Chapter #46 Review Questions On Disc Brakes

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| By Dakota067

Dakota067

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Quizzes Created: 4 | Total Attempts: 6,285

Questions: 28 | Attempts: 185 | Updated: Mar 20, 2023

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Car brakes are usually what stand between you and jumping a red light or hitting the car in front of you. Having covered the topic on brakes the various types and functionality you can now be seen as well equipped to handle them. Take up the quiz and gauge your understanding.

Questions and Answers

1.

The proportioning valve holds off the front disc brakes.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
The proportioning valve does not hold off the front disc brakes. It is responsible for regulating the pressure of the brake fluid between the front and rear brakes to ensure balanced braking. This helps prevent the rear brakes from locking up during hard braking. Therefore, the correct answer is False.

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1
0
2.

COF stands for (Cold Optimum Friction)
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
The given statement is false. COF does not stand for "Cold Optimum Friction." COF actually stands for "Coefficient of Friction," which is a dimensionless quantity that represents the ratio of the force of friction between two bodies to the force pressing them together. The coefficient of friction is used to quantify the amount of friction between two surfaces and is an important factor in determining the ease or difficulty of movement between them.

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3.

Aluminum master cylinders can be honed to a maximum size of .002
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
Aluminum master cylinders cannot be honed to a maximum size of .002. This statement is false because aluminum is a soft metal and honing it to such a size would result in a weak and potentially unsafe master cylinder.

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4.

Servo action is increasing the size of the master cylinder piston.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
Servo action actually reduces the effort required by the driver to apply the brakes. It achieves this by using a vacuum or hydraulic pressure to assist in applying force to the master cylinder piston. This assistance allows for a smaller master cylinder piston size, as the servo action amplifies the force exerted by the driver. Therefore, the given statement that servo action increases the size of the master cylinder piston is incorrect.

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5.

If the brake pedal sinks slightly when the engine is started, this is a sign that the master cylinder is bypassing.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
If the brake pedal sinks slightly when the engine is started, it is not necessarily a sign that the master cylinder is bypassing. There can be other reasons for this issue, such as air in the brake lines or a faulty brake booster. Therefore, the statement is false.

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6.

Residual check valves are used on diagonally split hydraulic systems.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
Residual check valves are not used on diagonally split hydraulic systems. Diagonally split hydraulic systems typically use a combination valve that includes a metering valve, proportioning valve, and pressure differential switch. The purpose of these valves is to ensure that the front and rear brakes receive the appropriate amount of hydraulic pressure to maintain proper braking balance. Residual check valves, on the other hand, are used to maintain a small amount of residual pressure in the brake system to prevent air from entering the lines and to keep the brake shoes or pads close to the drums or rotors.

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7.

The compensating port is part of the combination valve.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
The compensating port is not part of the combination valve.

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8.

The best way to tell if a hydraulic system is diagoinally split is to count the number of brake lines coming from the master cylinder.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
The statement is false because the number of brake lines coming from the master cylinder does not determine if a hydraulic system is diagonally split. Diagonal split refers to a braking system where the front left and rear right wheels are on one circuit, while the front right and rear left wheels are on another circuit. This arrangement provides better stability and control during braking. The number of brake lines may vary depending on the specific design of the hydraulic system, but it does not indicate whether it is diagonally split or not.

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9.

To test a brake system for air have someone push the brake pedal while observing the fluid in the reservoir.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
The correct answer is False because to test a brake system for air, the correct procedure is to bleed the brake lines to remove any air bubbles. Observing the fluid in the reservoir while someone pushes the brake pedal will not provide an accurate indication of the presence of air in the brake system.

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10.

An example of kinetic friction is a locked brake with no motion.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
The statement is false because kinetic friction is the force that opposes the relative motion between two surfaces in contact. In the given example, a locked brake with no motion would not have any relative motion between the brake pad and the wheel, so there would be no kinetic friction present.

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11.

Dot 3 brake fluid is clear or amber
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
Dot 3 brake fluid is clear or amber in color. This means that when you look at the brake fluid, it will either appear transparent or have a slight amber tint. The color of brake fluid can vary depending on the specific brand or manufacturer, but in general, Dot 3 brake fluid is clear or amber.

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12.

What does friction produce?
13.

Name 2 types of power brakes in use:
14.

Hydraulic brakes work on the principle that liquids are not what?
15.

Brake fluid will___ the paint of a car
16.

How often should brake fluid be changed on a car without abs? Every__years
17.

The majority of brake noise is caused by______
18.

How much force would you get from 80 PSI applied to a 2 in. square piston?
19.

List 5 properties of brake fluid.
20.

P.S.I stands for?
21.

When brakes get to hot and no longer stop the car this is referred to as;
22.

What type of hydraulic brake system is usually found on F.W.D. cars?
23.

Divide the weight into the number of pounds of pull to move an object is a description of the term.
24.

The hydraulic system is used to transmit pressure, force and___
25.

Stopping distance is determined by: Driver reaction time. Weight of the vehicle. and
26.

The main difference between DOT 3 and DOT 4 brake fluid is?
27.

List 3 methods used to bleed the hydraulic brake system?
28.

Name 3 things that can turn on a red brake light.

Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

Current Version
Mar 20, 2023

Quiz Edited by
ProProfs Editorial Team
Feb 28, 2009

Quiz Created by
Dakota067

Chapter #46 Review Questions On Disc Brakes

The proportioning valve holds off the front disc brakes.

COF stands for (Cold Optimum Friction)

Aluminum master cylinders can be honed to a maximum size of .002

Servo action is increasing the size of the master cylinder piston.

If the brake pedal sinks slightly when the engine is started, this is a sign that the master cylinder is bypassing.

Residual check valves are used on diagonally split hydraulic systems.

The compensating port is part of the combination valve.

The best way to tell if a hydraulic system is diagoinally split is to count the number of brake lines coming from the master cylinder.

To test a brake system for air have someone push the brake pedal while observing the fluid in the reservoir.

An example of kinetic friction is a locked brake with no motion.

Dot 3 brake fluid is clear or amber

What does friction produce?

Name 2 types of power brakes in use:

Hydraulic brakes work on the principle that liquids are not what?

Brake fluid will___ the paint of a car

How often should brake fluid be changed on a car without abs? Every__years

The majority of brake noise is caused by______

How much force would you get from 80 PSI applied to a 2 in. square piston?

List 5 properties of brake fluid.

P.S.I stands for?

When brakes get to hot and no longer stop the car this is referred to as;

What type of hydraulic brake system is usually found on F.W.D. cars?

Divide the weight into the number of pounds of pull to move an object is a description of the term.

The hydraulic system is used to transmit pressure, force and___

Stopping distance is determined by: Driver reaction time. Weight of the vehicle. and

The main difference between DOT 3 and DOT 4 brake fluid is?

List 3 methods used to bleed the hydraulic brake system?

Name 3 things that can turn on a red brake light.