Home › CDL Practice Tests › General Knowledge Questions › Question 115
Your oil pressure gauge drops to near zero while the engine is running under load. What is the safest response?
- A.Keep driving and check the oil at the next fuel stop
- B.Stop the engine as soon as you can do so safely, because running without oil pressure can destroy the engine quickly
- C.Add water to the radiator to cool the oil
- D.Increase engine speed to raise pressure by force
Correct answer
B. Stop the engine as soon as you can do so safely, because running without oil pressure can destroy the engine quickly
Why
Oil pressure is what keeps metal parts inside the engine from grinding against each other. Losing it under load can ruin the engine in minutes, so protecting what is left of the engine comes before keeping a schedule.
Manual topic: Vehicle Systems - Engine Gauges · From the General Knowledge practice bank (GK-115).