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

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
Returns cylinder head lubricating oil to the oil pan at high speed

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Automobile Engineering in ME
The purpose of a cylinder head gasket is to

Prevent the combustion gases from leaking from the joint between the cylinder block and the cylinder head
Removes impurities from cylinder head lubricating oil
Prevent engine oil from going into combustion chamber
None of these

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