AG Mechanics CDE Practice Exam

The intake valve is cooled by:

1. antifreeze solution

2. engine oil

3. incoming air/fuel mixture

4. outgoing exhaust gases

The correct answer is: antifreeze solution

The intake valve in an engine is typically cooled by the antifreeze solution that flows through the engine's cooling system. The antifreeze absorbs heat from the engine components, including the intake valve, helping to prevent overheating and ensuring optimal performance. Engine oil is primarily responsible for lubricating moving parts, incoming air/fuel mixture doesn't play a direct role in cooling the intake valve, and outgoing exhaust gases are generally hot and not used for cooling purposes. Therefore, the correct answer is antifreeze solution.