Final answer:
Technician A is correct. Most parking brake systems use a cable to connect the parking brake lever or pedal to the braking assemblies. Technician B is incorrect. Cable assemblies in parking brake systems can be adjustable.
Step-by-step explanation:
Technician A is correct. Most parking brake systems do use a cable to connect the parking brake lever or pedal to the braking assemblies. The function of the parking brake cable is to engage the parking brake mechanism, which can be either a drum brake or a disc brake. The cable pulls on a lever or pedal, which then applies the parking brake.
Technician B is incorrect. Cable assemblies in parking brake systems can be adjustable. They often have an adjustment mechanism or nut that can be used to tighten or loosen the cable tension. This allows for adjustments to be made as the brake components wear and to ensure proper brake operation. If the parking brake is not working, it does not necessarily mean that the cable assembly needs to be replaced. Other components in the parking brake system, such as the brake shoes or pads, may need to be inspected and replaced if necessary.