CDL General Knowledge TestDriving SafelyMedium
A commercial driver is conducting a pre-trip inspection of their vehicle and notices a small oil leak from the differential. What is the most appropriate action to take?
- AContinue the trip, but monitor the oil level closely at every stop.
- BCover the leak with a rag and duct tape to prevent further spillage and continue driving.
- CAdd differential fluid and proceed, as small leaks are common and not critical.
- DHave the leak inspected and repaired by a qualified mechanic before continuing the trip.
Show answer & explanationAnswer & explanation
Correct answer: D. Have the leak inspected and repaired by a qualified mechanic before continuing the trip.
Any oil leak, especially from critical components like the differential, can indicate a serious problem. It's crucial to have it inspected and repaired by a qualified mechanic to prevent potential component failure and ensure safe operation.
Why the other options are wrong
- A. Monitoring is insufficient; a leak indicates a problem that needs immediate attention, not just observation.
- B. This is a dangerous and ineffective temporary fix that does not address the mechanical problem and could lead to further damage or a safety hazard.
- C. Adding fluid is a temporary measure and does not resolve the underlying cause of the leak, which could worsen.
Differential Leak Action
Any oil leak from the differential, regardless of size, must be inspected and repaired by a qualified mechanic before operating the commercial vehicle.
- Indicates a potential mechanical issue.
- Can lead to component failure if ignored.
- Requires professional repair, not just monitoring or temporary fixes.
Memory trick: Don't just drive, inspect and fix, or your trip will be in a fix!