Answer :
Final answer:
The component not part of the valve train is the crankshaft. The valve train includes parts like the camshaft, rocker arms, and valve springs, while the crankshaft converts linear piston motion into rotation and is essential for engine operation but not part of the valve train system. The correct option is B.
Explanation:
Out of the components listed, the one that is not part of the valve train in an engine is (b) crankshaft. The valve train includes various components that control the operation of the valves in an internal combustion engine. The camshaft operates the followers, whose heights are determined by a function controlled by the shape of the cam, to open and close the valves at the correct times.
The crankshaft, on the other hand, converts the reciprocating linear piston motion into rotation. It is tied mechanically to the pistons via piston rods, but it is not directly involved in the operation of the valves. The rocker arms and valve springs are part of the mechanism that operates the intake and exhaust valves. Therefore, the crankshaft is essential for engine operation, but it is not a component of the valve train.
