Automobile Engineering in ME
The aluminium alloy is used in cylinder blocks because

It does not require any cylinder liners
Material cost is low
The piston is also made of aluminium alloy
It is lighter and has good heat dissipation characteristics

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Automobile Engineering in ME
The purpose of a cylinder head gasket is to

None of these
Prevent the combustion gases from leaking from the joint between the cylinder block and the cylinder head
Prevent engine oil from going into combustion chamber
Removes impurities from cylinder head lubricating oil

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