The braking power of the spring brakes depends on:

The service brakes being in adjustment.. Section 5.1: Spring brakes push against the same linkage as the air brakes. If the slack adjusters

The braking power of the spring brakes depends on:

ANSWER BREAKDOWN
  • A. Correct. Spring brakes push against the same linkage as the air brakes. If the slack adjusters are out of adjustment, the spring brakes will also be weak.
  • B. Incorrect. "The amount of air in the tanks." is not correct. Spring brakes push against the same linkage as the air brakes. If the slack adjusters are out of adjustment, the spring brakes will also be weak.
  • C. Incorrect. "The weight of the vehicle." is not correct. Spring brakes push against the same linkage as the air brakes. If the slack adjusters are out of adjustment, the spring brakes will also be weak.
  • D. Incorrect. "The temperature outside." is not correct. Spring brakes push against the same linkage as the air brakes. If the slack adjusters are out of adjustment, the spring brakes will also be weak.