Red Seal Agricultural Equipment Technician Practice Exam

What is one common cause of engine overheating?

1. High fuel levels

2. Low coolant levels

3. Over-inflated tires

4. Excessive RPMs

The correct answer is: Low coolant levels

Low coolant levels are a common cause of engine overheating because the cooling system relies on coolant to absorb and dissipate heat generated by the engine during operation. When the coolant level is low, there is insufficient liquid to efficiently transfer heat away, which can lead to the engine operating at higher temperatures than normal. This can ultimately result in serious engine damage if not addressed promptly. In contrast, high fuel levels may affect engine performance and emissions, but they do not directly contribute to overheating. Over-inflated tires could impact traction and handling but do not influence engine temperature. Excessive RPMs can increase engine load and heat production, but the effectiveness of the cooling system, which is directly related to coolant levels, plays a more significant role in managing the engine's temperature. Thus, maintaining proper coolant levels is essential for preventing overheating.