Knowledge Test Class A #1
Class A Driving Test | Colorado 2026 #1 Page 7 of 7
Train for FREE online with our Colorado class A license test. 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 CDL class A permit 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 CDL class A requirements may vary from state to state.
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43 . Which of the following is not a crime that would disqualify an applicant from a hazardous materials endorsement?
Littering
There are a number of crimes that will disqualify a person from receiving a hazardous materials endorsement for seven years. Among these offenses are arson, robbery, and crimes of dishonesty, fraud, or misrepresentation. More serious crimes, such as murder, result in a lifetime disqualification.
44 . While driving, if you notice anything affecting safety or mechanics, you should:
Not use that part of the vehicle and hope others don't notice the problem.
At the end of each day of driving, you may be required to make a written report on the vehicle or vehicles driven. Be sure to make note of any issues that could affect the safety of the vehicle or that could lead to a mechanical breakdown.
45 . The air entering air storage tanks may contain:
Antifreeze.
The air that enters air storage tanks in an air brake system usually contains a certain amount of water and compressor oil. Because accumulations of these materials can damage the braking system, tanks are equipped with drains to allow their removal.
46 . While driving:
You may read text messages.
While driving, sending and reading text messages is prohibited. You may not hold a phone to make a call or press more than one button when dialing.
47 . A cargo of hanging meat:
Is discouraged during the summer months.
An operator should drive with care when transporting a cargo of hanging meat. Such a load is unstable, both because it has a high center of gravity and because the swinging of the meat can affect the driver's handling of the vehicle.
48 . To inspect slack adjusters on S-cam brakes, you need to:
Chock the wheels and disengage the parking brake.
Check each slack adjuster after parking on level ground, setting wheel chocks, and disengaging the parking brake. Pull the slack adjusters to make sure they do not move more than about one inch from where the push rod is attached. If they move more than one inch, they may be out of adjustment and will need to be fixed.
49 . Rims with welding repairs:
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.
50 . How much water must be present for a vehicle to hydroplane?
None
Hydroplaning is a phenomenon during which a vehicle's tires lose traction with the road surface and begin to glide along on water on the road. There does not have to be a large amount of water on the road for this to occur.
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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.
