What is the function of the camshaft? A. To distribute the lubricating oil. B. To drive the crankshaft. C. To operate the injectors D. To operate the valves.

The correct answer is D. The function of the camshaft is to operate the valves. The camshaft is a crucial component in internal combustion engines. It is connected to the crankshaft and rotates with it. The camshaft has lobes or cams that push against the valve lifter or rocker arms, causing the valves to open and close at the correct times. This ensures that the engine's cylinders receive the appropriate amount of air and fuel and that exhaust gases are expelled efficiently.