Automobile Engineering in ME
The crankcase dilution means

Dilution of oil by water in the crankcase
Dilution of lubrication oil by fuel in the crankcase D. Dilution
Dilution of fuel in the crankcase
Dilution of mixture passing through crankcase in two stroke engines

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

Removes impurities from cylinder head lubricating oil
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
Turns oil into fine mist for spray lubrication

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Automobile Engineering in ME
The main feature of Macpherson strut suspension is that

The unsprung mass in lighter
The assembly is slightly more complicated in design
The vertical size of the suspension can be made more compact
Non vertical external forces are supported by the suspension arms

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