Brake chambers are found on
- only the rear wheels.
- all the wheels. ✓
- all air tanks.
- only the front wheels.
Answer: B. all the wheels.
Brake chambers are found on all the wheels.
Why this is the answer
The inspection passage tells you to check the brake chambers on each side of a steering axle, so chambers are not limited to the rear. It also treats foundation brake components as the mechanical parts at the wheels that the air system operates, and the “S” cam brake passage says this common commercial foundation brake uses air brake chambers and linkage, with many parts located in the wheel. Together these passages point to brake chambers being wheel components on the vehicle’s wheels, not parts mounted on the air tanks.
Why the other answers are wrong
- A. only the rear wheels. — Brake chambers are not only at the rear, since the inspection passage refers to brake chambers on each side of a steering axle.
- C. all air tanks. — Air tanks are separate air-system components; the passages describe checking tanks for insecure mounting, not as brake chambers.
- D. only the front wheels. — They are not only at the front, because air brake chambers are part of foundation brakes at the wheels, not just the steering axle.
Remember it
Chambers live at the wheels, not on the tanks.