Practice question

Air tank drains:

  1. Allow rain water to enter the tank.
  2. Are used to drain water and compressor oil from the air tank.
  3. Should never be opened.
  4. Must remain open during transit.

Answer: B — Are used to drain water and compressor oil from the air tank.

The correct answer is shown above. Try the full quiz for additional practice.

Practice more: Texas CDL Class B Knowledge Test 2 →