Combination #2
Combination Vehicles Practice Test | Utah 2026 #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 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 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.
2026 Utah | Frequently Asked Questions
To get a CDL Passenger endorsement in Utah, first obtain a Commercial Driver's License (CDL). Next, pass the Passenger Endorsement knowledge test. After passing the test, you'll need to complete a skills test in the type of vehicle you plan to drive. The Utah Driver License Division provides study materials and scheduling for these tests.
To obtain a CDL Passenger license in Utah, you must be at least 21 years old, possess a valid Commercial Driver's License (CDL), and pass the Passenger Endorsement knowledge test. You also need to pass a skills test in the vehicle type you plan to drive. A clean driving record and passing a medical examination are also required.
While specific training isn't legally required for a CDL Passenger endorsement in Utah, it's highly recommended. Understanding how to handle larger vehicles and passenger safety is crucial. Experience is gained through the skills test, where you'll operate the type of vehicle you plan to drive. Study materials are provided by the Utah Driver License Division.
Yes, acquiring a CDL Passenger endorsement in Utah requires passing an additional written knowledge test on top of the standard CDL exam. This test covers topics specific to transporting passengers, such as safety procedures, vehicle inspection, loading/unloading passengers, and emergency situations. Passing this test is mandatory to receive the endorsement.
During the CDL Passenger endorsement skills test in Utah, you'll need to demonstrate your ability to inspect your vehicle, check safety equipment, load and unload passengers safely, and manage emergency situations. You'll also need to show proficiency in maneuvering the vehicle, including starting, stopping, turning, and backing up.
No, you cannot legally transport passengers in Utah without a valid CDL Passenger endorsement. This endorsement is required for drivers of vehicles designed to carry 16 or more passengers, including the driver. Driving such vehicles without the proper endorsement can result in fines, license suspension, and other penalties.
Yes, you can add the CDL Passenger endorsement to your existing Commercial Driver's License (CDL). To do so, you'll need to pass the Passenger Transport Test, which includes both a knowledge test and a skills test. Once you've passed, the endorsement will be added to your CDL. You do not need to apply for a new license.
Yes, there are specific limitations for drivers with a CDL Passenger endorsement in Utah. For instance, you cannot transport passengers in a vehicle for which you don't have the proper class of CDL. Additionally, if your license has a "P" restriction, you're not allowed to operate a bus. Violating these restrictions can result in fines or loss of your CDL.
Yes, there are age-related prerequisites for acquiring the CDL Passenger endorsement in Utah. You must be at least 21 years old to drive a commercial vehicle across state lines or to carry hazardous materials. However, if you're 18 years or older, you can get a CDL for intrastate travel (within Utah only).
With a CDL Passenger endorsement in Utah, you're eligible to operate commercial vehicles designed to transport 16 or more passengers, including the driver. This includes buses, shuttle vans, and certain types of limousines. However, the specific class of your CDL (A, B, or C) may further determine the exact types of vehicles you can drive.