Automobile Engineering in ME
The function of positive crankcase ventilation (PCV) system is that it

Mixes fuel with air
Feeds blow by gases to the exhaust manifold
Returns blow by gases from the crankcase to the intake system
Promotes combustion by creating a swirling movement in the air-fuel mixture

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Automobile Engineering in ME
The lubrication oil flow in an engine is in the order as

Oil pump, oil strainer, relief valve, oil filter, cylinder block, cylinder head and oil pan
Oil strainer, oil pump, relief valve, oil filter, cylinder head, cylinder block and oil pan
Oil strainer, oil pump, relief valve, oil filter, cylinder block, cylinder head and oil pan
Oil strainer, oil filter, relief valve, oil pump, cylinder block, cylinder head and oil pan

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

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

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