Automobile Engineering in ME
The function of oil control rings is that it

Keeps the cylinder wall lubricated by holding oil in its channel
Prevents engine oil from going into the combustion chamber and returns excess lubricating oil off the cylinder wall through the return holes in the piston to the oil pan
Lubricates the cylinder wall by releasing oil from its hole
Maintains a seal and prevents escape of burned gases and oil leakage

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Automobile Engineering in ME
The correct flow of power through the drive train is

Engine drive shafts, clutch, main shaft, counter shaft, final driven gear, wheels
Engine main shaft, counter shaft, clutch, final driven gear, drive shafts, wheels
Engine clutch, counter shaft, main shaft, final driven gear, drive shafts, wheels
Engine clutch, main shaft, counter shaft, final driven gear, drive shafts, wheels

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