If the spring brakes are on, and you push the brake pedal hard:

You could damage the brakes.. Section 5.1: Never push the brake pedal when spring brakes are on. The combined force can crack the brake

If the spring brakes are on, and you push the brake pedal hard:

ANSWER BREAKDOWN
  • A. Correct. Never push the brake pedal when spring brakes are on. The combined force can crack the brake chamber.
  • B. Incorrect. "The truck will stop faster." is not correct. Never push the brake pedal when spring brakes are on. The combined force can crack the brake chamber.
  • C. Incorrect. "The springs will break." is not correct. Never push the brake pedal when spring brakes are on. The combined force can crack the brake chamber.
  • D. Incorrect. "Nothing happens." is not correct. Never push the brake pedal when spring brakes are on. The combined force can crack the brake chamber.