Brainscape's Knowledge GenomeTM

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


See full index

CDL > Driving safely > Flashcards

Driving safely Flashcards

1
Q

how much steering wheel play can make it hard steer

A

more then 10 degrees or about 2 inches at the rim of a 20inch steering wheel

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

Name suspension defects

A

1.Cracked or broken spring hangers
2. Missing or broken leaves in any leaf spring if ¼ or more is missing vehicle will be placed “out of service”

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

What are three kinds of emergency equipment must you have

A

3 triangles
spare fuses
fire extinguisher

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

What is the minimum tread depth for FRONT TIRES

A

4/32

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

what is the minimum tread depth for all OTHER TIRES

A

2/32

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

How many red reflective triangles should you carry

A

3

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

what are the 4 types of retarder

A
  1. exhaust
  2. engine
  3. hydraulic
    4.electric
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

TRUE or FALSE retarders keep you from skidding when the road is slippery

A

False wheels may slip when roads are wet

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what should you do to the retarders if the roads are slippery and your drive wheels have poor traction

A

Turn the retarders off because the retarder may cause them to skid

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

why should you back towards the drivers side

A

so you can see better because it is harder to see from the right side

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what are 2 special conditions where you should downshift

A

1.Before starting down a hill
2. before entering a curve

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

what is the perception time for an alert driver

A

1 3/4 seconds
at 55 mph= 142 feet traveled

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

what is the average reaction time for an alert driver

A

3/4 to 1 second
at 55mph=61 feet

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

TRUE or FALSE do bridges freeze before the road freezes

A

True

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

what speed does hydroplaning occur

A

can occur at speeds as low as 30 mph

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

how much alcohol can be in the body to have a suspended license

A

0.02

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what BAC is it illegal’s to operate a vehicle

A

0.04

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

how long will you lose you CDL for a first offense in driving under the influence of any substance

A

1 year

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

how long will you loose you CDL that is placarded for hazardous material for anything under the influence

A

at least 3 years

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

how long will you loose your CDL for a second offense under a placarded vehicle

A

for life

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

how long will you loose your CDL for committing a felony involving substances

A

for life

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

how long willy you be placed out of service if you have any detectable about of alcohol under 0.04

A

24 hours

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

how long will you loose your CDL for a first offence in railroad violations

A

60 days

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

how long will you loose you CDL for a second offense within a three year period for a railroad violation

A

120 days

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

how long will you lose your cdl for a third violation within a three year period for a railroad violation

A

at least 1 year

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

what are the two air lines in a trailer

A

service line and emergency line

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

how far ahead should you be looking while driving

A

15-20 seconds ahead

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

what are the 5 different types of lights

A
  1. reflectors
  2. marker lights
  3. clearance lights
  4. tail lights
    5.identification lights
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

how should you properly break

A
  1. place vehicle in in proper low gear
  2. apply brakes hard enough to feel a definite slow down
  3. when your speed has been reduced to 5mph you are considered in safe speed and release the breaks then repeat the steps
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

truck tractors built on or after what date are required to have ABS systems

A

March 1, 1997

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

why should you make a move as soon as you know that your breaks are failing

A

the longer you wait the faster the vehicle will go and the harder it becomes to stop

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

what are the 3 accident procedures

A

1.protect the area
2.notify the authorities
3.care for the injured

33
Q

how many identifying placards should there be on a vehicle

A

at least 4

34
Q

where should the placards be placed

A

in the front, rear, and both sides

35
Q

how big must placards be

A

9.8 inches (250mm)

36
Q

how should the placards be presented

A

turned upright to a point in the shape of a diamond

37
Q

what is included in the Gross vehicle weight rating (GVWR)

A

1.net weight of vehicle with accessories
2. weight of passengers
3. weight of fuel
4. weight of cargo

38
Q

what will too much weight on the steering axle cause

A

hard steering and damage too the steering axel and tires

39
Q

what will happen if you have under loaded front axels

A

can make the steering axle to light and cause poor traction

40
Q

what will happen if your load has a high center gravity

A

can cause greater chances in a rollover

41
Q

what is the purpose of the front end structure

A

should block any forward movement of cargo

42
Q

where is the safety relief valve located

A

in the first tank the air compressor pumps air into

43
Q

what is the job of the safety valve

A

protects the tanks and the rest of the system from too much pressure

44
Q

how much pressure does the safety valve need to open

A

150psi

45
Q

how does the s-cam brake work

A

it forces the brake shoes away from one another and presses them against the inside of the brake drum

46
Q

what happens when you release the brake pedal in an s-cam

A

the s-cam rotates back and the spring pulls the brake shoes away from the drum allowing the wheels to roll

47
Q

how do disc brakes work

A

the pressure of the brake chamber on the slack adjuster turns the power screw and the power screw clamps the disc or the rotor between the lining pads of a caliper

48
Q

unlike s-cam brakes what is used in a disc brake that is NOT in a s-cam brake

A

power screw

49
Q

what does your application pressure gauge show you

A

how much air pressure is being applied to the brakes

50
Q

what does it mean if you are increasing the application pressure to hold the same speed

A

brakes are fading

51
Q

what does the need for increased pressure while braking indicate

A
  1. brakes out of adjustment
  2. air leaks
  3. mechanical problems
52
Q

how does a stop light switch work

A

the air break system activates an electric switch using air pressure to switch the brake lights on

53
Q

what happens when the air pressure is removed from spring breaks

A

springs will put on the brakes

54
Q

what allows a driver to let air out of the spring brakes

A

parking brake lever

55
Q

what will also allow spring brakes to deploy

A

a leak in the air break system

56
Q

what does ABS help with

A
  1. avoiding wheel lock up
  2. reduces braking pressure
  3. maintain control
57
Q

ABS may not help you stop faster but you should be able too…..

A
  1. steer around obstacles while braking
  2. avoid skids caused by over braking
58
Q

how do you stab brake

A

apply brakes all the way until wheels lock up then release once wheels are rolling again apply brakes fully again

59
Q

how long can it take for your wheels to start rolling after the breaks have been fully applied

A

about 1 second

60
Q

what happens if the brakes are applied before the wheels start rolling

A

vehicle will not straighten out

61
Q

what does the parking lever control look like on newer vehicles

A

yellow and diamond shaped labeled parking brake

62
Q

what might the parking brake look like in older vehicles

A

a round blue knob or some other shape or could include a lever the swings from side to side or up and down

63
Q

what happens when the wheels of a trailer lock up

A

your trailer might swing around also known as a trailer jackkife

64
Q

when is your trailer more likely to swing around and create a trailer jackknife

A

when the trailer is empty or lightly loaded

65
Q

at what pressure will the tractor pressure valve pop out

A

in the range of 20-45 PSI

66
Q

converter dollies and trailers built before what year are not required to have spring brakes

A

before 1975

67
Q

All trailers and converter dollies built on or after what year are required to have ABS

A

March 1, 1998

68
Q

dollies manufactured on or after what date are required to have a lamp on the left side

A

March 1, 1998

69
Q

as you brake with ABS what should you do

A

slow down and monitor tractor and trailer and if safe back off brakes to stay in control

70
Q

how should you check that your parking break is working properly

A

With air pressure built to governor cutout and the parking brake engaged check that the parking brake will hold the vehicle by gently trying to pull forward with parking brake on

71
Q

how should you check that your hydraulic brakes check

A

Pump the brake pedal three times then hold it down for 5 seconds.

72
Q

what should the brake pedal not do after pumping the brakes and during holding it down for the 5 seconds to check your hydraulic breaks

A

the break pedal should not move (depress) during the 5 seconds

73
Q

how do you preform a service brake check

A

pull forward at 5mph and apply the service break and stop
make sure that the vehicle does not pull side to side and comes to a top when the brake is applied

74
Q

how should you inspect the locking jaws

A

look into the 5th wheel gap and check that the locking jaws are fully closed around the king pin

75
Q

how should you inspect your 5th wheel skid plate

A

Check for proper lubrication and securely mounted to the platform and that all the bolt and pins are secure and none are missing

76
Q

what do you need in a school bus for emergency equipment

A
  1. spare electrical fuses
    2.three reflective red triangles
  2. 6 fuses OR 3 liquid burning flares
  3. fire extinguisher
  4. emergency kit
  5. body fluid cleanup kit
77
Q

how should you inspect landing gear in a school bus

A

Check that gear is fully raised and has no missing parts, the handle is secure, and the support frames and landing pads are not damaged

78
Q

if the landing gear in the school bus is air operated what should you check for

A

hydraulic leaks

CDL (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions