Home › CDL Practice Tests › General Knowledge Questions › Question 123
Which under-hood finding best explains an engine that overheats only after a few miles of driving?
- A.A clean air filter element
- B.A loose, cracked, or glazed drive belt that can no longer turn the water pump and fan properly
- C.A full windshield washer bottle
- D.A tightly sealed fuel cap
Correct answer
B. A loose, cracked, or glazed drive belt that can no longer turn the water pump and fan properly
Why
The belt drives the water pump and, on many engines, the fan that pulls air through the radiator. A belt that slips under load lets coolant circulation and airflow fall behind heat production, so temperature climbs as the drive continues.
Manual topic: Vehicle Systems - Belts and Cooling · From the General Knowledge practice bank (GK-123).