When there are visible signs warning of a possible wheel, hub, or bearing failure, what sort of defect is it considered?
- None
- Minor
- Inconsequential
- Major ✓
Answer: D. Major
Visible signs of a possible wheel, hub or bearing failure are treated as a major defect.
Why this is the answer
The handbook says the inspection schedule sorts defects into just two groups, major and minor. When something is a minor defect, you record it on the report and tell the operator, and you can keep driving. A major defect is different: you are not allowed to drive the vehicle with one, and major defects must be repaired before the trip continues. A wheel, hub or bearing that shows warning signs is a wheel-end problem, so it belongs in the group that keeps the truck parked until it is fixed.
Why the other answers are wrong
- A. None — The handbook does not treat defects as nothing at all — any safety defect found on inspection or during the trip has to be reported to the operator.
- B. Minor — A minor defect is one you record and report but may still drive with, so it does not fit a wheel-end problem serious enough to warn of failure.
- C. Inconsequential — Inconsequential is not one of the two defect categories in the inspection schedule, which divides defects into major and minor only.
Remember it
Picture the wheel coming off: anything warning of a wheel, hub or bearing failure keeps the truck parked until it is repaired.
Official handbook: Official MTO Truck Handbook, Daily trip inspection — classes A and D