Practice question

One function of the emergency air line is to:

  1. Control the emergency brakes.
  2. Flash when air pressure is below a certain psi.
  3. Allow for quick turning.
  4. Control the ability to maneuver during bad weather conditions.

Answer: A — Control the emergency brakes.

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

Practice more: New York CDL Double Test 2 →