Download Michigan State Brakes Certification 2025 Edition: Questions and Answers and more Exams Automobile Engineering in PDF only on Docsity!
Michigan State Brakes Certification 2025 Edition.
Questions and Correct Verified Answers. Graded A
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?
- ANSA plugged booster air breather A car has a spongy pedal. Which of the following could be the cause? - ANSAir in the system. A car has an excessive amount of pedal travel during brake application, which of he following could be the cause? - ANSExcessive clearance between the shoes and drum. A car's wheels severely vibrate when the brakes are applied, which of the following is the LEAST likely source of he problem? - ANSThe master cylinder A common cause of pedal pulsation during brake application is: - ANSNOT caused by improperly torqued wheels, damaged backing plates, or lubricated shims
A cracked or torn vacuum diaphragm in a brake power booster would most likely cause: - ANSa hard pedal feel requiring very high pedal effort to stop A customer complains that the brake pedal slowly moves to the floor when a steady pressure is applied. There is no sign of fluid leakage. Which of the following is the most portable cause of the problem? - ANSA worn primary cup 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? - ANSA plugged axle A properly functioning load sensing proportioning valve will: - ANScause an increase in the hydraulic pressure during braking at the rear wheel cylinders when the vehicle is loaded. A rattle is a single piston disc brake assembly which goes away when the brakes are applied is most likely a result of: - ANSLoose pads in the caliper ABS speed sensor and sensor rings: - ANSshould not be hammered or tapped on and should always be replaced as a matched set
An example of an incorrect procedure for replacing brake pads in a disc brake system is: - ANSRemove the piston from the caliper and clean all rust corrosion, and dirt Before replacing a hydralic brake hose on an ABS equipped vehicle, you should first: - ANSrelieve brake system pressure according to manufacturer procedures 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? - ANSA leaking master cylinder primary piston seal. Flexible brake hoses should be replaced: - ANSwhen dampness is evident on the hose If a drum brake self-adjuster seizes up, the likely result will be: - ANSNOT a low pedal, worn or brake drum, or a loose emergency brake cable. If vacuum is present on both sides of the diaphragm in a brake booster: - ANSThe brakes are being released
In disc brake caliper assemblies, the "square cut seal" is usually located: - ANSIn the caliper piston bore Most 1995 & newer vehicles use which of the following types of wheels bearings on non-drive wheel? - ANSSealed non-serviceable Most anti-lock brake systems require the removal of the pressure modulator fuse when: - ANSa "spaced-saver" spare tire is being used and mismatched tires are being installed On a 3-channel system, which wheels are on the same circuit? - ANSboth rear wheels On a single anchor duo-servo drum brake system, which shoe does most of the braking? - ANSsecondary shoe On a vehicle with a disc/drum brake system, the rear wheels lock up under hard braking. The most likely cause is: - ANSA defective proportioning valve One way to test an ABS wheel speed signal is to use _____ on your digital multimeter. - ANSAC volts
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? - ANSDefective metering valve The key input for the ABS control module comes from the: - ANSwheel speed sensors The rear brakes are dragging after having new linings installed and the drums machined. the most likely cause is the: - ANStechnician use the parking brake to adjust shoes and the cable is stuck There is a scraping sound coming from one rear brake. The sound stops when the brakes are applied. What is most likely the cause of the problem? - ANSa broken shoe hold-down spring or pin 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? - ANSA broken shoe hold-down spring or pin This tool is used to? - ANSAdjust the brake shoes to the drum
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: - ANSdrop slightly and remain firm 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?
- ANSsilicone fluid added to the system What does a load sensing proportioning valve do? - ANSIt increases the hydraulic pressure during braking at the rear wheel cylinders when the vehicle is loaded What information might be found on a brake drum to help a mechanic? - ANSThe maximum diameter dimension What type of rotor surface provides the best braking with new pads? - ANSA smooth, flat surface Wheel speed sensors: - ANSsend an A/C signal to the control module When adjusting disc-drum brakes, you should: - ANSAdjust the rear brakes after releasing the parking brakes
When would the pump motor be activated in an anti-lcok brake system with traction assist? - ANSwhen brake pedal pulsates Which lining does most of the braking on a leading/trailing brake? - ANSprimary shoe Which of the following can be used to check for rotor thickness variation? - ANSDial indicator Which of the following could be a symptom of over-torqued lug nuts? - ANSA brake pedal pulsation during braking. Which of the following describes the correct sequence for bleeding brake lines on most front wheel drive vehicles? - ANSRR,LR, RF, LF Which of the following describes the proper sequence to bleed brake lines on most rear wheel drive vehicles: - ANSRR, LR, RF, LF
Which of the following describes the proper way to depressurized an ABS system?
- ANSPump the brake pedal at least 25 times (or more, depending on the manufacturer's recommendation) with the ignition off. Which of the following incorrect service procedures could cause brake pedal pulsation? - ANSincorrect run-out on the car brake lathe Which of the following incorrect service procedures will cause brake lock up? - ANSMaster Cylinder push rod adjusted too long Which of the following incorrect service procedures will cause brake lock-up? - ANSmaster cylinder push rod adjusted too long which of the following is a quick way to isolated a defective master cylinder? There are no external leaks in the system. - ANSpump up the brake pedal, then hold it firm. if the pedal slowly drops to the floor, the master cylinder may be defective. Which of the following is a true statement about proportioning valves? - ANSThey provide better braking balance during hard stops
Which of the following is true about most properly functioning anti-lock brake systems? - ANSThe brakes may lock up at speeds less than 10 miles per hour Which of the following is true when inspecting wheel speed sensors? - ANSYou should measure the air gap between the sensor and the reluctor wheel teeth Which of the following should be used to check for rotor thickness variation: - ANSMicrometer Which of the following would be the LEAST likely cause for an intermittent problem in an ABS system? - ANSOpen wheel sensor circuit Which of the following would be the result of an inoperative ABS pump/motor assembly: - ANSConventional braking should still be available Which of the following would most likely cause dragging brakes? - ANSA defective vehicle load sensor While test driving a car, the mechanic finds that the right front brake "grabs". The most likely cause of this problem is: - ANSbrake fluid or grease on the brake linings
Why don't disc brake system usually need adjustment? - ANSA certain amount of pressure is maintained by the metering valve You are installing a set of brake shoe linings that are not the same length. Traditionally, the primary shoe lining is: - ANSSmaller and goes towards the front of the car. You are rebuilding a master cylinder. What should you use to lubricate the internal parts? - ANSBrake fluid
