Automobile Engineering in ME
The function of a radiator fan in the cooling system is that

It draws heat out of the engine compartment
It is turned by wind force as the vehicle moves forward, and its rotation drives the water pump
It cools the engine by blowing air onto the cylinder block
It blows air through the radiator when necessary

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Automobile Engineering in ME
In bias ply tyres

One ply layer runs diagonally one way and another layer runs diagonally the other way
All of these
Belts of steel mesh are used in the tyres
All plies run parallel to one another

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