Combination #1
Combination Vehicles Practice Test | South Carolina 2026 #1 Page 2 of 3
Train for FREE online with our South Carolina 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 SC 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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8 . When should the trailer hand valve be used?
The trailer hand valve, also called the trolley valve or Johnson bar, is used to work the trailer brakes. It should be used only to test the brakes. Using it while a vehicle is in motion could cause a skid.
9 . One way to prevent a rollover is to:
Keep cargo as far from the ground as possible.
A rollover is more likely if cargo is unevenly loaded in a rig. To help prevent a dangerous rollover, it is important to keep a load as centered on the rig as possible.
10 . In a vehicle equipped with an automatic tractor protection valve, the valve will pop out when:
Air pressure is above 45 psi.
In vehicles equipped with an automatic tractor protection valve, the valve will pop out if air pressure drops to a level between 20 and 45 psi. When the valve pops out, the protection valve will close, stopping the flow of air.
11 . 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.
12 . Push in the trailer air supply control to:
Supply the trailer with air.
Push in the trailer air supply control to supply the trailer with air. Pull out the trailer air supply control to turn off the air supply and activate the emergency brakes.
13 . When driving a trailer with ABS, you should:
Try to not brakes as often as you would when driving a vehicle without ABS.
When driving a tractor-trailer combination equipped with an Anti-Lock Braking System (ABS), you should brake in the same manner that you would if operating a vehicle without ABS.
14 . What is the Johnson bar?
The trailer hand valve, also called the trolley valve or Johnson bar, is used to work the trailer brakes. It should be used only to test the brakes. Using it while a vehicle is in motion could cause a skid.
See the exact questions that will be on the 2026 South Carolina DMV exam.
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2026 South Carolina | Frequently Asked Questions
To acquire a CDL Passenger endorsement in South Carolina, you must first hold a valid CDL. Then, you need to pass the Passenger Transport Test, which covers the special rules and skills for carrying passengers. Lastly, you must pass a driving test in a vehicle similar to one you'll be operating with passengers.
To obtain a CDL Passenger license in South Carolina, you must be at least 21 years old, hold a valid Commercial Driver’s License (CDL), pass a Passenger Transport written test, and complete a skills test in the type of vehicle you'll be driving. A background check and medical examination may also be required.
While South Carolina doesn't require specific training to secure a CDL Passenger endorsement, it's beneficial to have experience driving large vehicles. However, you must pass the Passenger Transport written test and a skills test in a passenger vehicle. Training programs can help prepare you for these tests and enhance your driving skills.
Yes, in South Carolina, to obtain a CDL Passenger endorsement, you must pass the Passenger Transport written knowledge test. This test focuses on specific rules and safety guidelines for transporting passengers. The test covers areas like inspecting passenger vehicles, loading/unloading passengers, and emergency procedures. You may also need to take a road skills test in a passenger vehicle.
During the CDL Passenger endorsement assessment, you'll need to demonstrate your ability to inspect your vehicle, manage passenger entry and exit, handle emergencies, and navigate different road types safely. You'll also need to show proficiency in maneuvering the vehicle through turns, intersections, and various traffic conditions.
No, it's illegal to transport passengers commercially without a valid CDL Passenger endorsement in South Carolina. This endorsement ensures that drivers have the necessary knowledge and skills to safely transport passengers. Violating this can result in fines, loss of commercial driving privileges, and even legal consequences.
Yes, you can add the CDL Passenger endorsement to your existing commercial driver's license. You don't need to apply for a new license. However, you will need to pass the passenger endorsement knowledge test and, in some cases, a skills test. Check with the South Carolina DMV for specific requirements.
Yes, there are restrictions for drivers with a CDL Passenger endorsement. They must comply with all federal and state regulations, including hours of service rules. They cannot transport more passengers than the vehicle is designed for, and they must ensure that all passengers use seat belts. Violation of these rules can lead to fines or loss of endorsement.
Yes, to obtain a CDL Passenger endorsement in South Carolina, you must be at least 21 years old. This is a federal requirement for any driver operating a commercial vehicle that crosses state lines. However, if you're only driving within South Carolina, you may be able to get a CDL at age 18. Always check with the South Carolina DMV for specific state requirements.
With a CDL Passenger endorsement in South Carolina, you can operate commercial vehicles designed to carry 16 or more passengers, including the driver. This includes buses, school buses, shuttle vans, and some types of limousines. Remember, the exact type of vehicle you can drive also depends on other endorsements and restrictions on your CDL.
