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brake > Chapter 7 > Flashcards

Chapter 7 Flashcards

1
Q

List the basic parts of a disc brake.

A

rotor, brake pads, caliper, hub

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2
Q

Explain the advantages and disadvantages of an aluminum caliper.

A

less weight, but more expensive

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3
Q

Why do manufacturers use two-piece rotors on some vehicles?

A

less expensive/lighter, floating rotor

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4
Q

In addition to keeping road splash off the brake assembly, why are splash shields used on disc brakes?

A

help maintain vehicles braking performance

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5
Q

Why is asbestos no longer used for brake pad and shoe linings?

A

health hazards

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6
Q

What are common classifications of brake pad and shoe friction materials?

A

organic, semi-metallic, ceramic

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7
Q

What is the difference between fixed and sliding calipers?

A

Fixed caliper is bolted to the support and doesn’t move the brakes when applied

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8
Q

How does a low-drag caliper operate?

A

separates the brake pard from the rotor so its doesn’t rub

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9
Q

Explain how a floating caliper applies the brake pads.

A

the brakes are applied evenly to all areas to ensure equal brakes performance

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10
Q

Explain the purpose of a drum-in-hat rotor.

A

bypasses the hydraulic braking system to stop the car in an emergency

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11
Q

Front calipers are mounted on ____ _____ or adapters that may be an integral part of the steering knuckles.

A

caliper supports

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12
Q

When any brake installation reaches its limit of heat dissipation, ______ _______ sets in.

A

brake fade

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13
Q

________ rotors are made of different materials, usually cast iron and steel, to reduce weight.

A

composite

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14
Q

_______ linings usually wear faster than do semi-metallic linings, but they have the benefit of breaking in faster.

A

organic

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15
Q

With disc brakes most of the ________ area is cooling while only a small area directly contacts the friction materials at any given time.

A

swept

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16
Q

Disc brakes do not suffer from _______ fade because the rotor does not expand away from the pads.

A

mechanical

17
Q

Low-drag calipers require a quick take-up _______ cylinder.

A

master

18
Q

The _____ converts hydraulic pressure from the master cylinder to mechanical force.

A

caliper

19
Q

Many rear disc brakes have a small brake drum built into the center of the_______.

A

rotor

20
Q

Sliding or floating calipers have a piston only on the ______ side.

A

inboard

21
Q

The advantages and disadvantages of disc brake systems are being discussed.

Technician A says that disc brakes are more likely to develop brake fade and water fade.

Technician B says that reduction of mechanical fade and gas fade is an advantage of disc brakes.

A

b

22
Q

The operation of disc brake systems is being discussed.

Technician A says that composite rotors were developed to save weight.

Technician B says that a fixed rotor assembly is part of the hub.

Who is correct?

A

c

23
Q

Disc brake calipers are being discussed.

Technician A says that a single caliper may have one, two, or more pistons.

Technician B says that the piston seal is known as a square-cut seal.

Who is correct?

A

c

24
Q

Technician A says that solid rotors can usually be machined several times before their minimum thickness limits are reached.

Technician B says that composite rotors have cast-iron hubs with steel friction surfaces.

Who is correct?

A

d

25
Q

When discussing disc brake work,

Technician A says that organic linings are a composite material made from bonding nonmetallic fibers.

Technician B says that semi-metallic linings require higher brake pedal effort but are more fade resistant compared to organic linings.

Who is correct?

A
26
Q

Two technicians are discussing a disc brake caliper:

Technician A says that calipers use springs to retract the seals after a brake application.

Technician B says that sliding calipers typically use one piston on each side of the rotor.

Who is correct?

A

d

27
Q

Technician A says that a return spring is used to retract a caliper piston.

Technician B says that the piston seal retracts the caliper piston when hydraulic pressure is released.

Who is correct?

A

b

28
Q

Technician A says that inner and outer pad friction materials may have different coefficients of friction.

Technician B says to follow the manufacturer’s recommendation for inboard and outboard pad linings when replacing brake pads.

Who is correct?

A

a

29
Q

Technician A says that when the driver hears the audible brake pad wear indicator, he or she should immediately park the car and not use it until the brakes are replaced.

Technician B says that the wear pad indicators alert the driver to worn pads that should be replaced soon.

Who is correct?

A

b

brake (6 decks)

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