Air Brakes #1
Air Brakes Endorsement Test | Colorado 2025 #1 Page 4 of 4
Train for FREE online with our Colorado CDL air brake 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 Class A/Class B driver license in 2025, 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 the requirements for CDL may vary from state to state.
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19 . During an applied leakage test, the maximum leakage rate for a double combination vehicle is:
4 psi in a minute.
It is important to know the maximum air loss rate that is safe for your specific vehicle. A double combination vehicle should have a leakage rate no higher than 4 psi in a minute during an applied leakage test.
20 . What happens if the air pressure in a system's air tanks falls below 60 psi?
The vehicle should stop.
In an air brake system, a low pressure warning signal should activate if the pressure in the air tanks falls to a level below 60 psi. This signal may be in the form of a warning light or a wig wag.
21 . To stop in a vehicle that uses air brakes, the driver should:
Pull the brake pedal up.
To make a normal stop in a vehicle with air brakes, push the brake pedal down. The harder the pedal is pressed, the more air pressure is released.
22 . What does the air compressor governor do?
Controls the temperature of the air leaving the air storage tanks.
In an air brake system, the air compressor governor controls when the air compressor pumps air into the air storage tanks.
23 . During an applied leakage test, the maximum leakage rate for a triple combination vehicle is:
4 psi in a minute.
It is important to know the maximum air loss rate that is safe for your specific vehicle. A triple combination should have a leakage rate no higher than 6 psi in a minute during an applied leakage test.
24 . When the brake pedal is pushed down, air brakes work:
Only if it is warm outside.
Because air takes time to flow through the air lines to the brakes, air brakes cannot begin working instantly. There is often a brake lag of at least one-half of a second between the moment the brake pedal is pressed and the moment the brakes begin to work.
25 . When inspecting your brakes, a slack adjuster should move ____ from where it is attached to the push rod.
No more than one inch
Check each slack adjuster after 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.
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2025 Colorado | Frequently Asked Questions
To acquire a CDL Hazmat endorsement in Colorado, you need to pass the Hazardous Materials Endorsement Knowledge Test. Before the test, you must submit fingerprints for a TSA background check. Upon passing the test and background check, the endorsement will be added to your CDL. The process may take several weeks.
To obtain a CDL Hazmat license, you must have a valid Commercial Driver's License (CDL). You also need to pass a Hazardous Materials Endorsement Knowledge Test and a TSA background check. Applicants must be at least 21 years old, have U.S. citizenship or legal permanent residency, and be physically fit to handle hazardous materials.
When applying for a CDL Hazmat endorsement, you'll need your current Commercial Driver's License (CDL), proof of U.S. citizenship or legal permanent residency (like a passport or birth certificate), and proof of Colorado residency. You'll also need to provide fingerprints for a TSA background check and pass the Hazardous Materials Endorsement Knowledge Test.
Yes, there is a dedicated written test for the CDL Hazmat endorsement. This test is designed to assess your knowledge of the rules and regulations associated with transporting hazardous materials. It covers topics like loading and unloading hazardous materials, bulk packaging marking, driving and parking rules, and emergency response procedures.
The written test for a CDL Hazmat endorsement covers a variety of topics related to hazardous materials. These include identifying different types of hazardous materials, understanding placards and labels, knowing how to safely load and unload hazardous materials, learning emergency procedures, and understanding the rules for transporting hazardous materials.
Yes, there are additional charges for acquiring a CDL Hazmat endorsement in Colorado. These include the application fee, fingerprinting fee for the TSA background check, and the knowledge test fee. The exact costs can vary, so it's recommended to check with the Colorado Department of Motor Vehicles for the most current fees.
Yes, to obtain a CDL Hazmat endorsement in Colorado, you must undergo a federal background check and fingerprinting. This is mandated by the Transportation Security Administration (TSA) to ensure the safety and integrity of hazardous materials transportation. The background check includes checking criminal, immigration, and terrorist records.
Yes, specialized training is mandatory for the CDL Hazmat endorsement. Applicants need to pass a written test that covers regulations and procedures related to hazardous materials. They also need to undergo a TSA security threat assessment, which includes fingerprinting and background checks. After passing these, they receive the Hazmat endorsement.
No, you cannot transport hazardous materials without a valid CDL Hazmat endorsement. In Colorado, it's illegal to transport hazardous materials without this endorsement. Violating this rule can result in severe penalties including fines, imprisonment, and loss of your commercial driving privileges. Always ensure your endorsements are up to date.
Yes, you can add the CDL Hazmat endorsement to your current CDL license in Colorado. You don't need a new license, but you must pass a written knowledge test and undergo a federal background check. Once these steps are completed successfully, the Hazmat endorsement will be added to your existing CDL license.
