AUT 101 STUDY GUIDE 2026/2027 QUESTIONS AND
SOLUTIONS RATED A+
✔✔Cup seal-a - ✔✔circular rubber seal with a depressed center section surrounded by
a raised sealing lip to form a cup
✔✔Metallic linings- - ✔✔brake friction material made from powdered metal that is
formed into blocks by heat and pressure
✔✔Metering valve- - ✔✔a component that momentarily delays the application of front
disc brakes until the rear drum brakes begin to move. Helps to provide balanced braking
✔✔Nonasbestos organic linings (NAO)- - ✔✔organic brake linings that are made of
nonmetallic fibers bonded together to form a composite material
✔✔Proportioning valve- - ✔✔a pressure reduction valve used in the rear brake circuit
✔✔Quick take-up- - ✔✔a dual master cylinder that supplies a large volume of fluid to
the front disc brakes on initial brake application, which takes up the clearance of low-
drag calipers
✔✔Rotor- - ✔✔the rotating or freewheeling portion of a clutch; the belt slides on the
rotor
✔✔Semimetallic lining- - ✔✔brake friction materials made from a mixture of organic or
synthetic fibers and certain metals; they do not contain asbestos
✔✔Static friction- - ✔✔friction between two stationary objects or surfaces
✔✔Synthetic lining- - ✔✔brake friction materials made from nonorganic, nonmetallic,
and nonasbestos materials; typically fiberglass and aramid fibers
✔✔Vent port- - ✔✔the forward port in the master cylinder bore; it lets fluid pass between
each pressure chamber and its fluid reservoir during operation
✔✔Ventilated rotor- - ✔✔a motor that has cooling fins cast between the braking
surfaces to increase the cooling area of the rotor
✔✔1. Explain why bleeding air out of a hydraulic system is so important. - ✔✔Fluids
cannot be compressed, whereas gases are compressible. Any air in the hydraulic
system is compress as the pressure increases. This action reduces the amount of force
that can be transmitted by the fluid; therefore it is very important to keep all air out of the
hydraulic system
SOLUTIONS RATED A+
✔✔Cup seal-a - ✔✔circular rubber seal with a depressed center section surrounded by
a raised sealing lip to form a cup
✔✔Metallic linings- - ✔✔brake friction material made from powdered metal that is
formed into blocks by heat and pressure
✔✔Metering valve- - ✔✔a component that momentarily delays the application of front
disc brakes until the rear drum brakes begin to move. Helps to provide balanced braking
✔✔Nonasbestos organic linings (NAO)- - ✔✔organic brake linings that are made of
nonmetallic fibers bonded together to form a composite material
✔✔Proportioning valve- - ✔✔a pressure reduction valve used in the rear brake circuit
✔✔Quick take-up- - ✔✔a dual master cylinder that supplies a large volume of fluid to
the front disc brakes on initial brake application, which takes up the clearance of low-
drag calipers
✔✔Rotor- - ✔✔the rotating or freewheeling portion of a clutch; the belt slides on the
rotor
✔✔Semimetallic lining- - ✔✔brake friction materials made from a mixture of organic or
synthetic fibers and certain metals; they do not contain asbestos
✔✔Static friction- - ✔✔friction between two stationary objects or surfaces
✔✔Synthetic lining- - ✔✔brake friction materials made from nonorganic, nonmetallic,
and nonasbestos materials; typically fiberglass and aramid fibers
✔✔Vent port- - ✔✔the forward port in the master cylinder bore; it lets fluid pass between
each pressure chamber and its fluid reservoir during operation
✔✔Ventilated rotor- - ✔✔a motor that has cooling fins cast between the braking
surfaces to increase the cooling area of the rotor
✔✔1. Explain why bleeding air out of a hydraulic system is so important. - ✔✔Fluids
cannot be compressed, whereas gases are compressible. Any air in the hydraulic
system is compress as the pressure increases. This action reduces the amount of force
that can be transmitted by the fluid; therefore it is very important to keep all air out of the
hydraulic system
