ASE A5 Practice Test 2023 (100% correct answers)

1. On a car with disc/drum brakes, the front brakes grab quickly when light pedal pressure is applied. This problem could be caused by a bad: A. proportioning valve B. pressure safety switch C. metering valve D. residual check valve correct answers C 2. The driver of a vehicle with power disc/drum brakes says that the brake pedal moves slowly to the floor while maintaining pedal pressure at a stoplight. What could cause this problem? A. leaking primary piston cup in master cylinder B. leaking power brake booster C. leaking residual check valve in master cylinder D. internal leak in the combination valve correct answers A 3. Which of the following would MOST LIKELY happen if the measurements taken from the check shown above varied from the manufacturer's specifications? A. noisy brake operation B. brake grab or pull C. pulsating brake pedal D. low brake pedal correct answers C 4. What is the purpose of the master cylinder residual check valve(s) on vehicles equipped with drum brakes? A. allows the driver to pump up the brakes B. prevents air from entering the hydraulic system C. prevents wheel lockup by reducing the hydraulic pressure D. reduces pedal pulsation by controlling hydraulic pressure correct answers B 5. A technician has just overhauled the front brakes on a vehicle with front disc and rear drum brakes. However, when he attaches a pressure bleeder (pressurized to about 25 psi) to the master cylinder, he cannot get any fluid to come out of the disc brake caliper bleeder screws. Which of the following is MOST LIKELY the cause? A. bad proportioning valve B. bad pressure differential valve C. proportioning valve release button not activated