Technician A says an out-of-round drum can cause a pulsating brake pedal. Technician B says an out-of-round drum can cause the brakes to grab. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Question

Quizplus · Accepted Answer

Both technicians are correct. An out-of-round drum can cause a pulsating brake pedal due to uneven contact with the brake shoes, and it can also cause the brakes to grab as the high spots on the drum make contact with the brake shoes.

Technician a Says an Out-Of-Round Drum Can Cause a Pulsating