FREE CDL Combination Vehicles Practice Test Online | South Carolina 2024 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 2021, 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.
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2024 South Carolina | Frequently Asked Questions
In South Carolina, a Commercial Driver's License (CDL) Class B allows the holder to operate single vehicles with a Gross Vehicle Weight Rating (GVWR) of 26,001 pounds or more, or any such vehicle towing another not in excess of 10,000 pounds. This includes buses, farm labor vehicles, and any vehicle designed to transport 16 or more passengers.
A Class B Commercial Driver's License (CDL) in South Carolina allows the holder to operate single vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or any such vehicle towing a vehicle not in excess of 10,000 pounds GVWR. This includes buses, farm tractors, dump trucks, delivery trucks, and utility trucks.
To acquire a Class B CDL in South Carolina, you must be at least 18 years old (21 for interstate driving), possess a valid South Carolina driver's license, pass a vision test, and complete a Commercial Driver's License (CDL) application. Additionally, you must pass the written knowledge exam and the skills test, which includes a pre-trip vehicle inspection, a basic controls test, and a road test.
In South Carolina, you must be at least 18 years old to qualify for a Class B Commercial Driver's License (CDL) for intrastate driving (within South Carolina only). However, you must be at least 21 years old to drive a commercial vehicle across state lines, carry hazardous materials, or transport passengers.
While not always necessary, specific endorsements can be added to a Class B CDL license in South Carolina to provide additional driving privileges. These include endorsements for passenger vehicles (P), school buses (S), and tank vehicles (N). Each endorsement requires passing a knowledge test, and some also require a skills test.
The Class B CDL skills assessment in South Carolina involves a pre-trip vehicle inspection, a basic controls test, and a road test. The pre-trip inspection tests your ability to evaluate your vehicle's safety. The basic controls test assesses your ability to maneuver and control the vehicle. The road test evaluates your on-road driving skills, including turning, merging, and navigating intersections.
Yes, Class B CDL license holders in South Carolina are limited to driving single vehicles with a gross vehicle weight rating (GVWR) of 26,001 or more pounds, or any such vehicle towing a vehicle not exceeding 10,000 pounds GVWR. They cannot drive a Class A vehicle without the proper endorsement. Also, transporting passengers or hazardous materials may require additional endorsements.
In South Carolina, the written Class B CDL test is primarily administered in English. However, some locations may offer the test in Spanish. It's important to confirm language availability with your local DMV. Remember, even if you take the written test in another language, you must still understand English to pass the road skills test.
Yes, you can request accommodations for the Class B CDL written exam in South Carolina if you have a disability. You will need to provide documentation of your disability and specify the type of accommodation needed. Contact your local DMV office in advance to make these arrangements and to ensure they can provide the necessary accommodations.
Yes, if you don't pass the Class B CDL written test in South Carolina, you can retake it. However, you must wait at least one day before retesting. Keep in mind that each attempt may incur additional testing fees. It's recommended to study thoroughly using the South Carolina Commercial Driver License Manual before reattempting the test.
