Tank Endorsement Test | Colorado 2026 #1

Train for FREE with our Colorado tank endorsement practice test online. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a CO tank license in 2026, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that DMV requirements for issuing a CDL tank vehicle endorsement may vary from state to state.

Number of Question 20

Passing Score 16

Number of Tests 20

1 . If using a helper while backing a vehicle, where should they stand?

In front of the passenger side

In front of the driver side

On the wide of the truck

Near the back of the truck

If you use a helper while backing your vehicle, they should stand near the back of the vehicle in a place where they are visible to you. Before backing, work out a set of hand signals that both you and your helper understand. Agree on a signal for "stop."

2 . Move over laws require:

Trucks to use the left lane.

All vehicles to vacate the lane closest to an emergency vehicle that is stopped with its lights flashing.

All vehicles to use the left lane.

All vehicles to move to the left lane if a flatbed trailer is in the right lane.

If an emergency vehicle with its lights on is stopped on the side of the road, move over laws require drivers to vacate the lane directly next to the vehicle, if possible. If a driver cannot move over safely, they must slow down and proceed with caution.

3 . Stopping distance can be affected by:

Speed.

Temperature.

Time of day.

Traffic.

Stopping distance is affected by a vehicle's speed. The faster you are driving, the longer your stopping distance will become.

4 . When checking your tires, which of the following is not an issue to correct?

Too much air pressure

Too little air pressure

Radial and bias-ply tires used together

Tread depth of at least 4/32 of an inch on the front tires

Problems to check for when inspecting tires include: air pressure that is too low or too high; using radial and bias-ply tires together; tread depth of less than 4/32 of an inch in major grooves on front tires; and tread depth of less than 2/32 of an inch on all other tires.

5 . Roads are most slippery right after it begins to rain because:

The water mixes with oil and grease on the road.

The roads are naturally slippery.

The gravel gets washed to the middle of the lane.

Some tires are not designed for rain.

Roads are particularly slippery when it first begins to rain. The water mixes with oil drippings on the road that have not yet washed away, creating a slippery and dangerous mixture.

6 . If you are being tailgated, you should:

Drive on the shoulder.

Pull off the roadway.

Drive faster.

Allow the vehicle to pass.

If someone is tailgating you, it is a good idea to open up the space ahead of your vehicle to make it easier for the driver to pass you. Increasing your speed is not a good idea because the driver may continue to tailgate you at the higher speed, only increasing the danger.

7 . Rims with welding repairs:

Are unsafe.

Are acceptable on tires in the rear of the vehicle.

Are acceptable only when carrying a heavy load.

Are acceptable in combination vehicles.

A driver should inspect wheels before a drive, specifically looking for damage on the wheels and rims. Wheels or rims that have had welding repairs are not safe for use.

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2026 Colorado | Frequently Asked Questions

To secure a CDL Bus endorsement in Colorado, you must first have a valid Commercial Driver's License (CDL). Next, pass the Passenger Vehicles Endorsement Knowledge Test and the School Bus Endorsement Knowledge Test. Finally, pass a driving skills test in the type of school bus you wish to drive. All tests are administered by the Colorado DMV.

To obtain a CDL Bus license in Colorado, you need to have a valid driver's license, pass a medical examination, and complete a CDL application. After that, you must pass the General Knowledge Test and the Passenger Transport Test. Finally, you will need to pass a skills test in a vehicle similar to the one you'll be driving.

Yes, specific training is necessary for a CDL Bus endorsement in Colorado. Applicants must complete a commercial driver's license training course that includes both classroom and behind-the-wheel instruction. Additionally, they must pass written and skills tests specific to the type of bus they wish to drive, demonstrating knowledge of safety procedures and handling.

CDL Bus licenses fall under three main classes in Colorado: Class A, B, and C. Class A is for any combination of vehicles with a Gross Combination Weight Rating (GCWR) of 26,001 lbs or more. Class B is for a single vehicle with a Gross Vehicle Weight Rating (GVWR) of 26,001 lbs or more. Class C is for vehicles designed to transport 16 or more passengers (including the driver), or hazardous materials.

No, you cannot use your personal vehicle for the CDL Bus driving test in Colorado. The test must be taken in a vehicle that matches the class and type of the CDL you are applying for. In this case, you must take the test in a commercial bus similar to the one you plan to drive professionally.

The CDL Bus driving test evaluates a variety of skills. These include pre-trip vehicle inspection, basic vehicle control (backing, turning, and stopping), and on-road driving, which involves lane changes, highway driving, and interaction with traffic. Additionally, specific bus operation skills such as loading/unloading passengers, railroad crossing procedures, and emergency exit procedures are also assessed.

Yes, in Colorado, to obtain a CDL Bus endorsement, applicants must pass a Department of Transportation (DOT) physical exam. This test evaluates vision, hearing, blood pressure, and checks for conditions like diabetes and epilepsy. Applicants must also be free from any physical or mental condition that might affect their ability to safely operate a commercial vehicle.

No, it's not permissible. In Colorado, as in all U.S. states, a valid Commercial Driver's License (CDL) with a Passenger (P) endorsement is required to legally transport passengers in a commercial vehicle. Driving without the appropriate license or endorsement can lead to serious penalties including fines and suspension of driving privileges.

You can add a CDL Bus endorsement to your existing Commercial Driver's License in Colorado. It's not necessary to apply for a new license. However, you will have to pass the Passenger Transport Test, and in some cases, a skills test in the type of vehicle you wish to drive. Always check with your local DMV for specific requirements.

Yes, there are restrictions for drivers with a CDL Bus endorsement in Colorado. Drivers must not have any serious traffic violations within the past two years. They're also required to maintain a clean driving record, pass regular physical exams, and comply with drug and alcohol regulations. Violating these can result in temporary or permanent loss of the endorsement.