Brakes I - AUT 120 - Chapter 103 - Drum Brakes || All
Accurate 100%.
Brake fade correct answers ________________ is the loss of stopping power that occurs
when excessive heat reduces the friction between the brake shoe linings and the drum.
Mechanical fade correct answers _________________________ occurs when the brake drum
gets so hot that it expands away from the brake linings. The brake shoes then move outward
to maintain contact with the drum, causing the brake pedal to drop toward the floor as
additional brake fluid moves into the hydraulic system.
Lining fade correct answers ________________ occurs when the friction coefficient of the
brake lining material drops off sharply because intense heat makes it "slippery." Unlike
mechanical fade, brake pedal travel does not increase when lining fade occurs. Instead, the
pedal becomes hard and there is a noticeable loss of braking power.
Gas fade correct answers ______________ occurs under extended hard braking from high
speeds. A thin layer of hot gases and dust particles can build up between the brake shoe
linings and drum. The gas layer acts as a lubricant and reduces friction. As with the lining
fade, the brake pedal becomes hard, and greater application force is required to maintain a
constant level of stopping power.
Water fade correct answers ______________ occurs when moisture is trapped between the
shoes and drum, where it acts as a lubricant. This lowers braking efficiency until friction
creates enough heat to evaporate the water. Brake Adjustment
labyrinth seal correct answers A ______________________ is created between the lip of the
backing plate and the groove in the brake drum.
Shoe anchors correct answers ___________________ prevent the brake shoes from rotating
with the drum when the brakes are applied. The majority of drum brakes have a single
anchor, but some drum brake designs use two or more.
piston stops correct answers Some backing plates incorporate __________________ that
prevent the wheel cylinder pistons from coming out of their bores when the friction assembly
is disassembled for servicing.
shoe support pads; ledges; shoe contact areas correct answers The
____________________________ are stamped into the backing plate and contact the edges
of the brake shoes to keep the linings properly aligned with the center of the friction surface
inside the brake drum. These pads are also called ______________ or
___________________________.
brake shoes correct answers The linings of drum brakes are attached to curved metal
assemblies called _________________.
The web and the lining table correct answers Steel brake shoes are made from two stampings
welded together:
Accurate 100%.
Brake fade correct answers ________________ is the loss of stopping power that occurs
when excessive heat reduces the friction between the brake shoe linings and the drum.
Mechanical fade correct answers _________________________ occurs when the brake drum
gets so hot that it expands away from the brake linings. The brake shoes then move outward
to maintain contact with the drum, causing the brake pedal to drop toward the floor as
additional brake fluid moves into the hydraulic system.
Lining fade correct answers ________________ occurs when the friction coefficient of the
brake lining material drops off sharply because intense heat makes it "slippery." Unlike
mechanical fade, brake pedal travel does not increase when lining fade occurs. Instead, the
pedal becomes hard and there is a noticeable loss of braking power.
Gas fade correct answers ______________ occurs under extended hard braking from high
speeds. A thin layer of hot gases and dust particles can build up between the brake shoe
linings and drum. The gas layer acts as a lubricant and reduces friction. As with the lining
fade, the brake pedal becomes hard, and greater application force is required to maintain a
constant level of stopping power.
Water fade correct answers ______________ occurs when moisture is trapped between the
shoes and drum, where it acts as a lubricant. This lowers braking efficiency until friction
creates enough heat to evaporate the water. Brake Adjustment
labyrinth seal correct answers A ______________________ is created between the lip of the
backing plate and the groove in the brake drum.
Shoe anchors correct answers ___________________ prevent the brake shoes from rotating
with the drum when the brakes are applied. The majority of drum brakes have a single
anchor, but some drum brake designs use two or more.
piston stops correct answers Some backing plates incorporate __________________ that
prevent the wheel cylinder pistons from coming out of their bores when the friction assembly
is disassembled for servicing.
shoe support pads; ledges; shoe contact areas correct answers The
____________________________ are stamped into the backing plate and contact the edges
of the brake shoes to keep the linings properly aligned with the center of the friction surface
inside the brake drum. These pads are also called ______________ or
___________________________.
brake shoes correct answers The linings of drum brakes are attached to curved metal
assemblies called _________________.
The web and the lining table correct answers Steel brake shoes are made from two stampings
welded together:
