Automobile Engineering in ME
The crankcase dilution means

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

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Automobile Engineering in ME
In a ventilated disc brake

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
Disc contains radial vanes between its rubbing surfaces for optimum cooling performance

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