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Brake Design > Chapter 1 > Flashcards

Chapter 1 Flashcards

1
Q

______________ braking systems use electrical generators to help slow the vehicle during gradual stops and help recharge the electric batteries.

A

REGENERATIVE

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2
Q

The _______________ _______________ is mounted on a lever with a pivot near the top of the lever.

A

BRAKE PEDAL

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3
Q

Modern automotive _______________ _______________were developed from aircraft brakes of World War II.

A

BRAKE PADS

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4
Q

Disc _______________ _______________ are mounted in a caliper that sits above the spinning rotor.

A

BRAKE PADS

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5
Q

The _______________ _______________ is the start of the brake hydraulic system.

A

MASTER CYLINDER

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6
Q

All master cylinders for vehicles built since 1967 have _______________ _______________ and pumping chambers

A

2 PISTONS

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7
Q

There are two types of split systems: _______________ and front/rear.

A

DIAGONAL

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8
Q

The electronic function of the proportioning valve has been called “_______________ _______________ _______________” and “_______________ _______________ _______________” by various manufacturers

A

“DYNAMIC REAR PROPORTIONING”
“ELECTRONIC BRAKE DISTRIBUTION”

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9
Q

Most systems with drum brakes have a single, _______________ cylinder at each wheel.

A

TWO-PISTON

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10
Q

The ABS does the same thing as an _______________ _______________ would, only it does it faster and more precisely.

A

EXPERIENCED DRIVER

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11
Q

Technician A says all the friction components of a disc brake are exposed to the airstream. Technician B says this helps to cool the brake parts and maintain braking effectiveness during repeated hard stops from high speeds. Who is correct?
A. A only C. Both
B. B only D. Neither

A

BOTH

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12
Q

Technician A says that with a fixed caliper, hydraulic pressure is applied to pistons on both sides to force the pads against the rotor. Technician B says that with a movable caliper, pressure is applied to a piston on the outboard side only. Who is correct?
A. A only B. B only
C. Both
D. Neither

A

A ONLY

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13
Q

Technician A says drum brakes do not develop the mechanical servo action that you will learn about as you study drum brakes. Technician B says drum brakes require higher hydraulic pressure and greater force to achieve the same stopping power as a comparable disc brake. Who is correct?

A

D NEITHER

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14
Q

While discussing the brake stroke sensor, Technician A says the brake stroke sensor informs the brake controller how fast the brake pedal is being pushed down. Technician B says the stroke sensor also informs the controller how much pressure the driver is applying to the brakes.

A

C BOTH

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15
Q

Technician A says the stroke simulator is used to make hybrid brake application feel normal to the driver. Technician B says the stroke simulator is an electrical switch for the brake lamps. Who is correct?

A

A ONLY

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16
Q

Technician A says that all new vehicles have metering and proportioning valves. Technician B says that the function of these valves has been taken over by the ABS system on most vehicles. Who is correct?

A

B ONLY

17
Q

While discussing wheel cylinders and caliper pistons, Technician A says wheel cylinders of drum brakes operate in response to the master cylinder. Technician B says the caliper pistons of disc brakes operate in response to the wheel cyl- inders. Who is correct?

A

A ONLY

18
Q

Technician A says almost all brake systems have a power booster that increases the force of the driver’s foot on the pedal. Technician B says most cars and light trucks use a vacuum booster that uses the combined effects of engine vacuum and atmospheric pressure to increase pedal force.

A

C. BOTH

19
Q

Technician A says some vehicles without a ready vacuum source may have a hydraulic power booster. Technician B says the hydraulic booster can be supplied with fluid by the power steering system or may be a part of the brake system and driven by an electric motor. Who is correct?

A

C BOTH

20
Q

Technician A says automatic ride control (ARC) is an electronic braking system designed to provide a more comfortable ride. Technician B says ARC also allows betters control of the vehicle during cornering. Who is correct?

A

C BOTH

21
Q

Name the four basic functions of the braking system

A
  1. Slow car
  2. stop car
  3. keep car in place
  4. allows directional control during max braking
22
Q

Breifly describe the modern master cylinder

A

Reservoir, piston, fluid springs. Takes movement from the brake pedal with the lever and push fluid creating increasing hyraulic pressure using pascals law

23
Q

Briefly describe why the split system is needed on modern vehicles

A

Creates stability in case of failure. If one line fails you still have stopping cabability during braking

24
Q

Desribe the purpose of the brake stroke sensor on a hybrid vehicle

A

Tell the brake actuator how fast and how far the driver applie the brake pedal

25
Q

Describe regenerative breaking

A

Takes kinetic energy from the wheels to turn an electric generator to recharge batteries

26
Q

Describe the lines and hoses used on vehicle braking systems

A

Double sealed, flexible to accomodate motion, coated to protect from corrosion double walled and seamless

27
Q

Why is it wrong to call the parking brake an emergency brake

A

Should only be used to keep the car stopped as opposed to a service brake

28
Q

Describe waht is meant by negative wheel slip.

A

When bakes are applied with enough pressure and stop the wheels from rotating. Called lock up

29
Q

Explain how the traction control system works to control wheel spin

A

Controls positive wheel spin - can reduce engine power via throttle control, reduce engine timing through ecm and apply brakes to the spinning wheel

30
Q
  1. Describe the two types of split hydraulic systems.
A

Diagonal, Front to back

Brake Design (4 decks)

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