Q.1
Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A) : To ensure complete closing of the engine valve, a certain amount of clearance between the tappets and the
valve stems is necessary.
Reason (R) : If the clearance is insufficient, the valve will be held open and the leaking valve will burn. If the clearance is too
large, the valve range will be decreased and the operation of the valve will be noisy
In light of the above statements, choose the most appropriate answer from the options given below