Question 1

Before servicing a hydraulic power booster system, ______.

Accepted Answer

A)  disconnect the battery 
B)  drain the power steering reservoir 
C)  pump the brake pedal with the engine off until the pedal goes hard 
D)  open all four brake bleeders 
A)  disconnect the battery 
B)  drain the power steering reservoir 
C)  pump the brake pedal with the engine off until the pedal goes hard 
D)  open all four brake bleeders

Question 2

What is the function of the line printed along the length of a brake hose?

Accepted Answer

A)  It indicates that the hose has a neoprene liner 
B)  It ensures that the hose is orientated outward, toward the wheel 
C)  It indicates whether the hose is twisted 
D)  It indicates that the hose is mounted on the left side; right side hoses have no line 
A)  It indicates that the hose has a neoprene liner 
B)  It ensures that the hose is orientated outward, toward the wheel 
C)  It indicates whether the hose is twisted 
D)  It indicates that the hose is mounted on the left side; right side hoses have no line

Question 3

A technician is diagnosing a car that had both front brake hoses replaced 5,000 miles ago. An inspection reveals that the right front brake hose has ruptured. Technician A says the specifications called for DOT 3 fluid; using DOT 4 fluid caused the failure. Technician B says the brake hose was twisted and stressed too much when installed. Who is correct?

Accepted Answer

A)  A only 
B)  B only 
C)  both A and B 
D)  neither A nor B 
A)  A only 
B)  B only 
C)  both A and B 
D)  neither A nor B

Question 4

All master cylinders are made of cast iron.

Accepted Answer

A) True 
 B)False

Question 5

Describe the purpose of a height-sensing proportional valve.

Accepted Answer

A height-sensing proportional valve sens

Question 6

Residual check valves are found only on vehicles with rear disc brakes.

Accepted Answer

A) True 
 B)False

Question 7

What is a tandem master cylinder?

Accepted Answer

A tandem master cylinder is essentially

Question 8

In a drum brake assembly, the brake shoes are forced outward by pistons located inside the ____________________.

Accepted Answer

The answer of In a drum brake assembly, the brake...

Question 9

If a master cylinder with a 1 inch bore is replaced with a cylinder with a three-quarter inch bore, the pressure in the brake lines will be higher when the same amount of brake pedal pressure is applied to each cylinder.

Accepted Answer

A) True 
 B)False

Question 10

The power brakes in a vehicle are grabbing. Technician A checks for grease or oil on the brake shoe and pad linings. Technician B checks the fluid level in the master cylinder. Who is correct?

Accepted Answer

A)  A only 
B)  B only 
C)  both A and B 
D)  neither A nor B 
A)  A only 
B)  B only 
C)  both A and B 
D)  neither A nor B

Question 11

When bleeding a dual diagonal split brake system, the bleeding sequence is usually _____.

Accepted Answer

A)  LR-RR-RF-LF 
B)  RF-LF-LR-RR 
C)  RR-LF-LR-RF 
D)  LR-RF-RR-LF 
A)  LR-RR-RF-LF 
B)  RF-LF-LR-RR 
C)  RR-LF-LR-RF 
D)  LR-RF-RR-LF

Question 12

Brake fluid serves as a lubricant for the parts of the hydraulic system and ensures smooth and even operation.

Accepted Answer

A) True 
 B)False

Question 13

The function of the nitrogen-charged pneumatic accumulator on a hydraulic brake booster is to _____.

Accepted Answer

A)  prevent power steering fluid from mixing with brake fluid 
B)  provide reserve power assist pressure if the engine stalls 
C)  reduce boost pressure when pedal effort is less than 10 psi 
D)  hold return pressure until the brake pedal is released 
A)  prevent power steering fluid from mixing with brake fluid 
B)  provide reserve power assist pressure if the engine stalls 
C)  reduce boost pressure when pedal effort is less than 10 psi 
D)  hold return pressure until the brake pedal is released

Question 14

What does the term hygroscopic mean?

Accepted Answer

The abilit

Question 15

A dual brake system uses a ____________________ master cylinder.

Accepted Answer

The answer of A dual brake system uses a ____________________...

Question 16

In a master cylinder, the ____________________ [forward port] has been called a compensating port.

Accepted Answer

The answer of In a master cylinder, the ____________________ [forward...

Question 17

Power brakes are completely different than a standard hydraulic brake system, using different types of master cylinders, calipers, and hydraulic circuits.

Accepted Answer

A) True 
 B)False

Question 18

Technician A bleeds the brakes system manually with the help of an assistant. Technician B uses a pressure bleeder. Who is correct?

Accepted Answer

A)  A only 
B)  B only 
C)  both A and B 
D)  neither A nor B 
A)  A only 
B)  B only 
C)  both A and B 
D)  neither A nor B

Question 19

Factors that determine a vehicle's braking power are being discussed. Technician A says the coefficient of friction between the pad and rotor or shoe and drum is a factor. Technician B says heat dissipation from brake components is a factor. Who is correct?

Accepted Answer

A)  A only 
B)  B only 
C)  both A and B 
D)  neither A nor B 
A)  A only 
B)  B only 
C)  both A and B 
D)  neither A nor B

Question 20

Which of the following could cause an extremely hard brake pedal?

Accepted Answer

A)  air in the system 
B)  excessively worn brake pads 
C)  use of the wrong fluid 
D)  a leaking diaphragm in the vacuum power booster 
A)  air in the system 
B)  excessively worn brake pads 
C)  use of the wrong fluid 
D)  a leaking diaphragm in the vacuum power booster

Exam 50: Brake Systems

Before servicing a hydraulic power booster system, ______.

What is the function of the line printed along the length of a brake hose?

All master cylinders are made of cast iron.

Describe the purpose of a height-sensing proportional valve.

Residual check valves are found only on vehicles with rear disc brakes.

What is a tandem master cylinder?

In a drum brake assembly, the brake shoes are forced outward by pistons located inside the ____________________.

If a master cylinder with a 1 inch bore is replaced with a cylinder with a three-quarter inch bore, the pressure in the brake lines will be higher when the same amount of brake pedal pressure is applied to each cylinder.

The power brakes in a vehicle are grabbing. Technician A checks for grease or oil on the brake shoe and pad linings. Technician B checks the fluid level in the master cylinder. Who is correct?

When bleeding a dual diagonal split brake system, the bleeding sequence is usually _____.

Brake fluid serves as a lubricant for the parts of the hydraulic system and ensures smooth and even operation.

The function of the nitrogen-charged pneumatic accumulator on a hydraulic brake booster is to _____.

What does the term hygroscopic mean?

A dual brake system uses a ____________________ master cylinder.

In a master cylinder, the ____________________ [forward port] has been called a compensating port.

Power brakes are completely different than a standard hydraulic brake system, using different types of master cylinders, calipers, and hydraulic circuits.

Technician A bleeds the brakes system manually with the help of an assistant. Technician B uses a pressure bleeder. Who is correct?

Factors that determine a vehicle's braking power are being discussed. Technician A says the coefficient of friction between the pad and rotor or shoe and drum is a factor. Technician B says heat dissipation from brake components is a factor. Who is correct?

Which of the following could cause an extremely hard brake pedal?

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