Chapter 51 Drum Brakes Test Review

1. In a typical drum brake, which component provides a foundation for the brake shoes and associated hardware?

• Backing plate

• Lining

• Drum

• Wheel cylinder

2. Duo-servo drum brakes are also known as _______.

• None of these are correct

• Leading-trailing brakes

• Non-servo brakes

• Self-energizing brakes

3. Technician A says an out-of-round drum can cause a pulsating brake pedal. Technician B says an out-of-round drum can cause the brakes to grab. Who is correct?

• A only

• B only

• Both A and B

• Neither A or B

4. Technician A says the leading shoe in a non-servo brake does most of the work when the brakes are applied while in reverse. Technician B says the trailing shoe does most of the work when the brake are applied while moving forward. Who is correct?

• A only

• B only

• Both A and B

• Neither A or B

5. Non-servo type brakes are normally found on _______.

• Small, lightweight passenger cars

• Large, full-size domestic cars

• Hub flange

• Pickup trucks and SUVs

6. What must be done first to remove a brake drum that is ridged and cannot be pulled past the edge of the shoes?

• Remove the drum with a slide hammer

• Pry the drum off with a large screwdriver

• Manually retract the star wheel adjuster

• Loosen the parking brake cables

7. The left rear brake drum is scored, but the right rear drum looks as good as new. Technician A says the left-side drum should be resurfaced and the right-side drum should be reinstalled without resurfacing. Technician B says both sides should be remachined to a similar diameter. Who is correct?

• A only

• B only

• Both A and B

• Neither A or B

8. A drum with a taper or out-of-roundness exceeding 0.006 inch (0.152 mm) is considered ______.

• Unacceptable and must be rebalanced

• Unacceptable and must be turned or replaced

• Acceptable

• Acceptable if polished with emery cloth

9. Duo-servo drum brake systems are being discussed. Technician A says the primary shoe lining is often thicker than the secondary shoe lining. Technician B says the primary shoe typically has more lining surface area than the secondary shoe. Who is correct?

• A only

• B only

• Both A and B

• Neither A or B

10. Technician A says the anchor pin acts as a brake shoe stop. Technician B says the return springs on a duo-servo brake are hooked over the anchor pin. Who is correct?

• A only

• B only

• Both A and B

• Neither A or B