Final answer:
Both Tech A and Tech B are correct. Tech A describes the workings of a disc brake system, while Tech B explains how a drum brake system operates.
Both systems use Pascal's Principle within a hydraulic system to ensure even distribution of braking force.
Step-by-step explanation:
Tech A is accurate in stating that in a disc brake system, the brake caliper clamps the two brake pads against the brake rotor to slow the vehicle.
On the other hand, Tech B correctly states that in a drum brake system, the wheel cylinder extends the two brake shoes outward so that they press against the inner surface of the drum, creating friction to slow the vehicle.
Pascal's Principle is fundamental to the operation of hydraulic brake systems. When the driver pushes the brake pedal, the force, often magnified by a simple lever, is transmitted through a hydraulic system to the brake calipers or wheel cylinders. This system ensures that the pressure is distributed evenly, allowing for consistent braking force at each wheel.