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In a cam-in-block engine, the part of the valve train riding directly on the cam is the:

A. Push rod
B. Rocker arm
C. Lifter
D. Valve

Answer :

Final answer:

In a cam-in-block engine, the lifter is the part of the valve train that rides directly on the cam, initiating motion transfer to the push rod and eventually the valve.

Explanation:

In a cam-in-block engine, the component of the valve train that rides directly on the cam is known as the lifter or tappet. This part sits between the cam lobe and the pushrod, hence converting the rotational motion of the camshaft into vertical motion which is then transferred to the pushrod.

The correct answer to the question is: C) Lifter.

While the push rod transmits the motion to the rocker arm, which then operates the valve, it is the lifter that is in direct contact with the cam and begins this chain of motion within the valve train.

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