Download Brake System Troubleshooting and more Exams Nursing in PDF only on Docsity!
Michigan State Brakes Certification/ 83 Quizzes
with Certified Ans/ Latest Update.
Which of the following is NOT a necessary drum brake measurement? - Answer: run-out On a 3-channel system, which wheels are on the same circuit? - Answer: both rear wheels One way to test an ABS wheel speed signal is to use _____ on your digital multimeter. - Answer: AC volts The key input for the ABS control module comes from the: - Answer: wheel speed sensors ABS speed sensor and sensor rings: - Answer: should not be hammered or tapped on and should always be replaced as a matched set Flexible brake hoses should be replaced: - Answer: when dampness is evident on the hose Which of the following should be used to check for rotor thickness variation: - Answer: Micrometer
After rebuilding a master cylinder, the rod between the master cylinder and booster should be: - Answer: adjusted properly Upon inspecting brake fluid condition, the technician observes the diaphragm in the master cylinder cup is swollen. Which of the following is the most likely cause? - Answer: silicone fluid added to the system Most 1995 & newer vehicles use which of the following types of wheels bearings on non-drive wheel? - Answer: Sealed non-serviceable to test a vacuum power brake booster in the vehicle, you should pump the brake pedal at least 4 times, hold the brake pedal depressed, and start the engine. the brake pedal should: - Answer: drop slightly and remain firm You are installing a set of brake shoe linings that are not the same length. Traditionally, the primary shoe lining is: - Answer: Smaller and goes towards the front of the car. A cracked or torn vacuum diaphragm in a brake power booster would most likely cause: - Answer: a hard pedal feel requiring very high pedal effort to stop A mechanic finds gear lube inside both rear brake drums on a rear-wheel-drive vehicle. What is the most likely cause of this problem? - Answer: A plugged axle Which of the following incorrect service procedures will cause brake lock-up? - Answer: master cylinder push rod adjusted too long
Which of the following is a true statement about proportioning valves? - Answer: They provide better braking balance during hard stops A properly functioning load sensing proportioning valve will: - Answer: cause an increase in the hydraulic pressure during braking at the rear wheel cylinders when the vehicle is loaded. Why don't disc brake system usually need adjustment? - Answer: A certain amount of pressure is maintained by the metering valve The front brakes of a car equipped with disc brakes in the front and drum brakes in the rear, grab quickly as light pressure is applied to the brake pedal, which of the following could be the cause of the problem? - Answer: Defective metering valve The brake warning light on the dash stays on all the time, which of the following could be the cause of the problem? - Answer: A problem in the hydraulic circuit Which of the following would be the LEAST likely cause for an intermittent problem in an ABS system? - Answer: Open wheel sensor circuit 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? - Answer: A burned out bulb. Which of the following incorrect service procedures could cause brake pedal pulsation? - Answer: incorrect run-out on the car brake lathe What type of rotor surface provides the best braking with new pads? - Answer: A smooth, flat surface
which of the following is a quick way to isolated a defective master cylinder? There are no external leaks in the system. - Answer: pump up the brake pedal, then hold it firm. if the pedal slowly drops to the floor, the master cylinder may be defective. A common cause of pedal pulsation during brake application is: - Answer: NOT caused by improperly torqued wheels, damaged backing plates, or lubricated shims the car is at reset. When you slowly apply the brake pedal you hear a squeaking noise at the rear of the vehicle. what could cause this noise? - Answer: dry backing plate contact surfaces While test driving a car, the mechanic finds that the right front brake "grabs". The most likely cause of this problem is: - Answer: brake fluid or grease on the brake linings Wheel speed sensors: - Answer: send an A/C signal to the control module Which of the following incorrect service procedures will cause brake lock up? - Answer: Master Cylinder push rod adjusted too long During a road test, you find that when normal breaking pressure is applied the pedal slowly goes to the floor. What is the likely cause of this problem? - Answer: A leaking master cylinder primary piston seal. Before replacing a hydralic brake hose on an ABS equipped vehicle, you should first: - Answer: relieve brake system pressure according to manufacturer procedures When would the pump motor be activated in an anti-lcok brake system with traction assist? - Answer: when brake pedal pulsates
Sliding caliper disc brake pads are kept in adjustment by the - Answer: Square cut piston seal When the brakes are applied on a car with disc-drum brakes, a vibration or pulsating movement is felt. What can cause this problem? - Answer: A rotor thickness variation A rattle is a single piston disc brake assembly which goes away when the brakes are applied is most likely a result of: - Answer: Loose pads in the caliper Which of the following would most likely cause dragging brakes? - Answer: A defective vehicle load sensor There is a scraping sound coming from one rear brake. The sound stops when the brakes are applied. What is the likely cause of the problem? - Answer: A broken shoe hold-down spring or pin Which of the following can be used to check for rotor thickness variation? - Answer: Dial indicator On a vehicle with a disc/drum brake system, the rear wheels lock up under hard braking. The most likely cause is: - Answer: A defective proportioning valve After putting a bearing race in a hub, you notice that the new race is loose and can spin in the hub. What should you do? - Answer: Replace the hub When adjusting disc-drum brakes, you should: - Answer: Adjust the rear brakes after releasing the parking brakes You are rebuilding a master cylinder. What should you use to lubricate the internal parts? - Answer: Brake fluid
Which of the following is the most likely cause of low fluid level in the master cylinder? - Answer: Worn brake pads and linings Which of the following describes the correct sequence for bleeding brake lines on most front wheel drive vehicles? - Answer: RR,LR, RF, LF All of the following are steps in the procedure for servicing a typical dual master cylinder, EXCEPT: - Answer: Clean the master cylinder with a degreasing solvent All of the following, EXCEPT one could cause the parking brakes to fail or not hold: - Answer: Air in the system An example of an incorrect procedure for replacing brake pads in a disc brake system is: - Answer: Remove the piston from the caliper and clean all rust corrosion, and dirt A car's wheels severely vibrate when the brakes are applied, which of the following is the LEAST likely source of he problem? - Answer: The master cylinder If vacuum is present on both sides of the diaphragm in a brake booster: - Answer: The brakes are being released Which of the following is not a necessary precaution to follow when performing brake repairs on an ABS equipped vehicle? - Answer: Always remove the electronic brake control module fuse before adjusting or replacing a wheel speed sensor Which of the following is true when inspecting wheel speed sensors? - Answer: You should measure the air gap between the sensor and the reluctor wheel teeth
Which of the following is the LEAST likely cause of one brake dragging? - Answer: A corroded master cylinder bore A car has a spongy pedal. Which of the following could be the cause? - Answer: Air in the system. Which of the following is not correct in the procedure for preparing a brake rotor for matching?
- Answer: Use a brake micrometer to measure the diameter A car equipped with a vacuum assist power brake system reads an abnormal amount of pedal effort to stop the car, which of the following could be the cause? - Answer: A plugged booster air breather
