Double Triple Test | South Carolina 2026 #1

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 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 may vary from state to state.

Number of Question 20

Passing Score 16

Number of Tests 20

1 . If you are not sure if there is enough space for your vehicle to safely pass under a bridge, you should:

Speed up.

Swerve as you pass under the bridge.

Slow down.

Drive on the shoulder.

If you are not sure that you have enough room to safely fit underneath a bridge or other overhead object, you should slow down and seek an alternate route, if possible.

2 . Stopping distance can be affected by:

Speed.

Engine oil.

Time of day.

Traffic.

Factors that can affect stopping distance include your vehicle's speed, its weight, and the traction provided by the road surface.

3 . 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.

4 . To help your vehicle be seen by others:

Your headlights should be clean.

Your headlights should be turned off during the day.

Your headlights should be covered with grease.

Your headlights should be used, but only in the rain.

A vehicle's headlights should be clean during trips. This will ensure that the lights can provide as much light as possible, helping the vehicle to be seen.

5 . Air tank drains:

Allow rain water to enter air tanks.

Are used to drain water and oil from air tanks.

Should never be opened.

Must remain open while driving.

In an air brake system, the air tanks are equipped with drains that allow water and compressor oil to be removed from the system. If allowed to build up, water and compressor oil can damage an air brake system.

6 . 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.

7 . If your vehicle is hydroplaning, you should:

Use the accelerator.

Not use the brakes.

Put the vehicle in a higher gear.

If your vehicle begins to hydroplane, do not apply the brakes. Instead, slow down by releasing the accelerator and pushing in the clutch.

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2026 South Carolina | Frequently Asked Questions

To secure a CDL Bus endorsement in South Carolina, you must first have a Commercial Driver's License (CDL). Next, pass the passenger endorsement written test and then complete a skills test in the type of vehicle you'll be driving. You may also need to undergo a background check and meet physical health requirements.

To obtain a CDL Bus license in South Carolina, you need a valid driver's license, be at least 21 years old, and pass a vision exam. You must also pass written knowledge tests for the CDL and passenger endorsement, complete a CDL training course, and pass a skills test in a passenger vehicle. A medical examination is also required.

Yes, specific training is necessary for a CDL Bus endorsement in South Carolina. You must complete a CDL training course that includes both classroom instruction and behind-the-wheel training. Furthermore, you must pass a written knowledge test and a skills test in a passenger vehicle. No specific experience is required, but practice driving is highly recommended.

CDL Bus licenses in South Carolina fall under Class B or Class C. Class B is for vehicles designed to carry 24 passengers or more, including the driver. Class C is for vehicles designed to carry 16 to 23 passengers, including the driver. Both require a passenger (P) endorsement. A school bus (S) endorsement may also be required for certain jobs.

No, you cannot use your personal vehicle for the CDL Bus driving test in South Carolina. The vehicle used for the test must match the class and type of vehicle you plan to drive with your CDL. Therefore, you must use a commercial bus for the test if you're seeking a bus endorsement.

During the CDL Bus driving test in South Carolina, you'll be evaluated on several skills. These include pre-trip vehicle inspection, basic vehicle control (backing, turning, stopping), and on-road driving (lane changes, traffic signals, intersections). You'll also be tested on specific bus maneuvers like loading/unloading passengers, railroad crossing procedures, and emergency exit procedures.

Yes, in South Carolina, a Department of Transportation (DOT) physical examination is required for a CDL Bus endorsement. This ensures that you are physically capable of safely driving a commercial vehicle. The exam assesses vision, hearing, blood pressure, and checks for conditions like diabetes or heart disease that could impact your ability to drive safely.

No, it's not permissible to transport passengers without a valid CDL Bus endorsement in South Carolina. The endorsement is a legal requirement that ensures the driver has the necessary skills and knowledge to safely operate a passenger vehicle. Driving without it can lead to serious penalties, including fines and suspension of your commercial driving privileges.

In South Carolina, you can add a CDL Bus endorsement to your existing commercial driver's license. You'll need to pass the Passenger Transport Test and a skills test in a passenger vehicle. However, you don't need to apply for a new license altogether. Remember, the endorsement is added to your current CDL after you meet all requirements.

Yes, there are restrictions for drivers with a CDL Bus endorsement in South Carolina. Drivers are required to obey all traffic laws, maintain a clean driving record, and pass regular physical exams. Additionally, they cannot drive a bus under the influence of alcohol or drugs. Violations can lead to fines, loss of endorsement, or even loss of the entire CDL.