Question 5212
What is the main purpose of the coolant?
- For the vehicle to have air conditioning.
- For the vehicle to have heating.
- To cool the vehicle's engine.
Show answer and explanation
Correct answer: To cool the vehicle's engine.
Coolant absorbs heat from the engine as it flows through its parts and releases it in the radiator, where it cools before returning. This keeps the engine at its operating temperature and prevents overheating. The heater uses that heat, but that is not the coolant's main purpose, and the air conditioning cools using a separate gas. In the image, someone tops up the expansion tank with pink coolant.