Practice question

On a truck with air brakes, the braking system’s air compressor:

  1. Pumps air into the air storage tanks.
  2. Fills the tires.
  3. Moves air to the back of the truck.
  4. Cleans the brakes.

Answer: A — Pumps air into the air storage tanks.

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Practice more: Indiana CDL Class A Knowledge Test 1 →