If your truck has dual parking control valves, you can use pressure from a separate tank to:

Release the spring brakes to move a short distance in an emergency.. Section 5.1: Dual parking control valves allow you to release the

If your truck has dual parking control valves, you can use pressure from a separate tank to:

ANSWER BREAKDOWN
  • A. Correct. Dual parking control valves allow you to release the spring brakes using air from a separate tank to move the vehicle in an emergency.
  • B. Incorrect. "Drive normally." is not correct. Dual parking control valves allow you to release the spring brakes using air from a separate tank to move the vehicle in an emergency.
  • C. Incorrect. "Inflate the tires." is not correct. Dual parking control valves allow you to release the spring brakes using air from a separate tank to move the vehicle in an emergency.
  • D. Incorrect. "Cool the engine." is not correct. Dual parking control valves allow you to release the spring brakes using air from a separate tank to move the vehicle in an emergency.