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

Select the statement that is not part of the air-brake system:

service brake system

parking brake system

emergency brake system

clutch brake system

2 / 40

In the event of an accident you should remember to do the following EXCEPT:

stop any bleeding and keep the victims warm

notify authorities

protect the area

move the victims out of the way immediately

3 / 40

Charter drivers should not:

Remind riders about rules once trip begins.

Mention rules at the start of the trip.

Allow riders on the bus until departure time.

Explain rules at the start of the trip.

4 / 40

Which of the following are possible causes of tire fires?

dual tires that touch and under-inflated tires

loose fuel connections or under-inflated tires

poor cargo ventilation or short circuits

improperly loaded cargo and dual tires that touch

5 / 40

With the controlled braking method, you _____?

repeatedly tap the brakes as fast as you can

apply the brakes as hard as you can without locking the wheels

apply the brakes all the way until the wheels lock up, release the brakes and apply them again when the wheels start to roll again

lightly apply braking pressure

6 / 40

Select the statement that best describes what the service line is for.

it is controlled by the foot brake or trailer hand brake and carries air

all answers listed

it is controlled by the trailer hand brake and carries air

it is controlled by the foot brake and carries air

7 / 40

What are shippers trying to accomplish when they package the material?

All of these answers are correct.

Make it easy to open and close.

Make it as light as possible.

Make it easy to identify.

8 / 40

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

Because of the high friction point.

Because the cargo has a low center of gravity.

Because the cargo has a high center of gravity.

Because the cargo has a high density.

9 / 40

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

damage could occur to the landing gear

the process will be faster and easier

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

you will have more space to maneuver in the lot

10 / 40

The belt that you need to make sure is securely mounted, without frays, and adjusts and latches properly is the:

The power steering belt

The air compressor belt

The seat/safety belt

The water pump belt

11 / 40

Which seats must have a seat belt:

Senior citizen seats.

Women and children seats.

The driver's seat.

All of these answers are correct.

12 / 40

Which trailer is most likely to turn over when you make a sudden turn while pulling doubles?

there is an even chance for either trailer

the front trailer is twice as likely

trailers will never turn over

the rear trailer is twice as likely

13 / 40

At around____the governor allows the air compressor to start pumping again:

125 psi

175 psi

100 psi

225 psi

14 / 40

What are spring brakes?

they are powerful springs that are restrained by air pressure when the air pressure is removed, the brakes are applied

they are large springs that are held closed by air pressure if the air pressure is increased the brakes are applied

none of the answers listed

they are big springs with air pressure in them if the air pressure decreases, the brakes are applied

15 / 40

There should be ___space between the upper and lower fifth wheel after coupling.

1/12 inch

1/8 inch

1/30 inch

none of the answers listed

16 / 40

Select the true statement about baffled tankers:

It has hollow balls in it to slow the motion of the liquid in the trailer.

None of the answers listed.

It has walls with holes inside for liquid to flow through.

It has separate tanks.

17 / 40

The minimum tire tread depth for front tires is:

3/8-inch

1/32-inch

1/2-inch

4/32-inch

18 / 40

Which of the following would NOT be part of a standard vehicle inspection?

tire problems

steering system defects

bad brake drums or shoes

seating defects

19 / 40

To find out if a shipment includes a hazardous material, you should:

Check for a fence around the loading dock.

Open and inspect every package and container.

Look at the shipping papers.

Ask the driver.

20 / 40

What does the drain valve for air tanks remove?

air and oil

oil and water

oil and dirt

water and air

21 / 40

The air leakage rate for a combination vehicle should not exceed ____psi a minute.

22 / 40

Under which two special conditions should you downshift?

before entering a curve and before going up a hill

before starting down a hill and before entering a curve

if there is an accident and in sudden heavy rain

before starting down a hill and before going up a hill

23 / 40

When transporting hazardous loads, you must check the tires at least:

Every 200 miles.

Twice every day.

Every two hours or 100 miles.

Every six hours.

24 / 40

When stopped on a divided highway where should your reflectors be placed?

15 feet, 75 feet, and 150 feet toward the approaching traffic

20 feet, 150 feet, and 300 feet toward the approaching traffic

30 feet, 100 feet, and 150 feet toward the approaching traffic

10 feet, 100 feet, and 200 feet toward the approaching traffic

25 / 40

You should check that the _____are secure, caps are on tight, and is not leaking.

cb radio

coolant system

none of the answers listed

fuel tanks

26 / 40

Why is the proper adjustment and use of all mirrors so vital to the safe operation of the school bus?

In order to observe the danger zones around the bus.

In order to see if small vehicles are driving in the bus blind spots.

In order to observe the danger zones around the bus and look for the students, traffic, and other objects in this area.

In order to clear up blind spots around the bus.

27 / 40

A bus has a GVWR of 22,000 pounds and seats 24 passengers. What CDL class is this vehicle?

Class B

Class D

Class A

Class C

28 / 40

An air system that is fully charged will typically have ___ psi of pressure.

125

200

250

29 / 40

Which of the following statements about special danger of loading and unloading is true?

Students should be told to leave any dropped objects and move to the point of safety out of danger and get the driver's attention to retrieve the object.

Students should be told not to use the handrails when exiting the bus due to the possibility of causing a clothing hang up.

Students should be told to remain seated while the bus is in motion.

Students should be told to pick up any dropped objects as long as it is not under the bus.

30 / 40

How should you know when to shift?

engine speed and road speed

every 3 to 5 seconds or engine speed

engine speed and the shift indicator light

road speed and wind speed

31 / 40

This object should not be spliced, cut, chafed, or worn through to allow steel braid to show.

Electric/air lines

Tires

Mud flaps

The lockjaw

32 / 40

Do empty trucks have the best braking?

yes, but only on wet surfaces

yes, but only if the truck is newer than 1998

yes

33 / 40

Your bus starts to lean toward the outside on a banked curve, you are:

Driving in the mountains.

Driving too fast.

Driving on a wet surface.

Driving with bad tires.

34 / 40

Select the true statement in regards to converter dollies:

they typically have small braking power because of their size

they typically require a hand converter

they typically have a lot of stopping power because of their size

they typically do not have spring brakes

35 / 40

The amount of liquid you can carry depends on:

How much you can legally carry.

The density or weight of the liquid.

All answers listed.

How much the liquid will expand during the trip.

36 / 40

What is incorrect concerning disruptive passengers?

You must ensure the disurptive rider's safety as well as that of others.

You must remove the disruptive passenger immediately for the safety of the others.

It may be safer to wait and discharge the disruptive passenger at the next scheduled stop or a well-lighted area where there are other people.

Don't discharge such riders where it would be unsafe for them.

37 / 40

What must vehicles with air brakes have?

all of these answers are correct

an air pressure gauge that shows the pressure available for braking

an air pressure gauge that shows how much air is used by the brake chambers for braking

a minimum of 2 air tanks

38 / 40

Which of the following is a key steering component?

leaf spring

bearing plate

torque rod

gear box

39 / 40

Which of the following is NOT a basic step to be taken at a crash scene?

protect the area

notify authorities

care for the injured

gather the contact information of all the drivers involved

40 / 40

How far away are you required to park from a bridge, tunnel, or building if you are carrying Division 1.2 or 1.3 materials?

At least 400 feet

At least 600 feet

At least 300 feet

At least 500 feet

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