AG Mechanics CDE Practice Exam

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Prepare for the AG Mechanics CDE Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

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When one end of the rocker arm is pushed up, the other end pushes down on the ____________.

  1. camshaft

  2. piston

  3. valve stem

  4. cylinder

The correct answer is: valve stem

When one end of the rocker arm is pushed up, the other end pushes down on the valve stem. The rocker arm's function is to act as a lever that transfers the motion of the camshaft to the valves in the engine. As the camshaft pushes one end of the rocker arm up, the other end moves down and pushes on the valve stem, causing the valve to open or close. This action is essential for controlling the flow of air and fuel into the combustion chamber and the exhaust gases out of the chamber. The other options are incorrect because the rocker arm does not directly interact with the camshaft, piston, or cylinder in this manner.

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