State Break Certification Practice Exam

The type of disc parking brake that is NOT typically recognized is the "Roll and Lock" system. Disc parking brakes are generally designed around specific mechanical principles that utilize components like those found in the other choices: Ball and Ramp, Drum-in-Hat, and Screw and Nut.

The Ball and Ramp system employs a mechanical advantage through a combination of a ball ramp mechanism that helps to create the necessary force to engage the braking system. The Drum-in-Hat also uses a drum brake system, often utilized in conjunction with disc brakes, to provide additional stopping power when engaged. The Screw and Nut system relies on a threaded mechanism to tighten and engage the brake, effectively locking the wheel in place.

In contrast, the "Roll and Lock" does not correspond to a recognized mechanism within standard disc parking brake designs, making it the incorrect option in this context.