wheel cylinder bore

54. The function of the wheel cylinder is to ______.

 

A. Convert hydraulic pressure to a mechanical force at the drum brakes

B. Maintain correct shoe position and clearance

C. Prohibit the shoe from following the movement of the rotating drum

D. Provide the rubbing surface area for the linings

 

 

55. The wheel cylinder bore is filled with brake fluid. When the pedal is depressed, additional brake fluid is forced into the cylinder.

 

True or False:

self-adjusting calipers

69. Complete the following statement about self-adjusting calipers using the following words.

Words: Fluid, Hydraulic, Pads, Piston, Pressure, Retract, Ring, Rotor, Slightly, Wear

A piston hydraulic (square-cut) seal prevents __________ leakage between the cylinder bore wall and the piston. This rubber sealing __________ also acts as a retracting mechanism for the piston when hydraulic __________ is released, causing the piston to return in its bore. When __________ pressure is diminished, the seal functions as a return spring to retract the __________.

In addition, as the disc brake __________ wear, the seal allows the piston to move farther out to adjust automatically for the __________ without allowing fluid to leak. Since the brake pads need to __________ only slightly after they have been applied, the piston moves back only __________ into its bore. The additional brake fluid in the caliper bore keeps the piston out and ready to clamp the surface of the __________.

disc brake assembly

64. A ventilated rotor helps cool the disc brake assembly.

 

True or False:  

 

 

 

65. Rotors are typically made from ______.

 

A. Aluminium

B. Cast iron

C. Both “aluminium” and “cast iron”

D. Neither “aluminium” nor “cast iron”

 

 

66. Linings are ____ to disc brake pads.

 

A. Riveted

B. Bonded

C. Both “riveted” and “bonded”

D. Neither “riveted” nor “bonded”

brake rotors

62. What are the two basic types of brake rotors used on today’s vehicles?

 

 

 

 

 

63. Solid rotors are usually found on _____.

 

A. The front brakes of small, compact vehicles

B. The rear brakes of vehicles with rear disc brakes

C. The front brakes of large pickup trucks and SUVs

D. Both “the front brakes of small, compact vehicles” and “the rear brakes of vehicles with rear disc brakes”