EMCC ATA146 Final Exam Questions and Answers

EMCC ATA146 Final Exam Questions and Answers Disc brakes require more force than drums to achieve the same braking effort - ANSWER true when replacing pads on actuating type calipers, the piston must be kept from spinning as the c clamp pusher the piston back into the caliper bore - ANSWER false a typical fixed caliper housing is designed with one caliper piston - ANSWER false what prevents moisture from entering the cylinder bore? - ANSWER the dust boot tech a siphons out about 2/3 of the brake fluid from the master cylinder before beginning work on the pads or calipers. tech b opens the caliper bleeder screws and runs a hose to a container to catch the fluid that is expelled, while pusing the pistons back. - ANSWER C rotors are typically made from - ANSWER cast iron the ball and ramp type parking brake actuator is found on what make of vehicles? - ANSWER Ford tech a cleans brake components in denatured alcohol. tech b cleans brake components in clean brake fluid. who is correct? - ANSWER C tech a replaces the pads if the linings are lass than 1/8th inch. tech b says if the pad on one side of the caliper is worn more than the other side, the rotor has excess runout and must be replaced - ANSWER A disc brake caliper pistons are being removed. tech a positions a large dull screwdriver in the piston's dust boot broove to pry out the piston. tech b injects 25psi of air pressure into the fluid line connecting bore to remove the caliper piston. who is correct? - ANSWER C composite rotors are made of cast iron and - ANSWER steel tech a says a fixed rotor has an integral hub inside which the wheel bearings are mounted. technician b says a floating rotor is less expensive than a fixed rotor and can be replaced easily and economically. - ANSWER C solid rotors are usually found on : front brakes of small compact vehicles rear brakes of vehicles with rear discs front bakes of small compact vehicles both1/2 - ANSWER both tapered roller bearings are being discussed tech a says the grease seal is installed onth the outboard side of the bearing. tech b says the outer cup or race is pressed into the hub. who is correct - ANSWER b brake calipers are being discussed. tech a says the bleeder screw is located at the bottom of the cylinder bore. tech b says the fluid inlet hole is located at the top of the cylinder bore - ANSWER D what compopnent in the brake caliper acts as a retracting mechanism for the piston when hydraulic pressure is released - ANSWER square cut o ring CS high pitched squeal when wheels are turing, except when the brakes are applied. tech a says pads are worn. tech b says rotors are scored - ANSWER A electronic pad wear warning sytems are being discussed. tech a says pad wear sensors are wired in parallel, tech b says series - ANSWER both caliper pistons that have a threaded adjuster pushrods and internally threaded adjuster nuts are found on - ANSWER rear wheel actuating calipers lthe red brake warning light is NOT on when - ANSWER a fault in abs is detected. a vibration or pulsation in the brake pedal when the brakes are applied is usually caused by - ANSWER warped rotors