Prepare effectively for the AG Mechanics CDE exam with our engaging quiz. Featuring multiple-choice questions and detailed explanations, you can increase your knowledge of agricultural mechanics and develop the skills necessary for success in the competition.

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The camshaft opens and closes the:

  1. breather

  2. intake valve

  3. exhaust valve

  4. both B and C

The correct answer is: both B and C

The camshaft is responsible for controlling the opening and closing of the intake and exhaust valves. The breather is a separate component in the engine that helps regulate air flow. So, options A, B, and C are incorrect because they all refer to individual components, while the camshaft controls both the intake and exhaust valves simultaneously. Option D, on the other hand, correctly states that the camshaft is responsible for opening and closing both the intake and exhaust valves.