When the brake shoes have worn grooves in the contact pads on the backing plate, a __ noise is caused when the shoe moves into and out of the groove. Select one: a. Groaning b. Clicking c. Grinding d. Popping

The correct answer is c. Grinding.<br /><br />When the brake shoes have worn grooves in the contact pads on the backing plate, a grinding noise is caused when the shoe moves into and out of the groove. This grinding noise is often described as a high-pitched, metallic sound and indicates that the brake shoes are worn and need to be replaced.