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Introduction to Automotive Engineering > Vehicle Chassis: Braking System > Flashcards

Vehicle Chassis: Braking System Flashcards

1
Q

What is the primary purpose of a brake system?
A) To increase vehicle speed
B) To store energy for later use
C) To convert kinetic energy into heat energy
D) To convert heat energy into kinetic energy

A

C) To convert kinetic energy into heat energy

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2
Q

Which type of brake is easier to integrate with a parking brake?
A) Disk Brake
B) Drum Brake
C) ABS Brake
D) Hydraulic Brake

A

B) Drum Brake

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3
Q

Which of the following is a disadvantage of drum brakes?
A) High cost
B) Requires external power assistance
C) Poor heat dissipation
D) Inability to generate self-servo action

A

C) Poor heat dissipation

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4
Q

What is the main advantage of disk brakes over drum brakes?
A) Lower cost
B) Better heat dissipation
C) Easier parking brake integration
D) Greater self-servo action

A

B) Better heat dissipation

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5
Q

What does the hydraulic brake system use to transmit braking force?
A) Air pressure
B) Hydraulic fluid
C) Electrical signals
D) Friction

A

B) Hydraulic fluid

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6
Q

What is the purpose of the tandem master cylinder?
A) To increase hydraulic pressure
B) To allow the car to brake without engine power
C) To prevent complete failure of the braking system
D) To generate self-servo action

A

C) To prevent complete failure of the braking system

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7
Q

What happens during weight transfer when braking?
A) Weight shifts towards the rear wheels
B) Weight shifts towards the front wheels
C) Weight remains evenly distributed
D) Weight shifts towards the side of the vehicle

A

B) Weight shifts towards the front wheels

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8
Q

Why is rear wheel lockup dangerous?
A) It reduces heat dissipation
B) It prevents steering
C) It makes the vehicle unstable
D) It increases braking force

A

B) It prevents steering

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9
Q

How does ABS prevent wheel lockup?
A) By applying more brake force to the wheels
B) By increasing tire pressure
C) By releasing brake pressure when a wheel slows too quickly
D) By deactivating the hydraulic system

A

C) By releasing brake pressure when a wheel slows too quickly

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10
Q

Which type of brakes are usually used in the front of the vehicle for better energy dissipation?
A) Drum Brakes
B) Disk Brakes
C) Parking Brakes
D) Hydraulic Brakes

A

B) Disk Brakes

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11
Q

What component assists in increasing braking force without additional pedal pressure?
A) Parking brake
B) Brake booster
C) Caliper
D) Master cylinder

A

B) Brake booster

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12
Q

Which of the following is a benefit of using a load-apportioning valve in trucks?
A) Increases parking brake efficiency
B) Prevents front wheel lockup
C) Adjusts brake force based on vehicle load
D) Reduces hydraulic fluid consumption

A

C) Adjusts brake force based on vehicle load

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13
Q

What occurs when inertia force acts at the center of gravity (CG) during braking?
A) The vehicle accelerates forward
B) The vehicle becomes more stable
C) The vehicle tries to rotate counterclockwise (CCW)
D) The brakes overheat

A

C) The vehicle tries to rotate counterclockwise (CCW)

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14
Q

What is the disadvantage of increasing mechanical leverage in brakes without power assistance?
A) Brake fade is reduced
B) The pedal travel becomes too long
C) The braking force decreases
D) The brakes overheat rapidly

A

B) The pedal travel becomes too long

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15
Q

Why is front wheel lockup undesirable during braking?
A) It increases braking force
B) It causes the vehicle to oversteer
C) It prevents effective steering
D) It reduces rear braking force

A

C) It prevents effective steering

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16
Q

Which component directly applies pressure to the brake pads in a disk brake system?
A) Master Cylinder
B) Caliper
C) Brake Booster
D) Parking Brake

A

B) Caliper

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17
Q

What type of brake system is commonly used in the rear of a vehicle to integrate the parking brake?
A) Disk Brake
B) Drum Brake
C) Hydraulic Brake
D) ABS

A

B) Drum Brake

18
Q

What is the role of a brake booster?
A) To store hydraulic fluid
B) To increase braking force using vacuum pressure
C) To reduce friction between the brake pads
D) To prevent overheating of the brakes

A

B) To increase braking force using vacuum pressure

19
Q

Which braking issue is referred to as “fade”?
A) Loss of hydraulic fluid
B) Braking performance decreases with increasing temperature
C) Excessive brake pedal travel
D) Wheels locking during braking

A

B) Braking performance decreases with increasing temperature

20
Q

Why are disk brakes preferred for the front wheels in vehicles?
A) They are cheaper than drum brakes.
B) They provide better heat dissipation.
C) They require less maintenance.
D) They generate more braking force automatically.

A

B) They provide better heat dissipation.

21
Q

Which law of physics explains the inertia force acting on a vehicle during braking?
A) Newton’s First Law
B) Newton’s Second Law
C) Newton’s Third Law
D) Law of Conservation of Momentum

A

B) Newton’s Second Law

22
Q

What happens if the rear wheels lock up during braking?
A) The vehicle will continue to steer properly.
B) The vehicle may become unstable and lose control.
C) Braking distance will be reduced.
D) It will have no effect on the vehicle’s stability.

A

B) The vehicle may become unstable and lose control.

23
Q

Which component ensures the brake fluid stays within the hydraulic system?
A) Master Cylinder
B) Caliper
C) Brake Booster
D) Load-Apportioning Valve

A

A) Master Cylinder

24
Q

How does the self-servo action in drum brakes improve braking efficiency?
A) It reduces brake fade.
B) It increases friction force as the leading shoe engages the drum.
C) It cools the drum brake during operation.
D) It decreases hydraulic pressure requirements.

A

B) It increases friction force as the leading shoe engages the drum.

25
Q

Which of the following describes the function of a tandem master cylinder?
A) It boosts hydraulic pressure.
B) It connects the front and rear brakes in a single circuit.
C) It splits the brake system into two independent circuits.
D) It prevents wheels from locking during braking.

A

C) It splits the brake system into two independent circuits.

26
Q

Which condition requires the use of a load-apportioning valve in a braking system?
A) Sudden acceleration
B) Vehicle overload with cargo
C) Driving on a flat road
D) Traveling at low speeds

A

B) Vehicle overload with cargo

27
Q

How does a car behave when the front wheels lock up?
A) It maintains its steering path.
B) It loses steering control and continues straight.
C) It rotates more quickly around a corner.
D) It becomes more stable during turns.

A

B) It loses steering control and continues straight.

28
Q

What is the primary purpose of ABS (Anti-lock Braking System)?
A) To increase braking force
B) To prevent wheels from locking during braking
C) To apply braking force to all wheels evenly
D) To reduce brake fluid consumption

A

B) To prevent wheels from locking during braking

29
Q

What effect does inertia force have when a car decelerates?
A) It shifts the weight towards the rear wheels.
B) It causes the car to rotate counterclockwise.
C) It increases friction between the tires and the road.
D) It reduces the effectiveness of the rear brakes.

A

B) It causes the car to rotate counterclockwise.

30
Q

Which type of brake system is best suited for heavy trucks to ensure braking stability?
A) Front disk and rear drum brakes with a load-apportioning valve
B) Disk brakes on all four wheels
C) Drum brakes on all four wheels
D) Rear ABS with manual parking brakes

A

A) Front disk and rear drum brakes with a load-apportioning valve

31
Q

Which of the following are the two main types of brakes discussed in the lecture?
a) Drum brakes and Disc brakes
b) Hydraulic brakes and Pneumatic brakes
c) Regenerative brakes and Friction brakes
d) Electromagnetic brakes and Mechanical brakes

A

a) Drum brakes and Disc brakes

32
Q

What type of brake features a “self-servo action”?
a) Disc Brake
b) Drum Brake

A

b) Drum Brake

33
Q

A disk brake system utilizes what component to generate stopping force?
a) Wheel Cylinders
b) Calipers

A

b) Calipers

34
Q

What is the function of a tandem master cylinder in a hydraulic brake system?
a) To provide a single hydraulic circuit for all brakes
b) To boost braking force using vacuum pressure
c) To create two independent hydraulic circuits, preventing complete brake failure if one circuit fails
d) To distribute hydraulic pressure equally to all four wheels

A

c) To create two independent hydraulic circuits, preventing complete brake failure if one circuit fails

35
Q

What is the purpose of a brake booster?
a) To reduce the braking distance by increasing friction
b) To allow for larger leverage without increasing pedal travel
c) To provide additional power assistance to the braking system
d) To prevent the wheels from locking up during braking

A

c) To provide additional power assistance to the braking system

36
Q

Direct-acting brake servos are activated when the brake is applied. During this time, which of the following actions occur within the servo mechanism?
a) The vacuum port is opened, and the atmospheric port is closed.
b) The atmospheric port is opened, and the vacuum port is closed.
c) Both the vacuum and atmospheric ports are closed.
d) Both the vacuum and atmospheric ports are opened.

A

c) Both the vacuum and atmospheric ports are closed.

37
Q

During braking, where does the weight of the vehicle shift?
a) To the front wheels
b) To the rear wheels
c) Evenly across all wheels
d) It depends on the type of vehicle

A

a) To the front wheels

38
Q

How does weight transfer affect brake proportioning?
a) It has no effect on brake proportioning
b) It requires the rear brakes to generate more force
c) It requires the front brakes to generate more force
d) It requires equal brake force distribution between front and rear

A

b) It requires the rear brakes to generate more force

39
Q

What is the primary function of an Anti-lock Braking System (ABS)?
a) To shorten the stopping distance under all conditions
b) To prevent wheel lockup during braking
c) To increase steering control during hard acceleration
d) To distribute braking force evenly to all four wheels

A

b) To prevent wheel lockup during braking

40
Q

Why is wheel lockup undesirable during braking?
a) It increases stopping distance.
b) It causes the vehicle to skid uncontrollably.
c) It reduces the driver’s ability to steer.
d) All of the above

A

c) It reduces the driver’s ability to steer.

Introduction to Automotive Engineering (5 decks)

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