Automobile Engineering in ME
The crankcase dilution means

Dilution of mixture passing through crankcase in two stroke engines
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

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

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

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