Knowledge Test Class B
This license is required for driving a single vehicle with a GVWR of more than 26,001 pounds, and a trailer not to exceed 10,000 pounds gross vehicle weight rating, or a vehicle designed to transport 24 or more people (including the driver). To receive this license, applicants must pass a 50-question test. To pass, applicants must answer 40 questions correctly. Each question has two, three or four possible answer choices. Test questions come from the South Carolina Commercial Driver License Manual. Questions come from chapters covering: Introduction, Driving Safely, Transporting Cargo Safely, Air Brakes (if applicable), Pre-Trip Vehicle Inspection Test, Basic Vehicle Control Skills Test and On-Road Driving.. Endorsements that may be used with a Class B CDL are: Hazardous materials, Tank, Passenger, HazMat and Tank, Air Brakes and School bus.
Number of Question
Passing Score
8. What happens if the air pressure in a system's air tanks falls below 60 psi?
Explanation
In an air brake system, a low pressure warning signal should activate if the pressure in the air tanks falls to a level below 60 psi. This signal may be in the form of a warning light or a wig wag.
9. Antifreeze helps to keep an engine functioning properly:
Explanation
It is always important to have enough water and antifreeze in a vehicle's cooling system. Despite the name, antifreeze is beneficial to an engine even in hot weather.
10. Which of the following is not a warning sign of fatigue?
Explanation
Potential warning signs of fatigue include difficulty focusing, frequent blinking, or heavy eyelids; yawning repeatedly or rubbing your eyes; daydreaming; wandering or disconnected thoughts; trouble remembering the last few miles you've driven; missing exits or traffic signs; having trouble keeping your head up; drifting from your lane; following too closely; hitting a shoulder rumble strip; or feeling restless and irritable.
11. If a speed limit is posted, the posted speed:
Explanation
A maximum posted speed limit is the fastest a vehicle may travel under ideal circumstances. A driver should decrease their driving speed as conditions require. A driver should never exceed the legal speed limit.
12. Anti-Lock Braking Systems (ABS):
Explanation
An Anti-Lock Braking System (ABS) helps prevent wheels from locking up during a hard application of brakes.
13. When the spring brakes are on, you should never:
Explanation
Never push down the brake pedal while the spring brakes are activated. The combined force of springs and air pressure could damage the brakes.
14. Most heavy-duty vehicles use:
Explanation
Most heavy-duty vehicles use dual air brake systems, in which there are two separate braking systems operated by a single set of controls. Each system operates the brakes on different axles.
See the exact questions that will be on the 2024 South Carolina DMV exam.
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Frequently Asked Questions
A Class B Commercial Driver's License (CDL) in South Carolina allows the holder to operate a single vehicle with a weight of 26,001 pounds or more, or a combination of vehicles weighing less than 26,001 pounds. This type of license is required for drivers operating buses, delivery trucks, and other heavy vehicles that do not have a trailer.
Here are the steps to obtain a Class B CDL license in South Carolina:
1. Obtain a South Carolina Commercial Learner's Permit (CLP) by passing the required knowledge tests for the Class B CDL.
2. Hold the CLP for at least 14 days before taking the skills test.
3. Schedule and pass the skills test, which includes a pre-trip inspection, basic vehicle control, and a road test.
4. Submit all required documentation and pay the necessary fees to obtain the Class B CDL license from the South Carolina Department of Motor Vehicles (DMV).
5. Maintain your CDL by complying with all state and federal regulations, including regular medical exams and continuing education requirements.
Here are the steps to obtain a Class B CDL license in South Carolina:
1. Obtain a South Carolina Commercial Learner's Permit (CLP) by passing the required knowledge tests for the Class B CDL.
2. Hold the CLP for at least 14 days before taking the skills test.
3. Schedule and pass the skills test, which includes a pre-trip inspection, basic vehicle control, and a road test.
4. Submit all required documentation and pay the necessary fees to obtain the Class B CDL license from the South Carolina Department of Motor Vehicles (DMV).
5. Maintain your CDL by complying with all state and federal regulations, including regular medical exams and continuing education requirements.
With a Class B Commercial Driver's License (CDL) in South Carolina, you can operate a single vehicle with a weight of 26,001 pounds or more, or a combination of vehicles with a combined weight of less than 26,001 pounds. Here are some examples of vehicles you can operate with a Class B CDL:
- Straight trucks (e.g. delivery trucks, dump trucks)
- Buses (e.g. city buses, school buses)
- Box trucks with trailers under 10,000 pounds
- Tow trucks with trailers under 10,000 pounds
- Segmented buses
- Large passenger vans (e.g. airport shuttles)
It's important to note that certain endorsements or restrictions may apply depending on the specific type of vehicle you plan to operate. For example, if you plan to operate a bus with air brakes, you will need an air brake endorsement on your CDL.
- Straight trucks (e.g. delivery trucks, dump trucks)
- Buses (e.g. city buses, school buses)
- Box trucks with trailers under 10,000 pounds
- Tow trucks with trailers under 10,000 pounds
- Segmented buses
- Large passenger vans (e.g. airport shuttles)
It's important to note that certain endorsements or restrictions may apply depending on the specific type of vehicle you plan to operate. For example, if you plan to operate a bus with air brakes, you will need an air brake endorsement on your CDL.
To obtain a Class B Commercial Driver's License (CDL) in South Carolina, you must meet the following requirements:
1. Be at least 18 years old (21 years old for interstate driving).
2. Hold a valid South Carolina driver's license.
3. Provide proof of U.S. citizenship or lawful permanent residency.
4. Obtain a South Carolina Commercial Learner's Permit (CLP) by passing the required knowledge tests for the Class B CDL.
5. Hold the CLP for at least 14 days before taking the skills test.
6. Pass a skills test, which includes a pre-trip inspection, basic vehicle control, and a road test.
7. Self-certify your type of driving (interstate or intrastate) and submit a medical examiner's certificate if required.
8. Submit all required documentation and pay the necessary fees to obtain the Class B CDL license from the South Carolina Department of Motor Vehicles (DMV).
It's important to note that there may be additional requirements depending on your specific situation and the type of vehicle you plan to operate. You should consult with the DMV or a qualified CDL training program for more information on obtaining a Class B CDL in South Carolina.
1. Be at least 18 years old (21 years old for interstate driving).
2. Hold a valid South Carolina driver's license.
3. Provide proof of U.S. citizenship or lawful permanent residency.
4. Obtain a South Carolina Commercial Learner's Permit (CLP) by passing the required knowledge tests for the Class B CDL.
5. Hold the CLP for at least 14 days before taking the skills test.
6. Pass a skills test, which includes a pre-trip inspection, basic vehicle control, and a road test.
7. Self-certify your type of driving (interstate or intrastate) and submit a medical examiner's certificate if required.
8. Submit all required documentation and pay the necessary fees to obtain the Class B CDL license from the South Carolina Department of Motor Vehicles (DMV).
It's important to note that there may be additional requirements depending on your specific situation and the type of vehicle you plan to operate. You should consult with the DMV or a qualified CDL training program for more information on obtaining a Class B CDL in South Carolina.
In South Carolina, the minimum age requirement for a Class B Commercial Driver's License (CDL) is 18 years old for intrastate driving within the state. However, if you plan to operate a commercial vehicle across state lines, you must be at least 21 years old to obtain a CDL.
It's important to note that some employers may have their own minimum age requirements for hiring CDL drivers, which may be higher than the state requirement. Additionally, certain endorsements or restrictions on your CDL may also have their own age requirements. It's always a good idea to check with the South Carolina Department of Motor Vehicles or a qualified CDL training program for more information on age requirements for obtaining a Class B CDL license.
It's important to note that some employers may have their own minimum age requirements for hiring CDL drivers, which may be higher than the state requirement. Additionally, certain endorsements or restrictions on your CDL may also have their own age requirements. It's always a good idea to check with the South Carolina Department of Motor Vehicles or a qualified CDL training program for more information on age requirements for obtaining a Class B CDL license.
In South Carolina, some endorsements may be required to operate certain types of vehicles with a Class B Commercial Driver's License (CDL). The following are some of the most common endorsements for Class B CDL holders:
1. Passenger (P) endorsement: This endorsement is required for drivers who operate a vehicle designed to transport 16 or more passengers, including the driver.
2. School Bus (S) endorsement: This endorsement is required for drivers who operate a school bus.
3. Hazardous Materials (H) endorsement: This endorsement is required for drivers who transport hazardous materials in quantities that require placarding.
4. Tank Vehicle (N) endorsement: This endorsement is required for drivers who operate a vehicle designed to transport liquid or gaseous materials in bulk.
5. Doubles/Triples (T) endorsement: This endorsement is required for drivers who operate a combination of two or three trailers.
It's important to note that additional endorsements may be required depending on the type of vehicle you plan to operate. You should consult with the South Carolina Department of Motor Vehicles or a qualified CDL training program for more information on endorsements for a Class B CDL license.
1. Passenger (P) endorsement: This endorsement is required for drivers who operate a vehicle designed to transport 16 or more passengers, including the driver.
2. School Bus (S) endorsement: This endorsement is required for drivers who operate a school bus.
3. Hazardous Materials (H) endorsement: This endorsement is required for drivers who transport hazardous materials in quantities that require placarding.
4. Tank Vehicle (N) endorsement: This endorsement is required for drivers who operate a vehicle designed to transport liquid or gaseous materials in bulk.
5. Doubles/Triples (T) endorsement: This endorsement is required for drivers who operate a combination of two or three trailers.
It's important to note that additional endorsements may be required depending on the type of vehicle you plan to operate. You should consult with the South Carolina Department of Motor Vehicles or a qualified CDL training program for more information on endorsements for a Class B CDL license.
The Class B Commercial Driver's License (CDL) skills test in South Carolina consists of three parts:
1. Pre-trip Inspection: You will be tested on your ability to inspect the vehicle for safety hazards before you start driving. You will need to identify and explain the inspection points of the vehicle, including brakes, steering, lights, tires, and more.
2. Basic Vehicle Control: You will be tested on your ability to control the vehicle in various situations, such as driving forward and backward, turning, shifting gears, stopping and starting on a hill, and more.
3. Road Test: You will be tested on your ability to safely operate the vehicle in traffic. The examiner will evaluate your ability to perform tasks such as lane changes, turns, merging into traffic, stopping at intersections, and more.
During the skills test, you'll be required to demonstrate your ability to follow all traffic laws and safety rules while operating a Class B vehicle. It is important to note that the skills test must be completed with a vehicle that is representative of the type of vehicle you plan to operate with your CDL.
It's always a good idea to prepare for the skills test by studying the South Carolina Commercial Driver's License Manual and practicing with a qualified CDL training program or instructor.
1. Pre-trip Inspection: You will be tested on your ability to inspect the vehicle for safety hazards before you start driving. You will need to identify and explain the inspection points of the vehicle, including brakes, steering, lights, tires, and more.
2. Basic Vehicle Control: You will be tested on your ability to control the vehicle in various situations, such as driving forward and backward, turning, shifting gears, stopping and starting on a hill, and more.
3. Road Test: You will be tested on your ability to safely operate the vehicle in traffic. The examiner will evaluate your ability to perform tasks such as lane changes, turns, merging into traffic, stopping at intersections, and more.
During the skills test, you'll be required to demonstrate your ability to follow all traffic laws and safety rules while operating a Class B vehicle. It is important to note that the skills test must be completed with a vehicle that is representative of the type of vehicle you plan to operate with your CDL.
It's always a good idea to prepare for the skills test by studying the South Carolina Commercial Driver's License Manual and practicing with a qualified CDL training program or instructor.
Yes, there are some restrictions and limitations for drivers with a Class B Commercial Driver's License (CDL) in South Carolina. Some of the most common restrictions include:
1. Vehicle Type: With a Class B CDL, you are authorized to operate a single vehicle with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or a combination of vehicles with a GCWR of less than 26,001 pounds.
2. Passenger Endorsement: If you do not have a Passenger (P) endorsement on your CDL, you are not authorized to transport more than 15 passengers, including the driver.
3. Hazardous Materials Endorsement: If you do not have a Hazardous Materials (H) endorsement on your CDL, you are not authorized to transport hazardous materials in quantities that require placarding.
4. Air Brake Restriction: If you took your skills test in a vehicle without air brakes, you will have an air brake restriction on your CDL and will not be authorized to operate a vehicle with air brakes.
5. Automatic Transmission Restriction: If you took your skills test in a vehicle with an automatic transmission, you will have an automatic transmission restriction on your CDL and will not be authorized to operate a vehicle with a manual transmission.
It's important to note that there may be additional restrictions or limitations depending on the type of endorsement(s) you hold and the type of vehicle(s) you plan to operate. You should consult with the South Carolina Department of Motor Vehicles or a qualified CDL training program for more information on Class B CDL restrictions and limitations.
1. Vehicle Type: With a Class B CDL, you are authorized to operate a single vehicle with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or a combination of vehicles with a GCWR of less than 26,001 pounds.
2. Passenger Endorsement: If you do not have a Passenger (P) endorsement on your CDL, you are not authorized to transport more than 15 passengers, including the driver.
3. Hazardous Materials Endorsement: If you do not have a Hazardous Materials (H) endorsement on your CDL, you are not authorized to transport hazardous materials in quantities that require placarding.
4. Air Brake Restriction: If you took your skills test in a vehicle without air brakes, you will have an air brake restriction on your CDL and will not be authorized to operate a vehicle with air brakes.
5. Automatic Transmission Restriction: If you took your skills test in a vehicle with an automatic transmission, you will have an automatic transmission restriction on your CDL and will not be authorized to operate a vehicle with a manual transmission.
It's important to note that there may be additional restrictions or limitations depending on the type of endorsement(s) you hold and the type of vehicle(s) you plan to operate. You should consult with the South Carolina Department of Motor Vehicles or a qualified CDL training program for more information on Class B CDL restrictions and limitations.
No, in South Carolina, the Class B Commercial Driver's License (CDL) written test can only be taken in English. The state requires that all CDL applicants must be able to read and understand English well enough to take the written test and communicate with law enforcement officers on the road. This is because all road signs, signals, and instructions are in English.
However, the South Carolina Department of Motor Vehicles (DMV) does provide an audio version of the CDL manual in Spanish for non-English speakers to assist with studying for the test. Additionally, if you need an interpreter for any part of the CDL exam process, you are responsible for providing your own interpreter at your expense. The interpreter must be fluent in both English and your native language and must not be a family member or friend.
However, the South Carolina Department of Motor Vehicles (DMV) does provide an audio version of the CDL manual in Spanish for non-English speakers to assist with studying for the test. Additionally, if you need an interpreter for any part of the CDL exam process, you are responsible for providing your own interpreter at your expense. The interpreter must be fluent in both English and your native language and must not be a family member or friend.
Yes, in South Carolina, you can request reasonable accommodations for the Class B Commercial Driver's License (CDL) written test if you have a disability that may affect your ability to take the test.
To request accommodations, you must complete and submit an Application for Reasonable Accommodations (Form MV-95) to the South Carolina Department of Motor Vehicles (DMV). The form must be signed by a licensed healthcare professional who can verify your disability and explain how it affects your ability to take the test.
Some examples of accommodations that may be provided include extra time to complete the test, a private testing room, a reader or scribe, or a sign language interpreter. The DMV will review your application and determine what accommodations are appropriate based on your specific needs and the nature of the test.
It's important to note that you must submit your application for reasonable accommodations at least 30 days before you plan to take the CDL written test. This will give the DMV enough time to review your request and make any necessary arrangements.
To request accommodations, you must complete and submit an Application for Reasonable Accommodations (Form MV-95) to the South Carolina Department of Motor Vehicles (DMV). The form must be signed by a licensed healthcare professional who can verify your disability and explain how it affects your ability to take the test.
Some examples of accommodations that may be provided include extra time to complete the test, a private testing room, a reader or scribe, or a sign language interpreter. The DMV will review your application and determine what accommodations are appropriate based on your specific needs and the nature of the test.
It's important to note that you must submit your application for reasonable accommodations at least 30 days before you plan to take the CDL written test. This will give the DMV enough time to review your request and make any necessary arrangements.
Yes, if you fail the Class B Commercial Driver's License (CDL) written test in South Carolina, you can retake the test. However, you must wait at least one day before taking the test again.
If you fail the test three times, you will need to wait at least 14 days before taking the test again. If you fail the test seven times, you will need to wait at least 30 days before taking the test again.
It's important to note that each time you retake the CDL written test, you will need to pay a fee. The fee for each retake is $2.50.
To improve your chances of passing the CDL written test, it's important to study the South Carolina CDL Manual thoroughly and take practice tests. The manual covers all of the information that you will be tested on, including driving laws and regulations, vehicle inspection procedures, and safe driving practices. You can also take advantage of online resources and CDL training programs to help you prepare for the test.
If you fail the test three times, you will need to wait at least 14 days before taking the test again. If you fail the test seven times, you will need to wait at least 30 days before taking the test again.
It's important to note that each time you retake the CDL written test, you will need to pay a fee. The fee for each retake is $2.50.
To improve your chances of passing the CDL written test, it's important to study the South Carolina CDL Manual thoroughly and take practice tests. The manual covers all of the information that you will be tested on, including driving laws and regulations, vehicle inspection procedures, and safe driving practices. You can also take advantage of online resources and CDL training programs to help you prepare for the test.
