If you have a dual air system and the primary system fails, the secondary system will:

Continue to operate the brakes on the other axle.. Section 5.2: The secondary system provides backup braking on at least one axle.

If you have a dual air system and the primary system fails, the secondary system will:

ANSWER BREAKDOWN
  • A. Correct. The secondary system provides backup braking on at least one axle.
  • B. Incorrect. "Fail also." is not correct. The secondary system provides backup braking on at least one axle.
  • C. Incorrect. "Stop the truck instantly." is not correct. The secondary system provides backup braking on at least one axle.
  • D. Incorrect. "Blow a fuse." is not correct. The secondary system provides backup braking on at least one axle.