EXAM QUESTIONS AND ANSWERS
1. A cracked or torn vacuum diaphragm in a brake power booster would most
likely cause
Answer a hard pedal feel requiring very high pedal ettort to stop
2. 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
3. A mechanic finds gear lube inside both rear drums on a rear wheel drive
vehicle. What is most likely the cause of this problem?
Answer a plugged axle
4. The rear brakes are dragging after having new linings installed and the drums
machined. the most likely cause is the
Answer technician use the parking brake to adjust shoes and the cable is stuck
5. 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
1/
6
, 6. Which of the following incorrect service procedures will cause brake lock-up?-
Answer master cylinder push rod adjusted too long
7. Which of the following incorrect service procedures could cause brake pedal
pulsation?
Answer incorrect run-out on the car brake lathe
8. A common cause of pedal pulsation during brake application is
Answer NOT caused by improperly torqued wheels, damaged backing plates, or lubricated shims
9. 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.
10. 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.
11. After rebuilding a master cylinder, the rod between the master cylinder
and booster should be
Answer adjusted properly
12. Upon inspecting brake fluid condition, the technician observes the di-
2/
6