STATE BRAKE CERTIFICATION with 100% correct answers (latest update)

A cracked or torn vacuum diaphragm in a brake power booster would most likely cause: a hard pedal feel requiring very high pedal effort to stop 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: drop slightly and remain firm A mechanic finds gear lube inside both rear drums on a rear wheel drive vehicle. What is most likely the cause of this problem? a plugged axle The rear brakes are dragging after having new linings installed and the drums machined. the most likely cause is the: technician use the parking brake to adjust shoes and the cable is stuck While test driving a car, the mechanic finds that the right front brake "grabs". The most likely cause of this problem is: brake fluid or grease on the brake linings Which of the following incorrect service procedures will cause brake lock-up? master cylinder push rod adjusted too long Which of the following incorrect service procedures could cause brake pedal pulsation? incorrect run-out on the car brake lathe A common cause of pedal pulsation during brake application is: NOT caused by improperly torqued wheels, damaged backing plates, or lubricated shims A properly functioning load sensing proportioning valve will: cause an increase in the hydraulic pressure during braking at the rear wheel cylinders when the vehicle is loaded. which of the following is a quick way to isolated a defective master cylinder? There are no external leaks in the system. pump up the brake pedal, then hold it firm. if the pedal slowly drops to the floor, the master cylinder may be defective. After rebuilding a master cylinder, the rod between the master cylinder and booster should be: 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? silicone fluid added to the system When inspecting brake fluid levels, a technician observes low fluid levels. which of the following should be done first? Inspect disc brake pads for excessive wear During a road test, you find that when normal braking pressure is applied the pedal slowly goes to the floor. what is the most likely cause of this problem? a leaking master cylinder primary piston seal Wheel speed sensors: send an A/C signal to the control module Before replacing a hydralic brake hose on an ABS equipped vehicle, you should first: relieve brake system pressure according to manufacturer procedures When would the pump motor be activated in an anti-lcok brake system with traction assist? when brake pedal pulsates Which of the following is true about bleeding brake lines on most ABS equipped vehicles? Most ABS brake lines can be bled like a conventional (non-ABS) system. However, caution must be taken because of the extreme pressure. Flexible brake hoses should be replaced: when dampness is evident on the hose Most anti-lock brake systems require the removal of the pressure modulator fuse when: a "spaced-saver" spare tire is being used and mismatched tires are being installed ABS speed sensor and sensor rings: should not be hammered or tapped on and should always be replaced as a matched set One way to test an ABS wheel speed signal is to use _____ on your digital multimeter. AC volts The key input for the ABS control module comes from the: wheel speed sensors