The braking power of the spring brakes:

Depends on the service brakes being in adjustment.. Section 5.1: Spring brakes act on the same foundation brakes as the service brakes. If

The braking power of the spring brakes:

ANSWER BREAKDOWN
  • A. Correct. Spring brakes act on the same foundation brakes as the service brakes. If the brakes are out of adjustment, the spring brakes will also be weak.
  • B. Incorrect. "Is not affected by the condition of the service brakes." is not correct. Spring brakes act on the same foundation brakes as the service brakes. If the brakes are out of adjustment, the spring brakes will also be weak.
  • C. Incorrect. "Is greater than the service brakes." is not correct. Spring brakes act on the same foundation brakes as the service brakes. If the brakes are out of adjustment, the spring brakes will also be weak.
  • D. Incorrect. "Depends on the air pressure." is not correct. Spring brakes act on the same foundation brakes as the service brakes. If the brakes are out of adjustment, the spring brakes will also be weak.