1. Manufacturers use specific lining materials that dampen vibrations to quiet noisy disc brakes. Most calipers use _______ to hold the pads in the caliper under tension to help prevent vibration.
A. antirattle clips
B. stiff springs
C. harder brake linings
D. locking bolts
2. Technician A says that starwheel adjusters use different threads (right- and left-handed) for the right and left sides of the vehicle. Technician B says that the threads and end caps of the adjusters should be lubricated with brake grease before installation. Which technician is correct?
A. Technician B only
B. Neither Technician A nor Technician B
C. Both Technician A and Technician B
D. Technician A only
3. Two technicians are discussing disc brakes. Technician A says that the front disc brakes may have the splash shield bolted to the spindle. Technician B says that rear disc brakes may have the splash shield bolted to the steering knuckle. Which technician is correct?
A. Neither Technician A nor Technician B
B. Both Technician A and Technician B
C. Technician B only
D. Technician A only
5. Two technicians are describing parking brake systems that mechanically actuate the rear disc brakes. Technician A says that the calipers are self-adjusting. Technician B says that the single piston construction of these calipers makes them easier to actuate. Who is correct?
A. Neither Technician A nor B
B. Technician A
C. Technician B
D. Both Technicians A and B
6. Which type of disc brake caliper is more prone to leaking fluid?
A. Sliding
B. Fixed
C. Low-drag
D. Floating
7. The backing plate should be replace if the pads or ledges are worn by more than _______ inches.
A. 1/8
B. 1/2
C. 1/16
D. 1/4
8. Technician A says that one disadvantage of disc brakes is noise. Technician B says that disc brakes are easier to equip with a parking brake mechanism than drum brakes. Who is correct?
A. Technician A
B. Neither Technician A nor B
C. Technician B
D. Both Technicians A and B
9. Which of these is the greatest disadvantage of drum brakes?
A. Lack of adjustment
B. Lack of proper power assist
C. Poor parking brake performance
D. Brake fade
10. A starwheel adjuster is installed on the wrong side of the vehicle. Technician A says that the adjuster won't operate if it's installed on the wrong side. Technician B says that the adjuster will operate, but that it will cause the clearance to increase rather than decrease when activated. Who is correct?
A. Technician B
B. Technician A
C. Neither Technician A nor B
D. Both Technicians A and B
11. A hydraulically operated booster or Hydro-Boost unit stores fluid under pressure using a/an
A. boost piston.
B. actuator.
C. accumulator.
D. diaphragm.
12. You're inspecting disc brake pads. Technician A says the wheel must be removed in most cases to measure pad thickness. Technician B says lining-to-rotor clearance changes after a brake application. Who is correct?
A. Both Technicians A and B
B. Technician A
C. Technician B
D. Neither Technician A nor B
13. A typical drum brake uses _______ hold-down springs.
A. two
B. five
C. four
D. three
14. Vacuum brake boosters use a _______ to provide a sense of feel during braking.
A. reaction disc
B. diaphragm
C. pressure restrictor
D. vacuum diverter
15. Two technicians are discussing drum brake design and service. Technician A says that the labyrinth seal helps to keep water from getting into a drum brake. Technician B says that only synthetic brake grease, lithium brake grease or anti-seize compound should be used as a brake lubricant. Who is correct?
A. Technician B
B. Technician A
C. Neither Technician A nor B
D. Both Technicians A and B
17. Technician A says to use synthetic brake grease to lubricate the backing plate. Technician B says to use special lithium-based brake grease. Who is correct?
A. Neither Technician A nor B
B. Technician A
C. Technician B
D. Both Technicians A and B
18. On nonservo brakes, the _______ shoe does most of the braking during forward movement.
A. leading
B. secondary
C. primary
D. trailing
19. With the drums installed, you would apply _______ clicks of the parking brake to obtain a slight drag on both rear wheels
A. three to four
B. one to two
C. six to ten
D. five to six
20. Two technicians are discussing drum brake shoes. Technician A says that forward- and rear-facing shoes are the same and can be installed in any position. Technician B says that the darker color linings should always be placed toward the front of the vehicle. Which technician is correct?
A. Technician B only
B. Technician A only
C. Both Technician A and Technician B
D. Neither Technician A nor Technician
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