into fine mist for spray lubrication
Regulates the pressure of engine oil supplied by the oil pump for the lubrication of cylinder head mechanism and other purposes

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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
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
In radial tyres

One ply layer runs diagonally one way and another layer runs diagonally the other way
All plies run parallel to one another and vertical to tyre bead
None of these
Inner tubes are always used

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