Automobile Engineering in ME
In a Diesel engine, the function of a fuel injector is to

Mix the fuel and air
Ignite the air-fuel mixture
Spray atomized fuel in the cylinder
Provide flame front for ignition

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

Removes impurities from cylinder head lubricating oil
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

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