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

Lubricates the cylinder wall by releasing oil from its hole
Keeps the cylinder wall lubricated by holding oil in its channel
Maintains a seal and prevents escape of burned gases and oil leakage
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

ANSWER DOWNLOAD EXAMIANS APP

Automobile Engineering in ME
It is necessary to maintain the valve clearances as they

Reduce the resistance to sliding that occurs between the cam and the tappet
Make the crankshaft turn smoothly
Increase the speed at which the valves move up and down
Allow for lengthening of the valves owing to the heat of combustion

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Automobile Engineering in ME