Question

When you release the brake pedal, What happens?

1) The S-cam rotates back and a spring pulls the brake shoes away from the drum, letting the wheels roll freely again.
2) The brake shoes get stuck to the drum, preventing the wheels from rolling freely.
3) The brake pedal gets stuck and cannot be released.
4) The brake shoes tighten around the drum, causing the wheels to lock up.

Answer 1

When you release the brake pedal, the S-cam rotates back and a spring pulls the brake shoes away from the drum, allowing the wheels to roll freely again.

Step-by-step explanation:

When you release the brake pedal, the S-cam rotates back and a spring pulls the brake shoes away from the drum, letting the wheels roll freely again. This is due to the release of pressure in the hydraulic system that activates the brakes. The spring force pushes the brake shoes away from the drum, creating a gap between them and allowing the wheels to rotate without being locked up.