Sos Brake & Braking System Study Guide Graded A+

Technician A says the diameter of a brake drum is measured with a brake drum micrometer and the measurement should be taken in several locations. Technician B says the wall thickness of a brake drum should be measured with a micrometer. Who is right? {Ans: A only}When the brakes are applied on a car with disc-drum brakes, a vibration or pulsating movement is felt. What can cause this problem? {Ans: A rotor thickness variation}Technician A says it is normal for the amber "Anti-Lock Brake" lamp to light when the system is activated during braking. Technician B says it is normal for the red "Anti-Lock Brake" lamp to be on whenever the ignition is on and the engine is off. Who is right? {Ans: Neither A or B}The brakes of a car squeal each time they are applied, which of the following is the LEAST likely source of the noise? {Ans: Glazed brake pads}The brake lights on a car do not light when the brake pedal is depressed, which of the following is the LEAST likely cause of the problem? {Ans: A burned out bulb.}Technician A says when the disc brakes anti-rattle springs are incorrectly positioned