Missouri CDL Flashcards
1
Q
What is the most important reason for doing a safety inspection?
A
Safety
2
Q
What things should you check during a trip?
A
gauges for signs of trouble
Look, Listen, Smell, Feel
3
Q
Name key steering system parts?
A
Steering Wheel Steering Shaft Gear Box Steering fluid reservoir Pitman Arm Drag Link Steering knuckle Power steering cylinder Tie rod
4
Q
Name some suspension system defects.
A
Cracked or broken spring hangers
Missing or broken leaves in any leaf spring
Leaking shock absorbers
Torque rod or arm, u-bolts, spring hangers damaged or broken.
5
Q
What three kinds of emergency equipment must you have?
A
Fire extinguisher
Spare electrical fuses
Warning devices for parked vehicles. Three reflective triangles or three road flares.
6
Q
Anytime you stop, what should you check?
A
Tires, wheels, and rims
Lights and reflectors
7
Q
Steering system defects
A
Missing nuts, bolts, cotter keys, or other parts
Bent, loose or broken such as steering column, tie rods.
Steering wheel play of more than 10 degrees or 2 inches of movement.
8
Q
Exhaust system defects.
A
Loose, broken, or missing exhaust pipe, mufflers, or vertical stacks.
Loose, broken, or missing mounting brackets, clamps, bolts, or nuts.
Exhaust system parts that may be leaking.
9
Q
What is the minimum tread depth for front tires?
A
4/32” tread depth in every major groove on front tires
10
Q
What is the minimum tread depth for rear tires or trailer tires?
A
2/32” with no fabric showing through tread or sidewall
11
Q
Name some things you should check for on the front of the vehicle during the walk around inspection?
A
Condition of front axel
Condition of steering system. Must grab steering mech to test for looseness.
Windshield and wipers
Lights and reflectors
12
Q
What should wheel bearing seals be checked for?
A
Seals are not leaking
13
Q
How many reflective triangles should you carry?
A
Three minimum
14
Q
How do you check for hydraulic leaks?
A
Pump brake peddle three times and then hold for a minimum of five seconds. The peddle should not move.
15
Q
Examples of tire damage
A
Cuts or other damage
tread separation
dual tires that com in contact with each other or parts of the vehicle
Mismatched sizes
radial and bias-ply tries used together
cut or cracked valve stem
16
Q
Why should you back up toward the drivers side?
A
You can see better and use the side window if necessary
17
Q
If stopped on a hill, how can you start without rolling back?
A
By using the parking brake
18
Q
When backing up, why is it important to use a helper?
A
There are blind spots that you can not see
19
Q
What is the most important hand signal that you and a helper can agree on?
A
“STOP”
20
Q
What are two important condition that you should downshift?
A
Before going down hill and before entering a curve
21
Q
When should you downshift an automatic transmission?
A
On downhill grades
22
Q
Retarders keep you from skidding when the road is slippery? True or False
A
False
23
Q
What are two ways to know when to shift gears?
A
Use engine speed (RPM) or use road speed (mph)
24
Q
How far ahead should you look?
A
12 to 15 seconds ahead. One block city driving or 1/4 mile at highway speed.
25
What are two important things to look for ahead?
Looking for other vehicles entering the highway or changing lanes and look for brake lights of other vehicles.
26
What is the most important way to see the sides and rear of your vehicle?
Checking your mirrors regularly
27
What does "communicating" mean in safe driving?
Communicating to other drivers what you intend to do
28
Where should you place reflectors if stopped on a divided highway?
10' 100' 200'
29
What three things add up to stopping distance?
Perception distance; reaction distance; braking distance
30
If you are going twice as fast, will your stopping distance increase by two or four times?
Four times greater
31
Empty trucks have the best braking? True or False
False. Heavy trucks have better traction
32
What is hydroplaning?
Tire rides on the surface of the water breaking contact with the pavement.
33
What is black ice?
a thin clear layer of ice that you can see the road through it.
34
How to signal drivers behind you as to trouble ahead.
Flash your brake lights several times
35
How to alert drivers that you intend to drive slowly.
Turn on your emergency flashers
36
If you stop on the shoulder or the road, you must put out your emergency warning device, within what time frame?
10 minutes
37
Where to put emergency reflectors on an undivided highway or a two lane road.
100' ahead of the vehicle
| 10' and 100' behind the vehicle
38
What is your total stopping distance?
perception distance + reaction distance + braking distance = total stoping distance
39
How do you determine how many seconds of following distance space you have?
One second for every 10' of vehicle length under 40 mph. Add another second for speeds above 40 mph.
40
If you are driving a 30 foot vehicle at 55 mph, how many seconds of following distance should you allow?
4 seconds
41
You should decrease your following distance if somebody is following you too closely. True or False?
False. You should increase your following distance if someone is tailgating. This will allow for slower changes to speed if traffic is slowing.
42
If you swing wide to the left before turning right, another driver may try to pass you on the right. True or False
True
43
What is a hazard?
Any road condition or any other road user.
44
Why make emergency plans when you see a hazard?
increases your reaction time.
45
What is the most important space surrounding the vehicle?
The space ahead
46
What are some tips to follow so you don't become a distracted driver?
Turn off cell phones. Clear vehicle of all unsecured items. No texting. Review maps or GPS before starting out. No smoking or eating while operating.
47
How do you use in-vehicle communications equipment cautiously?
?
48
How do you recognize a distracted driver?
Drifting. Inconsistent speeds. Preoccupied with maps, food, or smoking.
49
What is the difference between aggressive driving and road rage?
Aggressive driving is being selfish, bold or push. Road rage is using a vehicle with the intent of doing harm.
50
What should you do if you encounter an aggressive driver?
Get out of their way. Do not challenge them. Avoid eye contact. Ignore gestures.
51
What are some things you can do to reduce your stress before and while you drive?
Be realistic about travel time. Give driving your full attention. Slow down.
52
You should use low beams whenever you can?
False. Use your high beams whenever you can.
53
What should you do before you drive if you are drowsy?
Stop at the nearest safe place
54
What effects can wet brakes cause? How can you avoid these problems?
Can cause brakes to be weak. To apply unevenly or to grab. Can cause wheel lock ups and pulling to one side.. Avoid by no driving through standing water. If you do go through with light brake pressure. This presses linings against the drums keeping out water and mud.
55
You should let air out of hot tires so the pressure goes back to normal. True or False?
False. Tire pressure would be low once the tire cools off.
56
You can safely remove the radiator cap as long as the engine isn't overheated. True or False?
False. Wait for the engine to cool before removing the cap.
57
What factors determine your selection of a safe speed when going down a long, steep downgrade?
```
Total weight of the vehicle and cargo
length of the grade
Steepness of the grade
Road conditions
Weather
```
58
Why should you be in the proper gear before starting down a hill?
Because if you come out of that gear you may not be able to get into any other gear.
59
Describe the proper braking technique when going down a long, steep downgrade.
Apply brakes just hard enough to feel a definite slowdown. Slowdown to about 5 mph below your safe speed and repeat.
60
What type of vehicles can get stuck on a railroad-highway crossing.
Low slung units. Low-boys, car carrier, moving van, possum-belly, Live stock trailer.
61
How long does it take for a typical tractor-trailer unit to clear a double track?
15 seconds
62
What type of CMV is required to stop at railroad crossings?
Passenger vehicles and HAZMAT.
63
Stopping is not always the safest thing to do in an emergency.
True. Turning can be more timely and effective
64
What are the advantages of going right around an obstacle instead of left?
You wont force someone else into on coming traffic. Shoulder maybe available.
65
What is an "escape ramp"?
Mostly in mountainous terrain. Uses soft gravel to stop and hold the vehicle.
66
If a tire blows out, you should put the brakes on hard to stop quickly? True or False?
False. Stay off the brakes until you have slowed down and need to stop. Then use brakes gently.
67
What is the proper braking technique when driving a vehicle with antilock brakes?
Brake as you always have. Same technique as not having ABS.
68
How do antilock brakes help you?
ABS helps maintain control while skidding.
69
What are some things to do at an accident scene to prevent another accident?
Protect the area
Notify Authorities
Care for the injured
70
Name two causes of tire fires?
Under inflated tires
| Tires that are not properly spaced and are rubbing one another.
71
What kinds of fires is a B:C extinguisher good for?
Electrical fires and burning liquids
72
When using your extinguisher, should you get as close a possible to the fire?
No. Stay as far away as possible and aim at the source and not the fire.
73
Name some causes of vehicle fires.
After accidents; tires; electrical; fuel; cargo
74
Common medicines for colds can make you sleepy. True or False?
True.
75
Coffee and a little fresh air will help a drinker sober up. True or False?
False... Only time will sober you up as the body will only process 1/3 of an ounce per hour.
76
What is a hazardous materials placard?
Placard that communicates the risk of hazardous material
77
Why are placards used?
To communicate the risk
78
What four thing related to cargo are drivers responsible for?
Inspecting your cargo
Recognizing overloads and poorly balanced weight
Knowing your cargo is properly secured
Knowing your cargo does not restrict your access to
emergency equipment
79
How often must you stop while on the road to check your cargo?
within the first 50 miles and then re-inspect after 3 hours or 150 miles. Re-inspect every break you take while driving.
80
What can happen if you don't have enough weight on the front axle?
You will have poor traction.
81
What is the minimum number of tie-downs for any flatbed load?
two
82
What is the minimum number of tie-downs for a 20 foot load?
two
83
Name two basic reasons for covering cargo on an open bed.
To protect people from spilled cargo
| To protect the cargo from weather.
84
What must you check before transporting a sealed load?
You should check that you don't exceed gross weight and axle weight limits.
85
Why must air tanks be drained?
In the winter water can freeze causing brake failure. Also water tends to accumulate at the bottom of the tank and could cause internal rusting.
86
What is a supply pressure gauge used for?
to tell you how much pressure is in the tank.
87
All vehicles with air brakes must have a low air pressure warning signal. True or False?
True
88
What are spring brakes?
Emergency brake and parking brakes use heavy spring to hold the brakes. Air pressure is used to hold back the springs so if the air is to fail the spring brakes kick in.
89
Front wheel brakes are good under all conditions. True or False?
False
90
How do you know if your vehicle is equipped with antilock brakes?
a self test of the yellow ABS malfunction lamp on the forward pannel
91
What is a dual air brake system?
Two separate brake systems with a single brake control
92
What are the slack adjusters?
Adjust brake liners as they are used to maintain the proper gap.
93
How can you check the slack adjusters?
Release the parking brake and pull on the slack adjuster. If you can pull it more than 1" it needs to be adjusted.
94
How can you test the low pressure signal?
Turn off the vehicle. Move the key to just the electrical position. Pump down the air pressure. The warning signal should come on before 60psi.
95
How can you check that the spring brakes come on automatically?
Continue to pump brakes fanning down the pressure in the tank. Spring brakes should automatically engage around 20-40psi.
96
What are the maximum leakage rates?
With a fully charged air system, around 125psi., turn off the engine and release the parking brake. and time the air pressure drop. The loss should be less than 2psi in 1 minute for a single vehicle. 3psi in 1 minute for a combination vehicle.
97
Why should you be in the proper gear before starting down a hill?
To use engine braking to control speed using brakes to supplement
98
What factors can cause brakes to fade or fail?
Excessive use of the service brakes. This can cause excessive heat.
99
The use of brakes on a long, steep downgrade is only a supplement to the braking effect of the engine. True or False?
True
100
How often should you drain air tanks?
At the end of each working day
101
How should you brake when you drive a tractor-trailer combination with ABS?
Brake as you alway have. Use only the braking force necessary to stop safely and stay in control.
102
You still have normal brake functions if your ABS is not working. True or False?
True
103
Heights posted at bridges
Can be incorrect
104
Mirrors should be:
Checked requently
105
Tar in the road pavement often rises to the top in very hon weather. Spots where the tar bleeds are:
Very slippery
106
If you are disqualified from having a license, you:
Will not be able to get a CDL
107
For the first railroad crossing violation, the driver will be disqualified for:
At least 60 days
108
When traction is poor, as in the rain, why should a driver accelerate slowly?
So the vehicle does not lose control
109
When driving, you should have a plan to:
get out of a dangerous situation
110
If approaching a railroad track and a train is approaching you should
Stop and wait for the train to pass
111
Drowsy driving is most common during:
At night
112
Traction is important to:
Braking
113
On newer vehicles how do you put on the parking brake?
Pull the diamond-shaped yellow knob
114
If your license to operate a personal vehicle is revoked or suspended:
You cannot get a hardship license to operate a CDL
115
With a leaf spring
Leaves should not be broken
116
When approaching a vehicle for a pre-trip inspection, a driver should look under the vehicle:
To see if there are any fresh fluids under the vehicle
117
Combination vehicles usually
Require more skill to drive than single commercial vehicles
118
If the safety relief valve in the air brake system releases air:
There is something wrong with the brakes
119
Engaging in complex conversations with others would be considered:
Distracted driving
120
If the vehicle has air brakes, the air compressor drive belt should be checked before each drive in what condition should the belt be in?
Tight
121
If you realize you may be late to your destination, you should:
Deal with it and drive a safe speed
122
Compared to talking on a cell phone, texting is:
More dangerous
123
A way to prevent the vehicle from rolling backwards when you start is to:
Partly engage the clutch before taking the foot off the brake
124
What part of the truck is the air compressor connected to?
Engine
125
What color lights indicate ABS brakes are not working
Yellow
126
Rust around wheel nuts may mean:
The nuts maybe loose
127
If another driver is tailgating you you should:
Increase your following distance with the vehicle in front
128
Talking on a hands-free cellphone:
can be distracting to the driver
129
If equipped with a hand valve, the hand valve can be used to:
Prevent the truck from rolling backwards when starting from a stop.
130
What should you do if your vehicle gets stuck on railroad tracks?
Get out of the vehicle and call fro assistance
131
Texting should
Never be done
132
To control a surge, when stopping:
do not release the brakes too soon
133
You may not consume alcohol within how many hours of going on duty?
Four hours
134
Which of the following is not a reason to cover cargo?
To prevent other drivers from looking at what is being transproted
135
When using a turn signal, when should the turn signal be canceled?
After the turn is completed
136
The effects of alcohol are felt:
With the first drink
137
A pre-trip inspection should be done:
The same way each time, so you are less likely to forget something
138
What do air brakes use
compressed air
139
What is the only way to sober up after drinking
waiting
140
What is black ice
A thin layer of ice on the road
141
When taking the on-road driving test:
You must take the test with the type of vehicle you want to be licensed.
142
Shaded areas of a road:
Will remain slick after other areas have melted
143
When driving a vehicle with ABS, you should
Brake as you normally would
144
If convicted of a traffic violation, you must inform your employer:
Within 30 days
145
Distracted driving:
Can be avoided by not engaging in complex conversations with others.
146
You should be able to stop within:
Your view of the road ahead
147
Most heavy vehicle use what system to change gears
Double clutching
148
When driving, mirrors should be used
Regularly
149
What do air brakes use to make the brakes work?
Compressed air
150
If unsure whether a trailer has ABS you can:
Look under the trailer for wheel speed sensors coming from the back of the brakes.
151
How long is a CDL valid
4 years
152
In an emergency, if you must leave the roadway and use the shoulder, you should:
Try to leave the shoulder as quickly as possible.
153
Stab braking should not be used on vehicles equipped with?
anti-lock brakes
154
The first offense for driving a commercial vehicle under the influence of drugs or alcohol will cause you to loose your CDL for:
1 year
