Air Brakes #1
Air Brakes Endorsement Test | Utah 2025 #1 Page 4 of 4
Train for FREE online with our Utah 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 UT 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 . A safety valve is set to open at ____ pounds per square inch (psi).
The safety valve protects air tanks and the rest of an air brake system from accumulating too much air pressure. The safety valve is usually set to open at 150 psi.
20 . If using spring brakes when hauling a heavy load, a complete stop will:
Spring brakes do not work on all axles. If your vehicle's spring brakes activate due to low pressure in an air brake system, your vehicle will need a longer distance to stop than usual, especially if you are carrying a heavy load.
21 . The brake pedal is part of which braking system?
The auxiliary brake system
The service brake system applies and releases the brakes when a driver presses the brake pedal while driving normally.
22 . How is the parking brake released?
By tapping the accelerator twice
In vehicles with air brakes, the parking brake is controlled by a knob. The knob is pulled out to apply the brakes, and pushed in to release them.
23 . If the spring brakes are activated, you should never:
Open the door to the cab.
Never apply the brake pedal if your spring breaks are activated. Brakes can be damaged if they are subject to both springs and air pressure.
24 . A dual air brake system:
A dual air brake system is made up of two separate air brake systems. The systems share a single set of brake controls, but each has its own air tanks, hoses, and lines. One system typically operates the regular brakes on the rear axle or axles while the other system operates the regular brakes on the front axle.
25 . How is water and compressor oil removed from the bottom of an air storage tank?
A sponge is used to soak up the water and oil.
Water and compressor oil are removed from air storage tanks through a drain valve. The water and oil can damage the brakes if left to accumulate in the system. Manually operated tanks must be drained every day to remove this build-up.
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2025 Utah | Frequently Asked Questions
To secure a CDL Doubles/Triples endorsement in Utah, you first need a valid Commercial Driver's License (CDL). Next, study the Doubles and Triples section of the Utah CDL handbook. Then, schedule and pass the Doubles/Triples knowledge test at a Driver License Division office. After passing the test, you'll receive your endorsement. Remember, driving experience with these types of vehicles is beneficial.
To obtain a CDL Doubles/Triples license, you need a valid Commercial Driver's License (CDL). Study the Doubles and Triples section of your state's CDL handbook. Then, schedule and pass the Doubles/Triples knowledge test at your local driving license office. Upon passing, you will receive your endorsement. It's also recommended to have hands-on experience with these types of vehicles.
While it's not a legal requirement to have specialized experience or training for a CDL Doubles/Triples endorsement, it's highly recommended. This is because driving these types of vehicles requires specific skills. Studying the Doubles/Triples section of the CDL handbook and passing the knowledge test is mandatory, but practical experience can significantly improve safety and confidence.
Yes, to receive a CDL Doubles/Triples endorsement in Utah, you must pass an additional written knowledge test specifically for Doubles/Triples. This test covers the special procedures and safety considerations associated with operating these types of vehicles. It is separate from the general CDL written test. You can prepare by studying the Doubles/Triples section of your state's CDL handbook.
For the CDL Doubles/Triples endorsement, there isn't a specific skills or maneuvers test as there is with the basic CDL. The endorsement only requires a written knowledge test. However, the test will cover topics like coupling and uncoupling, inspecting doubles and triples, and managing the vehicles during different situations. These are skills you'll need to safely operate these vehicles.
No, it is not permissible to operate double or triple trailers without a valid CDL Doubles/Triples endorsement in Utah. The endorsement is required by federal and state law to ensure that drivers have the necessary skills and knowledge to safely operate these types of vehicles. Driving without the appropriate endorsement can result in fines and penalties.
You can append the CDL Doubles/Triples endorsement to your current commercial driver's license. You don't need to initiate a new application for a CDL. However, you'll need to pass the Doubles/Triples knowledge test. After passing, the endorsement will be added to your existing CDL. Remember, there's no skills test for this endorsement in Utah.
Yes, there are some limitations for drivers with a CDL Doubles/Triples endorsement. For instance, they can only drive vehicles that their base CDL allows. Additionally, all federal and state regulations regarding hours of service, vehicle maintenance, and safety inspections must be followed. Violating these rules can result in penalties or loss of the endorsement.
In Utah, double trailers can be up to 81 feet long and triple trailers up to 105 feet long. The maximum weight for both is 129,000 pounds. However, these limits can vary depending on the specific highways and routes used. Drivers should always check local regulations and restrictions before operating these types of vehicles.
Yes, drivers with a CDL Doubles/Triples endorsement must follow specific safety guidelines. These include checking that all couplings are secure, maintaining extra following distance, and taking wider turns to avoid trailer off-tracking. Also, they must be aware of the "crack-the-whip" effect, which can cause a rollover. Federal regulations also apply, such as hours-of-service rules.
