Question 1

Technician A says that drum brakes can fail to slow the vehicle if driven through deep water. Technician B says that when drum brakes get hot, the brake pedal will drop because the drum expands away from the shoes. Which technician is correct?

Accepted Answer

A)  Technician A only
B)  Technician B only
C)  Both Technicians A and B
D)  Neither technician A nor BE) All of the above
F) B) and C)

Question 2

A typical drum brake uses how many hold-down springs?

Accepted Answer

A)  1
B)  6
C)  4
D)  2E) None of the above
F) A) and D)

Question 3

A typical drum brake backing-plate has how many shoe support pads (also called ledges) ?

Accepted Answer

A)  4
B)  8
C)  3
D)  6E) B) and C)
F) A) and D)

Question 4

Brake drum rotation de-energizes the trailing shoe.

Accepted Answer

A) True 
 B)False

Question 5

Brake shoe holddowns are used to reduce brake noise.

Accepted Answer

A) True 
 B)False

Question 6

Which lining does most of the braking on a leading/trailing brake?

Accepted Answer

A)  Depends on the speed of the vehicle
B)  Trailing (rearward facing) 
C)  Both contribute equally
D)  Leading (forward facing) E) C) and D)
F) B) and C)

Question 7

Two technicians are discussing drum brake self-adjusters. Technician A says that some brakes self-adjust when the brakes are released when the vehicle is driven in reverse. Technician B says that some brakes self-adjust when the brakes are applied rather than when released. Which technician is correct?

Accepted Answer

A)  Technician A only
B)  Technician B only
C)  Both Technicians A and B
D)  Neither technician A nor BE) A) and B)
F) B) and C)

Question 8

The dual-servo brake is more powerful than any non-servo design.

Accepted Answer

A) True 
 B)False

Question 9

Two technicians are discussing brake lining edge codes. Technician A says that the code can identify the manufacturer. Technician B says that all friction material from the same manufacturer will have the same edge codes. Which technician is correct?

Accepted Answer

A)  Technician A only
B)  Technician B only
C)  Both Technicians A and B
D)  Neither technician A nor BE) B) and C)
F) None of the above

Question 10

________ action uses the stopping power of one shoe to help increase the application force of the other shoe.

Accepted Answer

A)  Centrifugal
B)  Servo
C)  Self-energizing
D)  CentripetalE) A) and B)
F) B) and C)

Question 11

Trailing shoes generally wear at a faster rate than leading shoes.

Accepted Answer

A) True 
 B)False

Question 12

In a servo brake, the secondary shoe provides approximately what percentage of the total stopping power?

Accepted Answer

A)  30
B)  75
C)  70
D)  55E) A) and D)
F) A) and B)

Question 13

The brakes on a dual-servo drum system are designated as ________.

Accepted Answer

A)  Two leading shoes
B)  Primary and secondary
C)  Leading and trailing
D)  None of the aboveE) A) and C)
F) C) and D)

Question 14

On the dual-servo braking system, which shoe does most of the braking during forward movement of the vehicle?

Accepted Answer

A)  The secondary shoe
B)  The primary shoe
C)  Both A and B
D)  None of the aboveE) All of the above
F) None of the above

Question 15

The shoe support pads ________.

Accepted Answer

A)  Hold the shoes against the drum when the parking brake is applied
B)  Prevent the wheel cylinder pistons from coming out of their bores
C)  Are lightly coated with silicone brake grease to minimize wear
D)  Prevent the brake shoes from rotating with the drumE) All of the above
F) A) and D)

Question 16

Identify the parking brake strut in this illustration.

Accepted Answer

A)  A
B)  B
C)  C
D)  DE) A) and B)
F) None of the above

Question 17

Cup expanders are used in some wheel cylinders to ________.

Accepted Answer

A)  Help the cups seal against high pressure
B)  Allow for wear on the cylinder walls
C)  Allow for the expansion of the fluid as the temperature increases
D)  Hold the lips of the cups against the cylinder wallsE) B) and D)
F) A) and D)

Exam 99: Drum Brakes

Cup expanders are used in some wheel cylinders to ________.

Correct Answer
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Correct Answer
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Technician A says that drum brakes can fail to slow the vehicle if driven through deep water. Technician B says that when drum brakes get hot, the brake pedal will drop because the drum expands away from the shoes. Which technician is correct?

Correct Answer
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Identify the parking brake strut in this illustration.

Correct Answer
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On the dual-servo braking system, which shoe does most of the braking during forward movement of the vehicle?

Correct Answer
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The shoe support pads ________.

Correct Answer
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Brake shoe holddowns are used to reduce brake noise.

Correct Answer
verified

________ action uses the stopping power of one shoe to help increase the application force of the other shoe.

Correct Answer
verified

Brake drum rotation de-energizes the trailing shoe.

Correct Answer
verified

The dual-servo brake is more powerful than any non-servo design.

Correct Answer
verified

The brakes on a dual-servo drum system are designated as ________.

Correct Answer
verified

Trailing shoes generally wear at a faster rate than leading shoes.

Correct Answer
verified

Which lining does most of the braking on a leading/trailing brake?

Correct Answer
verified

A typical drum brake uses how many hold-down springs?

Correct Answer
verified

Two technicians are discussing brake lining edge codes. Technician A says that the code can identify the manufacturer. Technician B says that all friction material from the same manufacturer will have the same edge codes. Which technician is correct?

Correct Answer
verified

In a servo brake, the secondary shoe provides approximately what percentage of the total stopping power?

Correct Answer
verified

A typical drum brake backing-plate has how many shoe support pads (also called ledges) ?

Correct Answer
verified

Exam 99: Drum Brakes

Cup expanders are used in some wheel cylinders to ________.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Technician A says that drum brakes can fail to slow the vehicle if driven through deep water. Technician B says that when drum brakes get hot, the brake pedal will drop because the drum expands away from the shoes. Which technician is correct?

Correct AnswerverifiedShow Answer

Identify the parking brake strut in this illustration.

Correct AnswerverifiedShow Answer

On the dual-servo braking system, which shoe does most of the braking during forward movement of the vehicle?

Correct AnswerverifiedShow Answer

The shoe support pads ________.

Correct AnswerverifiedShow Answer

Brake shoe holddowns are used to reduce brake noise.

Correct AnswerverifiedShow Answer

________ action uses the stopping power of one shoe to help increase the application force of the other shoe.

Correct AnswerverifiedShow Answer

Brake drum rotation de-energizes the trailing shoe.

Correct AnswerverifiedShow Answer

The dual-servo brake is more powerful than any non-servo design.

Correct AnswerverifiedShow Answer

The brakes on a dual-servo drum system are designated as ________.

Correct AnswerverifiedShow Answer

Trailing shoes generally wear at a faster rate than leading shoes.

Correct AnswerverifiedShow Answer

Which lining does most of the braking on a leading/trailing brake?

Correct AnswerverifiedShow Answer

A typical drum brake uses how many hold-down springs?

Correct AnswerverifiedShow Answer

Two technicians are discussing brake lining edge codes. Technician A says that the code can identify the manufacturer. Technician B says that all friction material from the same manufacturer will have the same edge codes. Which technician is correct?

Correct AnswerverifiedShow Answer

In a servo brake, the secondary shoe provides approximately what percentage of the total stopping power?

Correct AnswerverifiedShow Answer

A typical drum brake backing-plate has how many shoe support pads (also called ledges) ?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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