Combination #2
Combination Vehicles Practice Test | Utah 2025 #2 Page 3 of 4
Train for FREE online with our Utah CDL combination vehicle 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 combination 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 DMV requirements for issuing a combination license may vary from state to state.
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17 . The service air line is attached to the:
Steering wheel.
The service air line carries air and is controlled by either the foot brake or trailer hand brake. The service air line is attached to relay valves, which allow the trailer brakes to be applied quickly.
18 . What is another name for the service line?
The parallel line
The trailer service air line may also be referred to as the control line or signal line.
19 . A combination vehicle has:
Four air lines.
Combination vehicles have two air lines: a service line and an emergency line.
20 . If a load is placed on one side of a trailer, the trailer:
Positioning the weight of a load on one side of a trailer may cause the trailer to lean to that side, increasing the risk of a rollover during turns and lane changes.
21 . When coupling, you should:
When coupling air brake hoses, you should make sure the proper pairs of gland hands are connected. They are sometimes color-coded to help drivers avoid mistakes. Typically, blue is used for service lines and red is used for emergency lines.
22 . When coupling a trailer, you should:
When coupling air brake hoses, you should make sure the proper pairs of gland hands are connected. They are sometimes color-coded to help drivers avoid mistakes. Typically, blue is used for service lines and red is used for emergency lines.
23 . A driver should test the tractor protection valve by:
You should test the tractor protection valve by allowing the air supply to properly charge, turning off the engine, then releasing air from the system by pressing the brake pedal several times. The tractor protection valve should move into its emergency position when psi drops to an unsafe level.
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2025 Utah | Frequently Asked Questions
To acquire a CDL Hazmat endorsement in Utah, you must first have a valid Utah CDL. Then, pass the Hazardous Materials Endorsement Knowledge Test, submit to a federal background check and fingerprinting by the Transportation Security Administration (TSA). Finally, you must pay the required endorsement fee. It's recommended to study the Utah CDL Handbook beforehand.
To obtain a CDL Hazmat license, you must have a valid Commercial Driver's License (CDL). You should be at least 21 years old, have a clean driving record, and pass a physical examination. Additionally, you must pass the Hazardous Materials Endorsement Knowledge Test and a TSA background check. It's also important to be proficient in English for reading and speaking.
When applying for a CDL Hazmat endorsement in Utah, you'll need to provide your current CDL, proof of U.S. citizenship or legal presence (like a passport or birth certificate), social security card, and proof of Utah residency. You'll also need to complete the HAZMAT endorsement application and pass the TSA background check.
Yes, there is a dedicated written test for the CDL Hazmat endorsement. It's known as the Hazardous Materials Endorsement Knowledge Test. This test assesses your understanding of the rules and regulations related to transporting hazardous materials. It's recommended to study the relevant sections in your state's CDL handbook before taking the test.
The written test for the CDL Hazmat endorsement covers a variety of topics including: understanding and identifying different types of hazardous materials, rules for safe loading and unloading, proper use of placards and labels, emergency response procedures, and specific regulations regarding the transportation of hazardous materials. It's crucial to study these areas thoroughly.
Yes, there are extra charges associated with acquiring a CDL Hazmat endorsement. In Utah, the endorsement itself costs $9.00. However, you'll also need to pay for a TSA background check, which costs $86.50. Please note these fees are subject to change and it's always best to check the latest fee structure with the Utah Driver License Division.
Yes, a background check and security clearance are required for a CDL Hazmat endorsement. The Transportation Security Administration (TSA) conducts this check, which includes fingerprinting and a review of your criminal history. If you pass the background check, TSA provides a security threat assessment to your state's licensing agency.
Yes, obtaining a CDL Hazmat endorsement requires specialized training and passing a written test. The training covers handling hazardous materials, safety procedures, and emergency protocols. After the training, you must pass the Hazmat endorsement test to demonstrate your understanding of these areas. You also need to pass a TSA background check.
No, it's illegal to transport hazardous materials without a valid Commercial Driver's License (CDL) with a Hazmat endorsement. This endorsement ensures the driver is properly trained and knowledgeable about handling and transporting hazardous materials safely. Driving without the necessary endorsement can result in hefty fines and penalties.
Yes, you can add the CDL Hazmat endorsement to your current CDL license. You don't need to apply for a new CDL. However, you'll have to pass a written test specific to hazardous materials and undergo a TSA background check. Once these are successfully completed, the endorsement will be added to your existing CDL.
