Home › CDL Practice Tests › General Knowledge Questions › Question 218
You find a tire with a bulge on the sidewall during a walk-around. What does the bulge most likely mean and what should you do?
- A.A bulge is a normal molding mark
- B.The bulge will heal after the tire warms up
- C.Internal cords are broken and the tire can blow out; it must be replaced before driving
- D.The tire is simply overinflated and needs a little air let out
Correct answer
C. Internal cords are broken and the tire can blow out; it must be replaced before driving
Why
A sidewall bulge means the structure inside has failed and only the thin outer rubber is holding the pressure. Heat and flexing on the road finish the job quickly, so the tire is a replacement, not a watch-and-see item.
Manual topic: Tires - Damage · From the General Knowledge practice bank (GK-218).