Question

technician a says although four-wheel disc brakes have become standard equipment of most cars and light trucks, drum brakes continue to be in use for a few rear-wheel brakes. technician b says no law or regulation requires disc brakes, but the brake performance requirements of fmvss 105 make front disc brakes virtually mandatory. who is correct?

Answer 1

Technician A is correct that drum brakes are still used for rear-wheel brakes, while Technician B is correct that front disc brakes are virtually mandatory due to the brake performance requirements of FMVSS 105.

Step-by-step explanation:

Technician A is correct. Although four-wheel disc brakes have become standard equipment on most cars and light trucks, drum brakes are still used for a few rear-wheel brakes. This is because drum brakes are typically less expensive and provide sufficient stopping power for rear wheels.

Technician B is also correct. While there is no law or regulation that specifically requires disc brakes, the brake performance requirements of FMVSS 105 (Federal Motor Vehicle Safety Standard) make front disc brakes virtually mandatory. FMVSS 105 sets standards for brake performance, including stopping distance and fade resistance, which are easier to achieve with disc brakes.