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------------------------------------------------ Cam-in-block engines use pushrods to transmit motion from the lifters to the rocker arms.

A. Pushrods are not used in cam-in-block engines.
B. Lifters are not part of cam-in-block engines.
C. Cam-in-block engines use a different mechanism.
D. Pushrods transmit motion in cam-in-block engines.

The correct answer is d: Pushrods transmit motion in cam-in-block engines, which are a type of internal combustion engine that operates using pushrods instead of overhead cams to open and close the engine's valves during the intake, compression, power, and exhaust strokes. Therefore the correct answer is option d.

Explanation:

Cam-in-block engines, also known as pushrod engines, indeed use pushrods to transmit motion from the lifters to the rocker arms. In this type of engine, the camshaft is located within the block, rather than in the head like in overhead cam (OHC) engines. The correct answer is d: Pushrods transmit motion in cam-in-block engines.

The operation of a cam-in-block engine is part of the larger internal combustion engine process, which includes the intake, compression, power, and exhaust strokes:

(a) Air is mixed with fuel during the intake stroke.
(b) The air-fuel mixture is compressed during the compression stroke.
(c) The power stroke begins with ignition and is followed by the piston descending.
(d) Finally, the exhaust stroke expels the used gases.