Identify the role of the camshaft in an internal combustion engine.

• A. To control the rotation of the crankshaft
• B. To manage the timing of the ignition system
• C. To operate the intake and exhaust valves
• D. To support the engine block

Answer: (C)

The camshaft plays a critical role in an internal combustion engine by operating the intake and exhaust valves. It is responsible for opening and closing these valves at the proper times during the engine's cycle, ensuring that the engine can intake air and fuel while exhausting combustion gases effectively. The camshaft is linked to the crankshaft, and its design ensures that it rotates in synchronization with the crankshaft. This timing is crucial; if the valves are opened or closed at the wrong moments, it can lead to poor engine performance or even damage.

While controlling the rotation of the crankshaft, managing the timing of the ignition system, and supporting the engine block are also important components of engine functionality, they do not directly involve the camshaft's primary function. Therefore, the correct answer highlights the specific and vital task of the camshaft in the operation of intake and exhaust valves, which directly influences engine performance and efficiency.