Chapter 5

Question 1

Explain why 100% copper line should never be used as brake lines.

Answer 1

copper lines cant hold the pressure required

Question 2

Describe an ISO flare.

Answer 2

an iso flare is a fitting with a flare on the end but not folded back onto its self

Question 3

Why are brake hoses marked with raised ribs or colored stripes?

Answer 3

They are marked with strips to prevent twisting during assembly

Question 4

Describe how an internal brake hose problem can cause brake pull and/or brake drag.

Answer 4

when the inside of the hose wears and it creates a flap

Question 5

Describe how a leak-free fitting is achieved with SAE flare fittings.

Answer 5

The 3-degree mismatch provides a leak free connection

Question 6

Describe why a double flare is a better choice than a single flare.

Answer 6

its much stronger than a single flare, seal is formed with tubing flare/ seat. not with threads

Question 7

Explain how the ABS system has taken the place of many of the hydraulic control valves.

Answer 7

The ABS system its more precise than the hydraulic control valves

Question 8

Describe the electronic brake pad wear indicator system used on some vehicles

Answer 8

when the brake pads get worn down a light on the dash will indicate that they need to be replaced

Question 9

Explain the operation of the BPP sensor.

Answer 9

The BPP tells the computers how far/fast the brakes have been applied

Question 10

Describe an ISO fitting.

Answer 10

An ISO fitting provides a good seal within the system

Question 11

Brake lines or tubing consist of _______tubes or pipes and flexible ________connected with fittings.

Answer 11

steel, hoses

Question 12

There are two common types of flares formed on the end of brake tubing, the _________ flare and the ________ flare.

Answer 12

ISO, Double

Question 13

SAE Standard J1047 requires that an 18-inch length of tubing must withstand an internal pressure of ________ psi.

Answer 13

8000

Question 14

An ISO flare is not ________ on itself as is a double flare.

Answer 14

folded back

Question 15

_______ fittings have become popular with both domestic and foreign vehicle manufacturers.

Answer 15

ISO

Question 16

Straight ________ fittings are usually found on the ends of brake hoses that attach to calipers or wheel cylinders.

Answer 16

compression washer

Question 17

A ________ is used to attach a hose or tube to a port on a cylinder or caliper at a close right angle

Answer 17

Banjo Fitting

Question 18

Late-model vehicles use a _______ position sensor in place of brake lamp switches.

Answer 18

brake pedal

Question 19

The brake lamps, turn signals, and hazard flashers on many late-model vehicles are operated by a ________ connected to the computer network.

Answer 19

lighting module

Question 20

The ________ switch has replaced the pressure differential valve warning switch on most vehicles.

Answer 20

failure warning lamp

Question 21

Technician A says that a 100 percent copper tube is often used as a brake line material.

Technician B says there is a copper-nickel alloy brake tubing that meets SAE Standard J1047 and ISO 4038. Who is correct?

Answer 21

B

Question 22

The flare on the end of a brake line has a bubble, or ball, shape.

Technician A says that this is a bubble flare.

Technician B says that this is an ISO fitting. Who is correct?

Answer 22

C

Question 23

Technician A says fittings with an external taper is simply called a standard flare.

Technician B says a fitting with an internal taper is called an inverted or LAP flare. Who is correct?

Question 24

Technician A says that a metering valve delays the application of the rear drum brakes.

Technician B says that the metering valve is only needed on four-wheel disc brake vehicles. Who is correct?

Answer 24

d

Question 25

Technician A says on many vehicles the lighting module controls the brake lamps and turn signals.

Technician B says that these vehicles use the turn signal switch as an input to the lighting module. Who is correct?

Answer 25

C

Question 26

Technician A says that a proportioning valve provides greater pressure to the rear drum brakes during normal vehicle load.

Technician B says that a proportioning valve provides lower pressure to the front disc brakes during initial brake application. Who is correct?

Answer 26

d

Question 27

While discussing electrically actuated parking brakes,

Technician A says these systems operate via electric actuators located on the rear brake calipers, or by electric cable actuators.

Technician B says these actuators are controlled by their own control module. Who is correct?

Question 28

Technician A says some vehicles use tubing sized in metric diameters.

Technician B says some common metric diameters are 4.75 mm, 6 mm, 8 mm, and 10 mm. Who is correct?

Answer 28

C

Question 29

While discussing mechanical brake lamp switches,

Technician A says the stop-lamp switch is a normally open momentary contact switch.

Technician B says the same circuit is used to alert the ABS to monitor wheel speed sensors during braking. Who is correct?

Answer 29

c

Question 30

While discussing brake pad wear indicators,

Technician A says that many brake pads utilize a simple scraper built into the brake pad itself that touches the rotor when the pads wear down.

Technician B says the scraping sound goes away when the brakes are released. Who is correct?