Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Kansas CDL Manual (Version: June 2022) > Section 5 - Air Brakes > Flashcards

Section 5 - Air Brakes Flashcards

1
Q

What do air brakes use to make the brakes work?

A

Compressed air.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

List the three different braking systems of air brakes.

A
  1. Service brake
  2. Parking brake
  3. Emergency brake
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What brake system applies and releases the brakes when you use the brake pedal during normal driving?

A

The service brake system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What brake system applies and releases the parking brakes when you use the its control?

A

The parking brake system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What brake system uses parts of the service and parking brake systems to stop the vehicle in a brake system failure?

A

The emergency brake system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What does the air compressor pump air into?

A

Air storage tanks aka reservoirs
(5.1.1 - Air Compressor)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What connects the air compressor to the engine?

A

Gears or a v-belt
(5.1.1 - Air Compressor)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are two ways the air compressor can be cooled?

A
  1. Air Cooled
  2. Engine Cooling System
    (5.1.1 - Air Compressor)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What should you check before driving if the air compressor has its own oil supply?

A

The oil level
(5.1.1 - Air Compressor)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are two ways the air compressor can be lubricated?

A
  1. It may have its own oil supply
  2. It may be lubricated by the engine oil
    (5.1.1 - Air Compressor)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What controls when the air compressor will pump air into the air storage tanks?

A

The governor
(5.1.2 - Air Compressor Governor)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the “cut-out” pressure for the air tank?

A

Around 125 psi
(5.1.2 - Air Compressor Governor)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the “cut-in” pressure for the air tank?

A

Around 100 psi
(5.1.2 - Air Compressor Governor)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What do air storage tanks hold?

A

Compressed air
(5.1.3 - Air Compressor Tanks)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

True or False:
Do air storage tanks hold enough air to allow the brakes to be used several times, even if the compressor stops working?

A

True
(5.1.3 - Air Compressor Tanks)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are two things in compressed air that is bad for the air brake system?

A
  1. Water
  2. Compressed oil
    (5.1.4 - Air Tank Drains)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

How can the water in compressed air cause brake failure?

A

By freezing
(5.1.4 - Air Tank Drains)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What are the two type of air tank drain valves?

A
  1. Manual
  2. Automatic
    (5.1.4 - Air Tank Drains)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Which type of air tank drain valve automatically expels the water and oil?

A

Automatic
(5.1.4 - Air Tank Drains)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

How often must manual air tank drain valves be drained?

A

Daily. At the end of each day of driving.
(5.1.4 - Air Tank Drains)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What helps reduce the risk of ice in air brake valves and other parts during cold weather?

A

Alcohol evaporator that puts alcohol into the air system
(5.1.5 - Alcohol Evaporator)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What can happen if ice gets into the air brake system?

A

The brakes can stop working
(5.1.5 - Alcohol Evaporator)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

During cold weather, how often should the alcohol container be filled?

A

Every day
(5.1.5 - Alcohol Evaporator)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Where is a safety relieve valve installed?

A

In the first tank that air compressor pumps air into.
(5.1.6 - Safety Valve)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

At what psi level is the safety relief valve set to open?

A

150 psi
(5.1.6 - Safety Valve)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Is it good or bad if the safety valve releases air?

A

Bad. That means that something is wrong.
(5.1.6 - Safety Valve)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Foot valve and treadle valve are also known as what?

A

The brakes
(5.1.7 - The Brake Pedal)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

What happens when you press and release the pedal unnecessarily?

A

Air will be let our faster than the compressor can replace it.
(5.1.7 - The Brake Pedal)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

What happens if the pressure in the air compressor gets too low?

A

The brakes won’t work.
(5.1.7 - The Brake Pedal)

30
Q

Where are foundation brakes used?

A

On each wheel.
(5.1.8 - Foundation Brakes)

31
Q

What is the most common type of foundation brakes?

A

The s-cam drum brake
(5.1.8 - Foundation Brakes)

32
Q

Where a brake drums located?

A

At each end of the vehicle’s axles.
(5.1.8 - Foundation Brakes)

33
Q

Where is the braking mechanism on a drum brake?

A

Inside
(5.1.8 - Foundation Brakes)

34
Q

True or False:
To stop, the drum brake’s shoes and linings are pushed against the inside of the drum.

A

True
(5.1.8 - Foundation Brakes)

35
Q

How much heat can a drum brake take without damage?

A

It depends on how hard and long the brakes are used. Too much heat can make the brakes stop working.
(5.1.8 - Foundation Brakes)

36
Q

List three types of brakes.

A
  1. S-cam Brakes
  2. Wedge Brakes
  3. Disc Breaks
    (5.1.8 - Foundation Brakes)
37
Q

Which type of brake is the most common?

A

S-cam brakes
(5.1.8 - Foundation Brakes)

38
Q

What do all vehicles with air brakes have connected to the air tank?

A

A pressure gauge
(5.1.9 - Supply Pressure Gauges)

39
Q

What do supply pressure gauges tell you?
NOTE: May be on the test.

A

How much pressure is in the air tanks
(5.1.9 - Supply Pressure Gauges)

40
Q

What gauge shows how much air pressure you are applying to the brakes?

A

The application pressure gauge
(5.1.10 - Application Pressure Gauge)

41
Q

What does it mean if you have to increase application pressure to hold the same speed?

A

That the brakes are fading
(5.1.10 - Application Pressure Gauge)

42
Q

List three things may cause you to increase pressure when braking?

A
  1. Brakes are out of adjustment
  2. Air leaks
  3. Mechanical problems
    (5.1.10 - Application Pressure Gauge)
43
Q

What should you do if you’re having to increase application pressure to maintain your current speed?

A

Slow down and use a lower gear
(5.1.10 - Application Pressure Gauge)

44
Q

What is required on all vehicles with air brakes?
NOTE: May be on the test.

A

A low air pressure waring signal
(5.1.11 - Low Air Pressure Warning)

45
Q

A low air pressure warning signal will come on before the air pressure in the tanks falls below what psi level?

A

55 psi
(5.1.11 - Low Air Pressure Warning)

46
Q

What turns on the brake lights when you put on the air brakes?

A

An electrical stop light switch that works by air pressure
(5.1.12 - Stop Light Switch)

47
Q

What conditions are bad for front wheel braking?
NOTE: May be on the test.

A

Front wheel braking is good under all conditions
(5.1.13 - Front Brake Limiting Valve)

48
Q

How are spring breaks affected when air pressure is removed?

A

Spring breaks will put on the brakes if the air pressure is removed.
(5.1.14 - Spring Breaks)

49
Q

What is in the cab that allows the driver to let the air out of the spring breaks?

A

A parking break control
(5.1.14 - Spring Breaks)

50
Q

Will a leak in the air break system cause the springs to put on the brakes?

A

Yes
(5.1.14 - Spring Breaks)

51
Q

What should you do if the low air pressure warning light and buzzer first come on?

A

Bring the vehicle to a safe stop right away, while you can still control the breaks.
(5.1.14 - Spring Breaks)

52
Q

What will cause the regular breaks, the emergency/parking breaks to work improperly?

A

If the breaks are not adjusted properly
(5.1.14 - Spring Breaks)

53
Q

True or False:
Use the parking brakes whenever you park.

A

True
(5.1.15 - Parking Break Controls)

54
Q

Why should you never push the brake pedal down when the spring brakes are on?

A

The brakes could be damaged by the combined forces of the springs and the air pressure.
(5.1.15 - Parking Break Controls)

55
Q

What are parking breaks also known as?

A

Spring breaks
(5.1.15 - Parking Break Controls)

56
Q

In some vehicles a control handle on the dash board may be used to apply the spring brakes gradually. What is this called?

A

A modulating valve
(5.1.15 - Parking Break Controls)

57
Q

Why do some vehicles, such as buses, have a separate air tank that can be used to release the spring breaks?

A

So you can move the vehicle in an emergency
(5.1.15 - Parking Break Controls)

58
Q

What valves can be used to move your vehicle if main air pressure is lost and the spring breaks come on?

A

Dual parking control valves
(5.1.15 - Parking Break Controls)

59
Q

Does the tractor protection valve open or close if air supply drops when driving?

A

It closes automatically
(5.1.15 - Parking Break Controls)

60
Q

What does the tractor protection valve provide?

A

Air supply
(5.1.15 - Parking Break Controls)

61
Q

What happens to the tractor protection valve when the parking brake is applied?

A

The parking brakes, when applied, close the tractor protection valve and set the spring brakes at the same time.
(5.1.15 - Parking Break Controls)

62
Q

Name the computerized system that keeps your wheels from locking up during hard brake applications.

A

Antilock Braking Systems
(5.1.16 - Antilock Braking Systems)

63
Q

What does ABS stand for?

A

Antilock Braking Systems
(5.1.16 - Antilock Braking Systems)

64
Q

What indicates an ABS malfunction?

A

Vehicles with ABS have yellow malfunction lamps to tell you if something is working
(5.1.16 - Antilock Braking Systems)

65
Q

What has happened if the ABS lamp stays on after the bulb check, or goes on once you are underway?

A

You may have lost ABS control at one or more wheels.
(5.1.16 - Antilock Braking Systems)

66
Q

When does the ABS activate?

A

When wheels are about to lock up.
(5.1.16 - Antilock Braking Systems)

67
Q

True or False:
ABS helps you keep the vehicle under control during hard braking.

A

True
(5.1.16 - Antilock Braking Systems)

68
Q

How do you know if your vehicle is equipped with antilock brakes?
NOTE: May be on the test.

A

Truck tractors with air brakes built on or after march 1, 1997, and other air brake vehicles (trucks, buses, trailers, and converter dollies) built on or after march 1, 1998 are required to be equipped with antilock brakes.
(5.1.16 - Antilock Braking Systems)

69
Q

True or False:
You can check the certification label for the manufacture date to determine if your vehicle is equipped with antilock brakes.

A

True
(5.1.16 - Antilock Braking Systems)

70
Q

Why must air tanks be drained?
NOTE: May be on the test.

A

Compressed air usually has some water and some compressor oil in it. The water can freeze in cold weather and cause brake failure.
(5.1.4 - Air Tank Drains)

71
Q

What are spring breaks?
NOTE: May be on the test.

A

Powerful springs that are held back by air pressure. If the air pressure is removed, the springs put on the brakes.
(5.1.14 - Spring Breaks)

72
Q
A

Kansas CDL Manual (Version: June 2022) (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions