Automobile Engineering in ME
The battery is an electrochemical device, which means battery

Does not use an electrolyte
Makes chemicals by mechanical means
Uses chemical action to provide electricity
Has curved plates instead of flat plates

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

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

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