Automobile Engineering in ME
The main function of an exhaust muffler is the

Optimization of exhaust efficiency
Reduction of exhaust noise
Reduction of nitrogen oxide in the exhaust gases
Reduction of the exhaust gas volume

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

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

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