ASE Brakes A5 Test (Exam 2 with A+ Graded Solutions)

The brakes are dragging on a vehicle. this could be cause by a. overfilled master cylinder reservoir b. low vacuum to the boost c. bypassing master cylinder d. quick take-up valve stuck open correct answers A : overfilled master cylinder reservoir why : an overfilled master cylinder reservoir cylinder would not allow for fluid expansion. this would cause the brakes to self apply as the fluid expanded as result in brake drag The brake pads are worn at an angle on a vehicle with a sliding brake caliper system. which of the following is most likely the cause? a. worn caliper piston b. worn caliper bushings c. leaking caliper seal d. leaking caliper boot correct answers B : worn caliper bushings why : worn bushings can cause the caliper to cock during operation. this could cause the pads to wear at an angle A diagnostic trouble code is set for an open wheel speed sensor on the left front sensor. The technician measures the resistance at the sensor and finds it to be within specification. Which of the following is the most likely cause for the wheel speed sensor code? a. faulty ABS computer b. open fuse c. open wiring from the computer to the wheel speed sensor d. shorted left front ABS modulator valve correct answers C : open wiring from the computer to the wheel speed sensor why : an open in the wiring from the sensor to the computer would cause a diagnostic trouble code to be set and the sensor to have the correct resistance The brake warning lamp pictured above (pg. 56) stays on any time the ignition switch is on. Tech A says this could be caused by a poor ground at the parking brake switch. Tech B says this could be caused by a poor ground at the brake warning lamp switch. Who is correct? a. A only b. B only c. A & B d. neither A or B correct answers D : neither A or B