AG Mechanics CDE Practice Exam

Which of the following would not be found in the crankcase?

1. breather

2. camshaft

3. crankshaft

4. oil

The correct answer is: breather

The crankcase of an engine is where the crankshaft and other internal engine components are housed. The crankshaft is what converts the piston's up and down motion into rotational motion, while the camshaft is responsible for opening and closing the engine's valves. Oil is essential for lubricating the engine and reducing friction between the moving parts. A breather, on the other hand, is an external component that is usually located on the valve cover. Its purpose is to let out any excess pressure and prevent the build-up of harmful gases within the crankcase. Therefore, the breather would not be found inside the crankcase.