Deck 10: Brakes Systems

Question 1

Pascal's Law applies to brake systems.

Answer 1

True

Question 2

Metering valves hold the rear brakes off until the front brakes have applied.

Answer 2

False

Question 3

Two technicians are discussing pressure controllers. Technician A says that RWAL systems have only one solenoid for each wheel or axle. Technician B says the isolation/dump valve for a RWAL system may be referred to as the RWAL accumulator. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Answer 3

A

Question 4

What statement is true about ABS systems?

A) ABS was designed to shorten stopping distance.
B) ABS systems require speed sensors on the ABS-equipped axles.
C) ABS systems require vacuum controllers.
D) ABS systems require a mechanical controller.

Question 5

Two technicians are discussing brake fluid. Technician A says that different DOT fluid numbers can be mixed without affecting performance. Technician B says that silicone brake fluid can be used in any braking system and can be mixed with other DOT levels. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 6

Two technicians are discussing power boosters. Technician A says that vacuum is the only source of power for a booster. Technician B says that hydro-boost is powered by the vehicle's power steering pump. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 7

Traction control is meant to assist on slick road surfaces and in mud-bogging.

Question 8

Two technicians are discussing brake operation. Technician A says that return springs cause the brake components to engage when the brake pedal is pressed. Technician B says that return springs are on the brake pedal, the master cylinder, and at any drum brake shoes. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 9

Proportioning valves control the amount of pressure that the front and rear brakes receive during braking.

Question 10

An output piston that is larger than the input piston can increase the input force.

Question 11

Two technicians are discussing disc brakes. Technician A says that disc brake pads are much smaller than drum brake shoes. Technician B says that more hydraulic force is needed to stop a disc brake vehicle. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 12

Two technicians are discussing disc brake calipers. Technician A says that sliding calipers work similar to a wheel cylinder except the caliper can move as a unit. Technician B says that fixed calipers have a minimum of five pistons. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 13

Two technicians are discussing hydraulic theory. Technician A says that liquids cannot be compressed and make ideal transmitting agents when contained in sealed systems . Technician B says that when pressurized, the temperature of liquids increase. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 14

Some drum brakes have a form of self-adjuster to move the brake shoes outward as they wear.

Question 15

Brake fluid should have a minimum boiling point of 200 degrees Fahrenheit.

Question 16

Tires are considered to be part of the braking system.

Question 17

What characteristic is true of traction control systems?

A) Traction control is a method of redirecting power from a spinning drive wheel.
B) Traction control does not include electronics.
C) Traction control was designed for hard acceleration from a stop.
D) Traction control was designed for competitive driving.

Question 18

Brake boosters have a check valve to retain vacuum in case of an engine shutdown.

Question 19

The brake pedal is connected to the master cylinder's piston with a(n) _____.

A) wire
B) pushrod
C) vacuum brake booster
D) hydro-boost valve

Question 20

Bearing races serve the same purpose as the journal.

Question 21

What are some necessary qualities of brake fluid?

Question 22

What type of brake booster utilizes power steering pressure to operate?

Question 23

What type of caliper has at least four pistons?

Question 24

What type of valve controls brake pressure to the rear brakes depending on vehicle load?

Question 25

What component contacts the disc brake pad in order to slow a vehicle?

Question 26

What is the purpose of a bushing?

Question 27

What is the metal portion of a brake shoe normally called?

Question 28

Two technicians are discussing parking brakes. Technician A says that a parking brake can be used to stop a vehicle rather than using the brake pedal. Technician B says that the parking brake is only meant to hold a vehicle stationary after the vehicle is stopped by the main braking system. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 29

What type of brake uses a wheel cylinder?

Question 30

What type of solenoid does a RWAL system use to control the rear brakes?

Question 31

Two technicians are discussing proportioning valves. Technician A says proportioning valves are designed to keep the disc brakes from applying before the drums. Technician B says that load-sensing proportioning valves sense vehicle load and adjust brake pressure. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 32

Describe Pascal's Law in words.

Question 33

Describe the operation of servo action.

Question 34

What is the name for a fluid that absorbs moisture?

Question 35

What type of traction control has four modes of operation?

Question 36

Brake lines are made of _____ with flared fittings at each end.

A) steel
B) copper
C) aluminum
D) carbon

Question 37

Two technicians are discussing brake warning lights. Technician A says that the brake warning light alerts drivers to problems with the braking system. Technician B says the light only reminds the driver to release the parking brake. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 38

Why is the air valve opening metered in a brake booster?

Question 39

What type of brake system has been required since 1967?

A) Single piston
B) Dual or split
C) Front/rear
D) Reservoir

Question 40

Describe the construction of a master cylinder body.