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Brake Design > Chapter 2 > Flashcards

Chapter 2 Flashcards

1
Q

______ is the ability to do work

A

Energy

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2
Q
  1. The brake system is used to overcome the _______________ of motion and helps stop the vehicle.
A

INERTIA

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3
Q

Mass is not the weight of the object but the amount of _______________ in that object.

A

MATTER

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4
Q

For every _______________, there is an opposite and equal _______________.

A

ACTION, REACTION

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5
Q

If the _______________ piston is larger than the _______________ piston, it exerts more force but travels a shorter distance.

A

OUTPUT, INPUT

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6
Q
  1. _______________ is the mathematical product of an object’s mass times its speed.
A

MOMENTUM

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7
Q

The rate of current flowing in a conductor is measured in _______________.

A

AMPS

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8
Q
  1. The pressure pushing the electrons through an electrical circuit is called _______________.
A

VOLTAGE

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9
Q
  1. Electrical resistance is measured in _______________.
A

OHMS

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10
Q
  1. The _______________ ____________________ ______________ becomes involved only if it senses one (or more) wheels about to lock up.
    Multiple Choice
A

ANTI-LOCK BREAKING SYSTEM

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11
Q

Technician A says kinetic energy is the energy of mechanical work or motion. Technician B says when an automobile starts, accelerates, deceler- ates, and stops, kinetic energy is at work. Who is correct?
A. A only B. B only
C. Both A and B D. Neither A nor B

A

C. BOTH A AND B

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12
Q

Technician A says weight is a measurement of the number of molecules that make up an object. Technician B says mass is a measurement of the effect of gravity on that mass. Who is correct?
A. A only B. B only
C. Both A and B D. Neither A nor B

A

D. NEITHER A NOR B

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13
Q

Technician A says the weight of a car is not dis- tributed evenly on all four wheels even when the vehicle is standing still. Technician B says the position of the heavy engine and powertrain com- ponents determines weight distribution. Who is correct?
A. A only C. Both A and B
B. B only D. Neither A nor B

A

C. BOTH

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14
Q

Technician A says on a rear-wheel-drive car, about 70 percent of the weight shifts to the front. Technician B says on a front-wheel-drive car, as much as 60 percent of the car weight is shifted to the front during braking. Who is correct?
A. A only B. B only
C. Both A and B D. Neither A nor B

A

A. A ONLY

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15
Q

Technician A says a car can accelerate from 0 to 60 mph in 10 seconds. Technician B says the brake system must be able to decelerate the car from 60 to 0 mph in nearly one-fifth that time. Who is correct?
A. A only B. B only
C. Both A and B D. Neither A nor B

A

C. BOTH

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16
Q

Technician A says this chapter focuses on the friction between the brake linings and the brake rotor or drum. Technician B says to remember that the vehicle is actually stopped by the fric- tion between the tire and the road. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B

A

C. BOTH

17
Q

Technician A says a car with locked brakes has a shorter stopping distance. Technician B says this is because hot molten rubber can form between the tire and the road, causing a grabbing effect.
A. A only C. BOTH
B. B only. D. NEITHER

A

D. NEITHER

18
Q

Two basic types of friction are brake system. These are:
A. STATIC AND DYNAMIC
B. DISC AND DRUM
C. MOVING AND STOPPING
D. KINETIC AND STATIC

A

D. KINETIC AND STATIC

19
Q

Technician A says it takes more force to move some materials over a surface than others, even though the applied pressure and the amount of surface in contact are the same. Technician B says different materials have the same frictional char- acteristics or coefficients of friction.
A. A only C. Both A and B
B. B only D. Neither A nor B

A

A. A ONLY

20
Q

Technician A says if pads and linings are soft and wear fast, the vehicle may have very good braking ability, but friction material life will be short. Technician B says if friction material is hard and wears slowly for long life, it will create a high coefficient of friction and good stopping ability.
A. A only B. B only
C. Both A and B D. Neither A nor B

A

A. A ONLY

21
Q
  1. Briefly explain how a braking system converts one form of physical energy to another.
A

Mechanical energy to thermal energy through the application of friction from the brake pads

22
Q
  1. Explain the brake system dynamic called weight transfer.
A

The front of the car is lowered during a hard stop caused by the vehicle weight being transferred from the rear to the front. More braking must be done by the front wheels

23
Q
  1. Explain the difference between static and dynamic inertia.
A

Static is force require to overcome no movement. Dynamic is inertia of object in motion

24
Q
  1. Explain the relationship between pressure and friction.
A

Directly proportional, higher the pressure the higher the friction

25
Q
  1. Explain what the term coefficient of friction means
A

Numerical value that expresses amount of two objects, tensile force (motion) divided by weight force

26
Q
  1. Explain why heat dissipation is important in a braking system and how it is removed.
A

Heat is a result of friction, heat is moved from the friction surface as it passes through the friction material and metal of the brake components into the air

27
Q
  1. Briefly describe inertia.
A

Inertia is the resistance to a change in motion`

28
Q
  1. Explain what happens if air is introduced into a hydraulic system.
A

When pressure is applied the air in the system will compress instead of transmitting movement and force effectively

29
Q
  1. Explain how the force from a small master cylinder piston is multiplied by the caliper piston.
A

Pressure is inversely related to piston area, the smaller the piston the greater the pressure developed. That same pressure applied over a large area creates a mechanical advantage with more output force than input purce

30
Q
  1. Briefly describe amperage, resistance, and voltage
A
  • Voltage is pressure that moves electrons (current) through a wire that offers resistance to flow based on material properties

Brake Design (4 decks)

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