Double Triple Test | South Carolina 2024 #2

Train for FREE with our South Carolina CDL double triple practice test online. 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 CDL double triple license in 2024, 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 may vary from state to state.

Number of Question 20

Passing Score 16

Number of Tests 20

1 . What kind of brakes do most newer heavy-duty trucks use?

Single air brakes

Dual air brakes

Triple air brakes

Most newer heavy-duty vehicles use dual air brake systems. A dual air brake system has two separate air brake systems which use a single set of brake controls.

2 . What kind of force do emergency brakes use?

Air pressure

Mechanical

Heavy

Air brakes are really three different braking systems: the service brake, the parking brake, and the emergency brake. Emergency and parking brakes are applied with mechanical force.

3 . In a vehicle with dual air brakes, a leak in one system ____ the second system.

Will always affect

May not affect

Is caused by

A dual air brake system is made up of two separate air brake systems. If there is an air leak in one system, it may not affect the other.

4 . When looking under your vehicle's hood during a pre-trip inspection, you should:

Use the parking brakes and/or chock blocks.

Leave the vehicle in a low gear.

Remove the battery.

Disconnect the radiator.

Before inspecting under a vehicle's hood, make sure the parking brake is engaged and/or the wheels are properly chocked.

5 . You should always be able to stop within:

10 feet of your vehicle.

1,000 feet of your vehicle.

Your view of the road ahead.

30 seconds of hitting the brakes.

You should always make sure that your vehicle will be able to stop within the area of the road that you are able to see. This means that you must slow down whenever conditions reduce visibility.

6 . How much water needs to be on the surface of a road for a vehicle to hydroplane?

Usually several inches

A good amount, such as a large puddle

A small amount

None

Hydroplaning is an effect in which a vehicle's tires lose traction with the surface of the road and instead glide along a layer of water. There does not have to be much water on the road for this to occur.

7 . If brakes fail on a long downgrade, the driver should:

Turn the vehicle off and then back on to reset the brakes.

Pump the brakes.

Look for an escape ramp or other way to stop.

If your brakes fail on a downgrade, your best option is to use an escape ramp. If no escape ramp is available, it is a good idea to look for a different escape route, such as a side road or open field.

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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.