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

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

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Automobile Engineering in ME
Wheel base of a vehicle is the

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

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Automobile Engineering in ME
The lubrication oil flow in an engine is in the order as

Oil pump, oil strainer, relief valve, oil filter, cylinder block, cylinder head and oil pan
Oil strainer, oil pump, relief valve, oil filter, cylinder head, cylinder block and oil pan
Oil strainer, oil filter, relief valve, oil pump, cylinder block, cylinder head and oil pan
Oil strainer, oil pump, relief valve, oil filter, cylinder block, cylinder head and oil pan

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