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

Removes impurities from cylinder head lubricating oil
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
None of these

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Automobile Engineering in ME
The function of a first compression ring (top ring) is that it

Maintains a seal and prevents escape of burned gases and loss of pressure in the combustion chamber
Increases the combustion temperature
Creates swirl
Maintains a seal and prevents the fuel leakage

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Automobile Engineering in ME
Wheel base of a vehicle is the

Distance between the centres of the rear tyres
Extreme length of the vehicle
Distance between the centres of the front and rear wheels
Distance between the centres of the front tyres

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Automobile Engineering in ME
The main feature of Macpherson strut suspension is that

The assembly is slightly more complicated in design
Non vertical external forces are supported by the suspension arms
The vertical size of the suspension can be made more compact
The unsprung mass in lighter

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