What are the alternate names for the primary and secondary reservoirs in an air brake system?
- Air chambers
- Brake chambers
- Wet tanks
- Dry reservoir ✓
Answer: D. Dry reservoir
The primary and secondary reservoirs are also called dry tanks, or a dry reservoir.
Why this is the answer
The handbook describes the supply tank as the wet tank and says the primary and secondary air tanks are dual-service tanks. It adds that these are called dry tanks because they collect less moisture than the supply tank. A later diagram labels them as primary and secondary dry tanks. That makes dry reservoir the matching alternate name, not the wet supply tank.
Why the other answers are wrong
- A. Air chambers — Air chambers is not the handbook's alternate name for the primary and secondary reservoirs, which the passages call dry tanks.
- B. Brake chambers — Brake chambers is not the alternate name for these reservoirs; the passages describe them as dry tanks.
- C. Wet tanks — Wet tanks is the name for the supply tank, not the primary and secondary tanks, which the passages call dry tanks.
Remember it
Remember it this way: the supply tank is wet, and the two service tanks after it are dry.