colorado
CDL Practice Test

Welcome to the Colorado CDL practice test site. Topics covered in these practice tests are designed to prepare you for the Colorado Department of Motor Vehicles CDL test. These tests are free and you are able to take tests as many times as you would like as you prepare to obtain your Colorado CDL. You will be presented with 40 questions and you must answer 34 questions correctly to pass. There is a 50-minute time limit. You may not go back once you answer a question. Click the "Start Test" button below to begin.

1 / 40

Operating a motor vehicle with the intent of doing harm to others or physically assaulting a driver or their vehicle is known as?

road rage

aggressive driving

tailgating

defensive driving

2 / 40

What are spring brakes?

they do not function when the psi falls below 30 psi

all of these answers are correct

they are powerful springs that hold back air pressure when driving

they are brakes that automatically come on for a truck or trailer when the psi drops too low

3 / 40

What is the purpose of a driver placarding his or her vehicle?

Giving people something interesting to look at while driving.

Forcing other drivers to stay 20 feet away in every direction.

Warning those with children to drive in another lane.

Communicating risk.

4 / 40

With Division 1.1, 1.2, or 1.3 Class A or B, how close can you park to a bridge, tunnel, or building?

Do not park within 500 feet.

Do not park within 200 feet.

Do not park within 100 feet.

Do not park within 300 feet.

5 / 40

If you park the trailer at an angle to the tractor when uncoupling:

damage could occur to the landing gear

you will have more space to maneuver in the lot

you won't have to take as many steps around the vehicle

the process will be faster and easier

6 / 40

You should place the starter switch key into your pocket while you are performing the pre-trip inspection because:

it could damage the starting mechanism

someone could start and move the truck

someone could steal the truck

all of these answers are correct

7 / 40

Select the true statement in regards to quick steering movements and double trailers:

it is easier to countersteer doubles/triples than other vehicles

you should apply a firm pressure to the brake pedal at the same moment you do quick steering movements

nothing will occur

it is easier to tip doubles and triples from quick steering movements than other vehicles

8 / 40

What action should you take if there is no phone available and you discover your hazardous materials shipment leaking at a rest stop?

Keep driving, slowly and cautiously, until you reach a phone.

Keep driving for help as quickly as possible.

Send someone for help with all the necessary information.

Leave your truck parked with emergency lights on and walk for help.

9 / 40

Where can you find a shipper’s certification?

On all packages.

On the original shipping paper.

It is a separate document that all hazmat drivers must keep in their vehicles.

There is no such thing.

10 / 40

What should you do before you begin to couple?

position the fifth wheel beforehand

check your path for any hazards

activate the spring brakes

inspect the condition of the frame of the tractor

11 / 40

Cargo tanks are:

Only made in one size.

Bulk packaging temporarily attached to your vehicle.

Filled while they are off your vehicle, then attached for transportation.

Bulk packaging permanently attached to your vehicle.

12 / 40

After deciding the type of evacuation that is necessary, the next step you must take is:

Dangle the radio microphone out of the driver window for later use.

Notifying the dispatch office of the evacuation.

Securing the bus.

Opening the emergency exits.

13 / 40

This gauge will indicate if the generator or alternator is charging:

Voltmeter/ammeter

Coolant

Gas tank

Oil pressure

14 / 40

Select the true statement in regards to driving a truck with triple or double trailers:

all answers listed

extra care should be taken when driving in bad weather and in the mountains

the risk of trailer jackknifes and tipping is increased compared to shorter trucks

the truck requires increased following distance compared to smaller vehicles

15 / 40

The _____of the kingpin has the locking jaw close around it.

dull section

tip

shank

apex

16 / 40

The front trailer supports should be____before driving away.

3 turns down from the top and the crank handle secured in its bracket

raised 1/3 of the way with the crank handle secured in its bracket

raised 1/2 way with the crank handle secured in its bracket

raised fully and the crank handle secured in its bracket

17 / 40

The reason a bulk liquid tanker is hard to handle is:

Because the cargo has a high center of gravity.

Because the cargo has a low center of gravity.

Because the cargo has a high density.

Because of the high friction point.

18 / 40

When inspecting the_____you pump the pedals 3 times and then hold it down for 5 seconds feeling for no movement to occur.

hydraulic brakes

emergency brakes

engine brakes

all answers listed

19 / 40

The trailer height is correct for connecting a converter dolly to a second trailer when:

the trailer will slightly lower when the converter dolly backed under it

the kingpin is resting behind the fifth wheel

the trailer will slightly rise when the converter dolly is backed under it

the top of the kingpin lines up with the locking jaws

20 / 40

When should air tanks be drained?

every 7 days

at the end of each working day

at every restroom break stop

they don't need to be drained

21 / 40

At what pressure is the safety valve in the air compressor tank set to open?

100 psi

125 psi

225 psi

150 psi

22 / 40

How do you test your service brakes?

after releasing the parking brake, move forward slowly and apply pressure to the brake pedal

release the air pressure and activate the parking brake

pull over and activate the parking brake

apply pressure to the brake pedal when moving at highway speeds

23 / 40

Select the false statement about suspension:

Check for shifted, missing, or cracked leaf springs.

Check to make sure torsion bars and/or arms are lubricated.

Check for broken or cracked spring hangers.

Check for distorted or broken coil springs.

24 / 40

How do you make sure the air lines are not crossed and the trailer brakes are working after supplying air to the trailer?

release the tractor brakes

listen for brake sounds as you apply pressure off and on the trailer brakes

lift the brake pedal up

activate the parking brakes

25 / 40

While driving on a clear night with low beam headlights, you should be able to stop within:

Half of a football field.

The distance you will travel in the next 20 seconds.

The distance you can see ahead of you.

2 lengths of your vehicle.

26 / 40

On a drawbridge, you do not need to stop, but must slow down and make sure it's safe, when:

Both of these answers are correct.

The bridge has an attendant or traffic officer who controls traffic whenever the bridge opens.

There is a traffic light showing green.

None of these answers are correct.

27 / 40

Bus drivers must have a commercial driver license if they drive a vehicle designed to seat more than:

15 or more persons, including the driver.

16 or more persons, including the driver.

10 or more persons, including the driver.

20 or more persons, excluding the driver.

28 / 40

What will happen right away should the service air line come apart but the emergency line is intact while driving a combination vehicle?

the emergency tractor brakes will activate

nothing will occur until you try to use the brakes

you will come to a complete stop

the trailer's air tank will leak through the one line

29 / 40

Buses may NOT have recapped or regrooved tires:

On front wheels.

On the outside rear wheels.

When it's been raining.

Anywhere except on the front wheels.

30 / 40

You should____to check the free play of manual slack adjusters on S-Cam brakes.

chock the wheels and release the parking brakes after parking on a level ground

after parking on a slight grade, release the parking brake, activate the service brakes and check for vehicle movements

apply the parking brake after stopping on level ground

drain off air pressure before adjusting after parking on level ground

31 / 40

What is the movement of the liquid called when the tanks are partially filled?

Knocking

Surging

Crashing

Framing

32 / 40

What are some of the important parts in the steering system?

tie rod, spindle, pitman arm

leaf spring, vehicle frame, torque rod

rim, lug nuts, tire

main spring, axle, spring shackle

33 / 40

Before backing under the trailer you should______when coupling a tractor and trailer with air lines already connected.

supply air to the trailer system and then pull the air supply knob out

all answers listed

press down on the brake pedal twice

have the trailer brakes off

34 / 40

When a substance in the materials table is written in italics it means :

It is the proper shipping name.

It is a foreign substance.

The substance is for international transport.

It is not the proper shipping name only those in roman type above it are proper shipping names.

35 / 40

When is it best to wear your seat belt?

Only if required by company policy.

Only if your bus holds more than 27 people.

Only when you will be driving over 35 mph.

Always.

36 / 40

Select the true statement about speed and stopping distance.

When the road is wet it will double your stopping distance.

Tank surge will decrease your stopping distance.

None of these answers are correct.

You need two times the stopping distance when driving at 40 mph compared to 20 mph.

37 / 40

A "transport index" relates to products that are:

Meant for human consumption

Radioactive

Liquid

Overweight

38 / 40

Select the inappropriate way to test for the low pressure warning signal.

have the electrical power on

turn off the engine

ask for a pedestrian to listen for the signal

decreased the air pressure by stepping on and off the brake pedal

39 / 40

The method for testing hydraulic brakes for leaks is to _____.

all of these answers are correct

pump the brake pedal 5 times and apply firm pressure for 3 seconds the pedal should not move

hold the brake down for 5 seconds and listen for leaks

pump the brake pedal 3 times and apply firm pressure for 5 seconds the pedal should not move

40 / 40

You must control how far packages labeled "Radioactive II" or "Radioactive III" are located from people and cargo space walls by referring to:

The segregation and separation chart.

The table of hazardous materials.

The list of hazardous materials and reportable quantities.

The transport index and the separation distances table.

Your score is

The average score is 0%

5/5 - (1 vote)

CDL Category Practice Tests

CDL Practice Test

How To Get A colorado Commercial Drivers License

Colorado residents the age of 18 or older can apply for their commercial driver’s license. Those between the ages of 18 and 21 are restricted to intrastate driving. Individuals must be 21 years or older to receive their Hazmat, School Bus, or Doubles/Triples Endorsements. All applicants must possess a DOT medical card issued by a FMCSA certified medical examiner in order to be eligible for their CDL.

Any applicants that fall under the following conditions are automatically disqualified from receiving a CDL.

Having more than one driver’s license.
Being disqualified for commercial driving privileges in another state.
Being convicted in the past two years of driving a commercial vehicle impaired.
Having a suspended, canceled, denied, or revoked driver’s license.

All Colorado residents who are seeking to get their commercial driver’s license must pass both one or more knowledge tests as well as a practical skills test.

Endorsements
T – Double And Triple Trailers
N – Tanker Vehicles
P – Passenger
S – School Bus
H – Hazardous Materials
X – Tanker With Hazmat

Hit the Open Road

colorado CDL License Test Tips

All applicants are required to take one or more knowledge tests to display their comprehension of the commercial driving law. Class A, B, and C applicants must complete a 50 question assessment. Class A applicants are responsible for completing an additional 20 questions all based on the subject of combination driving. Applicants seeking endorsements will be required to complete a knowledge test specific to the endorsement sought. The endorsement tests range between 20 and 30 questions. All applicants must receive a score of 80 percent or higher to pass a knowledge test.Applicants for a Colorado CDL must complete a skills test is order to receive their CDL. The skills assessment is comprised of an on-road test, vehicle inspection, and basic controls skills test. Applicants who are applying for endorsements are required to complete the skills test with the type of vehicle the endorsement is intended for.

Additional Information

Information on the Colorado Division of Motor Vehicles

The State of Colorado Department of Revenue Division of Motor Vehicles regulates the CDL requirements and testing in Colorado. To get more information contact them via:

Website: https://www.colorado.gov/pacific/dmv/im-commercial-driver

Phone: 303.205.5600

Additional Colorado CDL Helpful Links

Please use the links below to access more valuable Colorado CDL testing resources and to learn more about practice driving tests for the state of Colorado.

colorado CDL Practice Test

CDL Category Practice Tests

CDL Practice Test

How To Get A colorado Commercial Drivers License

Hit the Open Road

colorado CDL License Test Tips

Additional Information

Information on the Colorado Division of Motor Vehicles

Additional Colorado CDL Helpful Links

colorado
CDL Practice Test