CDL Air Brakes TestAir Brake System PartsHard

A driver is inspecting the air storage tanks on a commercial vehicle. They notice significant rust and pitting on the exterior of one of the tanks. What is the most appropriate action the driver should take?

  1. ANote the observation and continue the inspection, as surface rust is common.
  2. BSchedule the vehicle for immediate inspection by a qualified mechanic to assess tank integrity.
  3. CDrain the tank completely and re-check for leaks after refilling.
  4. DApply rust-inhibiting paint to the affected area immediately.
Show answer & explanation

Correct answer: B. Schedule the vehicle for immediate inspection by a qualified mechanic to assess tank integrity.

Significant rust and pitting on an air tank can compromise its structural integrity, potentially leading to a rupture. This is a serious safety concern that requires immediate professional assessment.

Why the other options are wrong

  • A. While minor surface rust might be common, 'significant rust and pitting' indicates potential structural damage, which cannot be ignored.
  • C. Draining and refilling the tank would not resolve the issue of compromised structural integrity and could even exacerbate a hidden weakness.
  • D. Applying paint is a cosmetic fix and does not address the underlying structural integrity issue caused by corrosion.

Air Storage Tank Corrosion

Deterioration of air tank material (typically steel) due to rust and pitting, which can weaken the tank and lead to dangerous failure under pressure.

  • Caused by moisture accumulation and environmental exposure.
  • Interior corrosion is often worse than exterior.
  • Compromises tank integrity and safety.
  • Requires professional inspection and potential replacement.

Memory trick: Rust on the tank, a dangerous prank, get it checked by a mechanic, or you're in a panic.

More Air Brake System Parts questions