questions and verified answers covering brake systems,
diagnostics, repair procedures, and state regulatory standards .
1. Most 1995 & newer vehicles use which of the following types of wheels bearings on
non-drive wheel? answer-Sealed non-serviceable
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. You are installing a set of brake shoe linings that are not the same length. Traditionally,
the primary shoe lining is: answer-Smaller and goes towards the front of the car.
4. A cracked or torn vacuum diaphragm in a brake power booster would most likely cause:
answer-a hard pedal feel requiring very high pedal effort to stop
5. 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? answer-A plugged axle
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 describes the proper way to depressurized an ABS system?
answer-Pump the brake pedal at least 25 times (or more, depending on the
manufacturer's recommendation) with the ignition off.
8. 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
, 9. When turning brake drums: answer-use a dampening strap to reduce chatter
10. Which of the following is NOT a necessary drum brake measurement? answer-run-out
11. On a 3-channel system, which wheels are on the same circuit? answer-both rear wheels
12. One way to test an ABS wheel speed signal is to use _____ on your digital multimeter.
answer-AC volts
13. The key input for the ABS control module comes from the: answer-wheel speed sensors
14. ABS speed sensor and sensor rings: answer-should not be hammered or tapped on and
should always be replaced as a matched set
15. Flexible brake hoses should be replaced: answer-when dampness is evident on the hose
16. Which of the following should be used to check for rotor thickness variation: answer-
Micrometer
17. After rebuilding a master cylinder, the rod between the master cylinder and booster
should be: answer-adjusted properly
18. 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? answer-
silicone fluid added to the system