Knowledge Test Class B #1
Class B Driving Test | South Carolina 2026 #1
Train for FREE online with our South Carolina class B license 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 CDL class B permit 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 CDL class B requirements may vary from state to state.
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1 . On any upgrade, gravity will:
Cause your vehicle to swerve to the left.
When driving uphill, you are fighting the force of gravity, which will slow down your vehicle.
2 . You should maintain at least ____ of following distance per every 10 feet of your vehicle when you are traveling more slowly than 40 mph.
At speeds below 40 mph, you should allow at least one second of following distance for every 10 feet of your vehicle. Follow the same formula when traveling at faster speeds, then add one additional second to your following distance. Remember that larger vehicles require more space to stop than smaller vehicles.
3 . Which of the following is not a type of retarder?
Retarders are mechanisms in some vehicles that help slow the vehicle and reduce the need for braking. The four basic types of retarders are exhaust, engine, hydraulic, and electric.
4 . If hydraulic brakes fail, a driver can reduce their speed by:
Letting the truck run out of gas.
If your hydraulic bakes fail, shifting into a lower gear can help slow your vehicle down.
5 . How long is a CDL valid?
Five years
In South Carolina, CDLs are valid for five years from the date of issuance.
6 . In a leaf spring:
When inspecting your vehicle's suspension, verify that leaf springs do not have missing or broken leaves. If at least one-fourth of the leaves in a leaf spring are missing, the vehicle will be put out-of-service until the defect is fixed.
7 . How many daily hours of sleep does an adult need to maintain alertness?
Being properly rested is essential to the safe operation of a CMV. To maintain alertness, most people need eight to nine hours of sleep per night.
See the exact questions that will be on the 2026 South Carolina DMV exam.
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Lillian MCcranie explains how our CDL study guide was helpful in passing the exam and recommends it to everyone.
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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.
