In your mirror you see a car approaching from the rear. The next time you check your mirrors you do not see the car.

Wait to change lanes until you are sure the car isnt in your blind spot

Which of these is true about hazardous materials

All hazardous material present a health and safetry threat

Convex(curved) Mirros

Show a wider area than flat mirrors show

When starting to move up a hill from a stop

Partly engage the clutch and then release the parking brake

A full stop is required at a railroad grade crossing when

The nature of the cargo makes a stop mandatory under state/---, ---federal regulations

Which of these statements about backing a heavy vehicle is NOT true

Because you can't see you should back slowly until you slightly ---, ---bump into the dock

A car suddenly cuts in front of you creating a hazard. Which of these actions should you NOT take

Honk and stay close behind the car

You should try to park so that

You can pull forward when you leave

You must complete a written vehicle inspection report each day and you must sign

the previous driver's report when any defects are noted

What is countersteering?

Turning the wheel back in the other direction after steering to avoid a ---, ---traffic emergency

Which of these statements about double-clutching and shifting is true

You can use the tachometer to tell you when to shift

The purpose of retarders is to

Help slow the vehicle while driving and reducing brake wear

When a coolant container is part of a pressurized system which of these is true?

You can check the coolant level of a hot engine

You do NOT have HAZMAT endorsement on your commercial license You can drive a vehicle hauling hazardous materials when

The vehicle dose not require placards

Avoid a crash You drive onto the right shoulder You now driving 40mph on the shoulder How should you get back pavement

--- then move back on the pavment when safe, If the shoulder is clear, stay on until the vechile has come to a stop---

Perception distance is the distance your vehicle travels from the time

The eyes see a hazard to the time the brain knows it is a hazard

When driving in cold weather your tire tread should

provide enough traction to steer and push the vehicle through snow

When stopped on a one way or divided highway you should place reflective triangles at

10 FT,100 FT and 200 FT towards approaching traffic

Involves applying brakes and releasing them after the wheels lock up

What will help keep an engine cool in hot weather

Making sure the engine has the right amount of oil

If a straight vehicle (No trailer or articulation) gose into a front-wheel skid it will

Go straight ahead even if the steering wheel is turned

Avoid driving through deep puddles/flowing water. But if you must which of these steps can help keep breaks working

Gently putting on the breaks while driving through water

Which of these is NOT true

A driver can control how fast his or her body absorbs& gets rid of Alcohol

If you are being tailgated you should

Increase your following distance

You are checking your tires for a pre-trip inspection which of these statements is true

Tires of mismatched sizes should not be used on the same vehicle

Which of these is the proper way to change lanes

Signal early before you turn and change lanes slowly and smoothly

What should you do if a car coming toward you at night keeps its high beams on

Look to the right lane or edge marking of the road

What is the first thing you should do if your breaks fail while going down hill

Get off the road as soon as possible

You are checking your brakes and suspension system for a pre trip inspection which of these statements is true

Break shoes should not have oil grease or break fluid on them

Which of these is a good thing to do while driving at night?

low speed enough that you can stop within the range of your headlights

What should you do if you are unsure whether you have enough overhead clearance

Find another route that will not require driving under the object

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1/3 Commercial Driver License Knowledge test

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Questions 100

Answers

1
The distance that you should look ahead of your vehicle while driving amounts to about ___ miles at highway speed
1/4
1/8
1/6
1/2
2
In your mirror you see a car approaching from the rear. The next time you check your mirrors you do not see the car.
ease into the other lane very slowly so the car can get out of the ---
---way if its besides you
Wait to change lanes until you are sure the car isnt in your blind spot
assume the car left the road and change lanes as normal
3
Which of these is true about hazardous materials
All public roads allow trucks carrying hazardous materials if they ---
Every truck carrying any amount of hazardous materials must have placards
---are loaded correctly
All hazardous material present a health and safetry threat
4
Optional safety equipment may include emergency phone numbers, tire chains and__
Charged fire extinguisher
Tire changing equipment
Red reflective triangles
5
Which of these pieces of emergency equipment should be carried in your vehicle?
Circut breaks
First aid Kit
Warning device for parked cars
6
Convex(curved) Mirros
Show a wider area than flat mirrors show
make objects appear closer than they really are
Make objects appear larger than they really are
7
Backing a commercial vehicle is
Always dangerous
Not dangerous if you do not have to turn
Not dangerous if you have a helper
8
When starting to move up a hill from a stop
engage the clutch and accelerate quickly
Partly engage the clutch and then release the parking brake
keep the trailer brake hand valve applied until you reach 20mph
9
A full stop is required at a railroad grade crossing when
The nature of the cargo makes a stop mandatory under state/---
The crossing is located in a city or town with frequent train traffic
There are no flagmen, warning signals or gates at the crossing
---federal regulations
10
Which of these may be a sign of tire failure
Gentle thumping
A loud hissing noise
Wheels fishtailing
11
If you do not have a CB radio, what is the first thing you should do at an accident scene
Protect the area
Care for the injured
Notify authorities
12
Truck escape ramps
are not for busses
Cannot be used by certain types of heavy vehicles
Help avoid damage to vehicles
13
Which of these statements about backing a heavy vehicle is NOT true
You should back and turn towards the driver's side whenever possible
Because you can't see you should back slowly until you slightly ---
---bump into the dock
You should use a helper and communicate with hand signals
14
A car suddenly cuts in front of you creating a hazard. Which of these actions should you NOT take
Signal and change lanes to avoid it if possible
Honk and stay close behind the car
Slow down to prevent a crash
15
You should try to park so that
Your vehicle is protected by trees or some other overhang
You can pull forward when you leave
There is at least one curb next to your vehicle
16
Which of these is NOT a type of retarder
Hydraulic
Robotic
Electric
17
You must complete a written vehicle inspection report each day and you must sign
the previous driver's report when any defects are noted
only when defects are noted that are certified to be repaired
only when defects are noted that are certified to not need repair
18
What is countersteering?
Turning the steering wheel counterclockwise
Turning the wheel back in the other direction after steering to avoid a ---
---traffic emergency
Using the steering axle breaks to prevent oversteering
19
Which of these statements about double-clutching and shifting is true
Double clutching should not be used when the road is slippery
You can use the tachometer to tell you when to shift
Double clutching should only be used with a heavy load
20
The purpose of retarders is to
Help slow the vehicle while driving and reducing brake wear
Apply extra braking power to the non-drive axies
Help prevent sidds
21
When a coolant container is part of a pressurized system which of these is true?
You can check the coolant level of a hot engine
The Radiator cap can be safely removed&coolant can be add while engin is on
You never need to check the antifreeze in such a system
22
CDL medical cerifigates must be renewed every?
Year
2 years
4 years
3 years
23
To turn right from one two-lane, two-way street to another.Your vehicle is so long that you must swing wide to turn
A
B
C
24
You do NOT have HAZMAT endorsement on your commercial license You can drive a vehicle hauling hazardous materials when
The GVWR is 26,001 pounds or less
The vehicle dose not require placards
a person who has the HAZMAT endorsement can ride with you
25
What is the term for a commercial vehicle's habit of swinging wide on a turn
Wide Rounding
Offtracking
Sidewinding
26
If you have a heavy load that is slowing you down on a upgrade you should
Drive on the shoulder so others can pass easily
Shift into a lower gear
Exit the road until traffic is lighter
27
Avoid a crash You drive onto the right shoulder You now driving 40mph on the shoulder How should you get back pavement
--- then move back on the pavment when safe
If the shoulder is clear, stay on until the vechile has come to a stop---
Keep moving at the present speed & steer very gently back onto the pavement
Brake hard to slow vehicle then steer sharply onto the pavement
28
Perception distance is the distance your vehicle travels from the time
The brain tells the foot to push the brakes to the time the foot responds
The eyes see a hazard to the time the brain knows it is a hazard
The eyes see a hazard to the time the foot pushes the brake pedal
29
When driving in cold weather your tire tread should
Be double the depth required in normal weather
be checked every 100 miles or every two hours
provide enough traction to steer and push the vehicle through snow
30
When stopped on a one way or divided highway you should place reflective triangles at
10 FT,100 FT and 200 FT towards approaching traffic
10 FT, 50FT and 100FT towards approaching traffic
10 FT, 100FT, and 500 FT toward approching traffic
31
The engine braking effect is greatest when the engine is the governed RPM'S and the transmission is the __ gears
Above, lower
Below, higher
Near,lower
32
Stab braking
Involves applying brakes and releasing them after the wheels lock up
Should only be used with hydraulic brakes
Should be used on vehicles without antilock brake system
33
Whenever you double your speed, it takes about ___ times as much distance to stop
Four
Three
two
Five
34
What will help keep an engine cool in hot weather
Making sure the engine has the right amount of oil
Driving faster to force more air into the radiator
Running the air conditioner
35
The best drivers are those who watch and prepare for hazards. The is called being
Defensive
Objective
Offensive
36
You want to turn right from one two-lane street to another Your vehicle is so long that you must swing to make the turn.
A
C
B
37
Which of these systems should receive extra attention during a winter weather inspection
Suspension
Steering
Exhaust
38
If a straight vehicle (No trailer or articulation) gose into a front-wheel skid it will
Go straight ahead even if the steering wheel is turned
Go straight ahead but will turn if you turn the steering wheel
Slide sideways and spin out
39
Which of these is NOT a danger of rough acceleration
Tire damage
Mechanical damage
Damage to coupling
40
You are driving a vehicle at 55 mph on a dry pavement, About how much total stopping distance will you need to bring it
Half the length of a football field
The length of a football field
Twice the lenght of the vehicle
41
Avoid driving through deep puddles/flowing water. But if you must which of these steps can help keep breaks working
Apply hard pressure on brake,pedal&accelerator after going out of the water
Turning on your brake heaters
Gently putting on the breaks while driving through water
42
Which of these is NOT true
Alchol goes directly from the stomach to the bloodstream
BAC is determined by how you drink, how much your drink and your weight
A driver can control how fast his or her body absorbs& gets rid of Alcohol
43
If you are being tailgated you should
Increase your following distance
Flash your break lights
Signal the tailgater when it is safe to pass you
44
You are checking your tires for a pre-trip inspection which of these statements is true
2/32 inch tread depth is safe from the front tires
Tires of mismatched sizes should not be used on the same vehicle
Radial and bias ply tires cam be used together on the same vehicle
45
Whenever you double your speed your vehicle has about __ times the destructive power if it crashes
two
Three
Six
Four
46
Which of these is the proper way to change lanes
Signal just as you begin to change lanes and drift over slowly
Signal early before you turn and change lanes slowly and smoothly
Signal bedore yuo change lanes and then move over quickly
47
What should you do if a car coming toward you at night keeps its high beams on
Flash your high beams quickly to the other driver
Look to the right lane or edge marking of the road
Slow down and look straight ahead in your lane
48
What is the first thing you should do if your breaks fail while going down hill
Call or radio for help
try to use your parking break to stop
Get off the road as soon as possible
49
You are checking your brakes and suspension system for a pre trip inspection which of these statements is true
Just one missing leaf spring is not dangerous
Break shoes should not have oil grease or break fluid on them
Spring hangers that are cracked but still thigh are not dangerous
50
Which of these is a good thing to do while driving at night?
Look directly at oncoming headlights only briefly
low speed enough that you can stop within the range of your headlights
Keep your instrument lights bright
51
What should you do if you are unsure whether you have enough overhead clearance
Slow down slightly and try to drive under the object
Estimate the high of the overhead object if it is not posted
Find another route that will not require driving under the object
52
Checking your steering/exhaust systems in pretrip inspection Which of these problems if found should be fixed
Gray smoke from the exhaust pipe
Oil on the tie rod
Steeringwheel play of more than 10degrees(2inches on 20inch steering wheel)
53
You are driving a 40-foot vehicle at 35 mph. The road is dry& Visibility is good what is the least amount of space that
4 seconds
3 seconds
7 seconds
8 seconds
54
Implied consent means
You have given your consent to be tested for alcohol in your blood
It is understood that you may drink alcohol now and then
You have given your consent to inspection of you vehicle for alcohol
55
What should you do before driving in mountains
unhook your steering axie brakes
Carry tire chains in your vehicle
Know the escape ramp locations on your route
56
You can see a marking on a vehicle ahead of you their marking is a red triangle with an orange center.
it is being driven by a student driver
It may be a slow moving vehicle
The vehicle is hauling hazardous materials
57
Placecards must be
Placed on all four sides of a vehicle
Placed only on the front and rear of vehicle
Displayed on all vehicles hauling any amount of hazardous material
58
Which of these should be tested while the vehicle is stopped
Parking brake
Service brake
Hydraulic brake
59
For your safety, when setting out reflective triangles you should
Keep them out of sight while you walk to the spots where you set them out
Carry the triangles at your side
---ongoing traffic
Hold the triangles with the reflective side between yourself and ---
60
What is the best advice for drivers when a heavy fog occurs
Alternate your low and high beams to improve your vision
Do not drive to slowly or other drivers may hit you
Park at a rest area or truck stop until fog has lifted
61
Which of the below is not characteristic of a front tire failure
Difficult steering
Vehicle fishtail
Steering Wheel twisting
62
How far should a driver look ahead of the vehicle when driving
1-2 seconds
5-6 seconds
12-15 seconds
63
Which of these statements about staying alert to drive is true
if you must stop, pull over on the side of the road for a short nap
---half-hour nap
Sleep if the only thing that can overcome fatigue
A half-hour break for coffee will do more to keep you alert than a ---
64
Containerized loads
should comoe with their own tiedown device or locks
Are generally used when freight is carried part way by rail or ship
Do not require inspection or securing by the driver
65
The Commercial Driver Supplement suggests several things to do when you pass a vehicle Which of these is NOT one of them
---on until you have completely passed the vehicle
Assume the other driver does not see you
Lightly tap your horn, if needed
At night, turn on your high beams before you start to pass & leave them ---
66
You are checking your breaks & suspension system for a pre-trip inspection which of these statements are true
Spring hangers that are cracked but still tight are not dangerous
Just one missing leaf spring is not dangerous
Brake shoes should not have oil,grease or brake fluid on them
67
mountain driving, you will have to use lower gears to drive safely on grades. Which of these dose
The tread type
Weight of the load
Length of the grade
68
Most serious skids result from
Decelerating too fast
Driving to fast for conditions
Turing sharply
69
During a vehicle inspection, checking the ___ will NOT help prevent a fire?
Cargo ventillation
electrical system insulation
battery fluid level
70
Which of these is NOT true about Engine belts in hot weather
Loose belts will not turn the water pump and or fan on properly
You can check the tightness of the belts by pressing on them
Crackling is likely to occur but is not a safety threat
71
You should signal continuously while turning because
most vehicles have self-canceling signals
it is illegal to turn off your signal before completing a turn
you need both hands on the wheel to turn safely
72
Which of these is NOT the proper use of a vehicle lights
Flashing your break lights to warn someone behind that you are slowing down
Turn on your headlights on the day when visility is bad due to rain or snow
Flashing your brake lights to get someone off your trail
73
Which of these is a good thing to remember about drinking alcohol
Alcohol first affects judgment and self control which are ---
---necessary for safe driving
Small quantities of alcohol improve reaction time
The driver can control how fast the body gets rid of alcohol
74
Which of these is NOT part of the pre-trip inspection of the engine department
Valve clearance
Engin oil level
Worn electrical wiring insulation
75
When you are parked at the side of the road at night you must
pull out your emergancy warning device within 30 minutes
use your tailights to give warning to other drivers
turn on your 4-way emergency flashers to warn others
76
One reason that dry bulk tanks requires special care is
They can easily catch fire
they can only be filled halfway
the load can shift
77
CDL medical certificates must be renewed every
6 months
Two years
One Year
Three Years
78
The distance that you should look ahead of your vehicle while driving amounts to about___ mile at highway speed
1/4
1/8
1/2
79
To avoid a crash you had to drive onto the right shoulder. You are now driving at 40mph on the shoulder. How should you
Keep moving at the present speed& steer very gently back onto the pavment
Brake hard to slow the vehicle then steer sharply into the pavement
--- the move back onto the pavement when safe
If the shoulder is clear stay on until your vehicle has come to a stop ---
80
If you must cross into the outcoming lane as you make a turn you should
allow enough space to get completely across the interaction
back up to allow oncoming traffic to pass
complete your turn without stopping
81
How many missing or broken leaves in any leaf spring will cause a commercial vehicle to be placed in out of service
One-third of the total number
One-fourth of the total number
One-half of the total number
82
Which of these statements about double-clutching and shifting is true?
You can use the tachometer to tell you when to shift
Double clutching should only be used with a heavy load
Double clutching should not be used when the road is slippery
83
Which of these is true about mirror adjustment?
The mirrors can be adjusted correctly even if the trailer is not straight
You should adjust your mirrors prior to starting a trip
You can adjust the mirrors when you are driving
84
Controlled Braking
should only be used with hydraulic brakes
involves locking the wheels for short periods of time
is used to keep a straight line when braking
85
Which of these is a good thing to do when steering to avoid a crash
Apply the breaks when turning
Avoid countersteering
Don't turn any more then needed to clean what is in your way
86
Why is a broken exhaust system dangerous?
You can pollute the air with exhaust smoke
Loud noise could damage the divers ears
Poision fumes could enter the cab or sleeper barth
87
You are starting your vehicle in motion from a stop. As you apply power to the drive wheel they start to spin.You should
Take your foot off the accelerator and apply the brakes
Try a lower gear
Take yout foot off the accelerator
88
On which fires can you use water
Tires
Gasoline
Electrical
89
You can see a marking on a vehicle ahead of you. The marking is a red triangle with an orange center. What does it mean?
it is being driven by a student driver
It may be a slow moving vehicle
The vehicle is hauling hazardous materials
90
How do you correct a rear wheel braking skid
Downshift
Stop accelerating
Apply more power to the wheels
91
You are driving a new truck with a manual transmission what gear will you probably have to use to take a
A higher gear than you would use to climb the hill
The same gear you would use to climb the hill
A lower gear than you would use to climb the hill
92
Which of these statements about shipping hazardous,materials is true
A four inch diamond shape hazardous material label must be on the container
a four inch circular red hazardous material label must be on the container
Gas cylinder that will not hold a label must be shipped under cover
93
Strong winds most affect driving
on open highways
Upon exiting tunnels
on bridges or over passes
94
Your brakes can get wet when you drive through heavy rain. What can this cause when the breaks are applied
Excessive break wear
Trailer jacknife
Hydroplaning
95
You are driving a heavy vehicle. You must exit a highway using an offramp that curves downhill You should
slow down to be at a safe speed before the curve
wait until you are in the curve before downshifting
Slow to the posted speed limit for the off ramp
96
Why will your vehicle's speed naturally increase on downgrade
the engine runs smoother
Gravity
lack of traction
97
*For the first offense of driving a commercial vehicle under the influence of alcohol or drugs, you will lose your
6 months
1 year
3 months
Will suspended for 2 weeks and attend a class about drinking and driving
98
What is the proper way to hold a steering wheel?
With both hands close together, near the top of the wheel
With both hands close together near the bottom of the wheel
With both hands on opposite sides of the wheel
99
Retarders
Cannot be used on highways
Allow you to disconnect the steering axie brakes
Can cause the drive wheels to skid when they have poor traction
100
Which statement is true
Most people are more alert at night than during the day
Most hazards are easier to see at night than during the day
Many heavy vehicle accident occur between midnight and 6 a.m.

1/3 Commercial Driver License Knowledge test Flashcards | StudBud