colorado
CDL Practice Test

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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

How much space should there be between the lower and upper fifth wheel?

2 / 40

What is the first thing to do if your vehicle catches fire while driving?

3 / 40

What are the three hazard classes should NOT be loaded into a trailer that has a heater air conditioner unit?

4 / 40

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

5 / 40

To avoid rollover when going through a curve, the best thing to do is:

6 / 40

Your engine runs a pump when you are delivering compressed gas. Should you turn off your engine before or after you unhook the hoses after finishing that delivery?

7 / 40

How often should you check the tires if your placarded trailer has dual tires?

8 / 40

This object is not checked at the rear of the trailer.

9 / 40

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

10 / 40

How should the trailer be lined up when preparing to back the tractor up?

11 / 40

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

12 / 40

Tires should should be replaced:

13 / 40

This object is required to be checked for damage, that it's secure, and strong enough to handle any cargo.

14 / 40

Before backing under the trailer after connecting the air lines you should:

15 / 40

What can side to side surge cause?

16 / 40

Select the factor that is known to cause brakes to fail or fade. (more than one answer may be correct, but select only one)

17 / 40

Off-tracking happens when going around a corner and:

18 / 40

A placarded vehicle must carry what type of fire extinguisher?

19 / 40

To prevent a roll over a driver can 1) keep the cargo as low to the ground as possible and 2) _____.

20 / 40

The 3 parts of the air brake system are: service brakes, parking brakes, and ____.

21 / 40

Select the true statement about convex ("spot") mirrors.

22 / 40

Select the true statement in regards to the liquid inside of a bulk tank causing a tank truck to roll sideways.

23 / 40

Select the true statement about empty trucks:

24 / 40

What is the purpose of the supply pressure gauge?

25 / 40

A driver that hauls hazardous materials must attend training every:

26 / 40

Always try to back toward the driver's side because

27 / 40

A trailer is at the right height to have the tractor backed up to it when:

28 / 40

You are inspecting the_____when looking for broken welds, cracks, holes, or other damage to the longitudinal frame member, cross members, box, and floor.

29 / 40

If your bus has an emergency exit door, it must:

30 / 40

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

31 / 40

You should back up slowly until____when coupling the trailer.

32 / 40

Which of the following is NOT an important reason to look far ahead when you are driving?

33 / 40

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

34 / 40

Never refuel your bus:

35 / 40

If students must cross the street, when they get off the bus, which statement is true?

36 / 40

Select how you would check the truck's slack adjusters.

37 / 40

You do not have to stop at railroad crossings, but must slow down and carefully check for other vehicles:

38 / 40

A portable tank differs from a cargo tank in that ______.

39 / 40

It has just reached freezing. Which of the following areas is slippery?

40 / 40

Forward and back surge is powerful in this type of tanker.

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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.