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.
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Frequently Asked Questions
A Class B CDL license in South Carolina is a commercial driver's license that allows the driver to operate a single vehicle with a GVWR (Gross Vehicle Weight Rating) of 26,001 pounds or more, or a combination of vehicles with a GCWR (Gross Combination Weight Rating) of less than 26,001 pounds. This type of license is required for drivers who operate buses, delivery trucks, dump trucks, and other heavy vehicles.
To obtain a Class B CDL license in South Carolina, follow these steps:
1. Obtain a South Carolina Commercial Learner's Permit (CLP) by passing the appropriate knowledge tests and meeting the requirements for age, residency, and medical certification.
2. Practice driving with the CLP for at least 14 days.
3. Schedule and pass a skills test with a certified examiner. The skills test will consist of three parts: pre-trip inspection, basic vehicle control, and road test.
4. Submit the necessary forms and fees to the South Carolina Department of Motor Vehicles (DMV).
5. Receive your Class B CDL license from the DMV.
It is important to note that additional endorsements may be required depending on the specific type of vehicle being operated (e.g., passenger endorsement for buses).
To obtain a Class B CDL license in South Carolina, follow these steps:
1. Obtain a South Carolina Commercial Learner's Permit (CLP) by passing the appropriate knowledge tests and meeting the requirements for age, residency, and medical certification.
2. Practice driving with the CLP for at least 14 days.
3. Schedule and pass a skills test with a certified examiner. The skills test will consist of three parts: pre-trip inspection, basic vehicle control, and road test.
4. Submit the necessary forms and fees to the South Carolina Department of Motor Vehicles (DMV).
5. Receive your Class B CDL license from the DMV.
It is important to note that additional endorsements may be required depending on the specific type of vehicle being operated (e.g., passenger endorsement for buses).
With a Class B CDL license in South Carolina, you are authorized to operate a single vehicle with a GVWR (Gross Vehicle Weight Rating) of 26,001 pounds or more, or a combination of vehicles with a GCWR (Gross Combination Weight Rating) of less than 26,001 pounds. This can include:
- Straight trucks (such as delivery trucks)
- Large buses (such as school buses)
- Dump trucks with small trailers
- Box trucks with attached trailers
- Tow trucks with small trailers
It is important to note that additional endorsements may be required to operate certain types of vehicles, such as those carrying hazardous materials or passengers.
- Straight trucks (such as delivery trucks)
- Large buses (such as school buses)
- Dump trucks with small trailers
- Box trucks with attached trailers
- Tow trucks with small trailers
It is important to note that additional endorsements may be required to operate certain types of vehicles, such as those carrying hazardous materials or passengers.
To obtain a Class B CDL license in South Carolina, you must meet the following requirements:
1. Age: You must be at least 18 years old to drive within the state of South Carolina and at least 21 years old to drive interstate.
2. Residency: You must be a resident of South Carolina or have a valid South Carolina address on your driver's license.
3. Medical certification: You must pass a medical examination and obtain a medical certificate from a certified medical examiner.
4. Commercial Learner's Permit (CLP): You must first obtain a CLP by passing the appropriate knowledge tests for the type of vehicle you wish to operate. The CLP allows you to practice driving with a qualified CDL holder in the vehicle with you.
5. Skills test: You must pass a skills test consisting of three parts: pre-trip inspection, basic vehicle control, and road test, with a certified examiner.
6. Knowledge tests: You may be required to pass additional knowledge tests and obtain endorsements depending on the specific type of vehicle you wish to operate (e.g., passenger endorsement for buses).
7. Clean driving record: You must have a clean driving record with no serious traffic violations or DUI convictions.
8. Background check: You may be required to undergo a background check depending on the type of endorsement you are seeking.
It is important to note that these requirements may vary depending on your specific situation and the type of vehicle you wish to operate with your Class B CDL license.
1. Age: You must be at least 18 years old to drive within the state of South Carolina and at least 21 years old to drive interstate.
2. Residency: You must be a resident of South Carolina or have a valid South Carolina address on your driver's license.
3. Medical certification: You must pass a medical examination and obtain a medical certificate from a certified medical examiner.
4. Commercial Learner's Permit (CLP): You must first obtain a CLP by passing the appropriate knowledge tests for the type of vehicle you wish to operate. The CLP allows you to practice driving with a qualified CDL holder in the vehicle with you.
5. Skills test: You must pass a skills test consisting of three parts: pre-trip inspection, basic vehicle control, and road test, with a certified examiner.
6. Knowledge tests: You may be required to pass additional knowledge tests and obtain endorsements depending on the specific type of vehicle you wish to operate (e.g., passenger endorsement for buses).
7. Clean driving record: You must have a clean driving record with no serious traffic violations or DUI convictions.
8. Background check: You may be required to undergo a background check depending on the type of endorsement you are seeking.
It is important to note that these requirements may vary depending on your specific situation and the type of vehicle you wish to operate with your Class B CDL license.
In South Carolina, the minimum age requirement for a Class B CDL license is 18 years old. However, if you plan to operate a commercial vehicle across state lines or transport hazardous materials, you must be at least 21 years old. It is important to note that certain employers or insurance companies may also have their own age requirements for drivers.
In South Carolina, you may need to obtain certain endorsements for a Class B CDL license depending on the type of vehicle you plan to operate and the cargo you will carry. Some of the common endorsements for a Class B CDL license include:
1. Passenger endorsement (P) - required for drivers of vehicles designed to transport 16 or more passengers, including the driver.
2. School bus endorsement (S) - required for drivers of school buses.
3. Tanker endorsement (N) - required for drivers transporting liquid or gaseous materials in tanks.
4. Hazardous materials endorsement (H) - required for drivers transporting hazardous materials in amounts that require placards.
To obtain these endorsements, you will need to pass additional knowledge tests and meet other requirements, such as background checks and fingerprinting. It is important to note that some employers may require additional endorsements beyond those required by the state.
1. Passenger endorsement (P) - required for drivers of vehicles designed to transport 16 or more passengers, including the driver.
2. School bus endorsement (S) - required for drivers of school buses.
3. Tanker endorsement (N) - required for drivers transporting liquid or gaseous materials in tanks.
4. Hazardous materials endorsement (H) - required for drivers transporting hazardous materials in amounts that require placards.
To obtain these endorsements, you will need to pass additional knowledge tests and meet other requirements, such as background checks and fingerprinting. It is important to note that some employers may require additional endorsements beyond those required by the state.
The Class B CDL skills test in South Carolina consists of three parts: the pre-trip inspection, basic vehicle control, and on-road driving test. Here is a brief overview of each part:
1. Pre-trip inspection: In this part of the test, you will be asked to inspect your vehicle to make sure it is safe to operate. You will need to identify and explain the function of various parts of the vehicle, including the brakes, steering, lights, and tires.
2. Basic vehicle control: In this part of the test, you will be asked to demonstrate your ability to control the vehicle in various situations. This may involve tasks such as backing up, turning, and parking.
3. On-road driving: In this part of the test, you will be asked to drive the vehicle on public roads while following directions from the examiner. You will need to demonstrate your ability to safely operate the vehicle in traffic and obey all traffic laws.
During the skills test, you will be evaluated on your ability to perform each task safely and correctly. It is important to practice and prepare for each part of the test to increase your chances of passing.
1. Pre-trip inspection: In this part of the test, you will be asked to inspect your vehicle to make sure it is safe to operate. You will need to identify and explain the function of various parts of the vehicle, including the brakes, steering, lights, and tires.
2. Basic vehicle control: In this part of the test, you will be asked to demonstrate your ability to control the vehicle in various situations. This may involve tasks such as backing up, turning, and parking.
3. On-road driving: In this part of the test, you will be asked to drive the vehicle on public roads while following directions from the examiner. You will need to demonstrate your ability to safely operate the vehicle in traffic and obey all traffic laws.
During the skills test, you will be evaluated on your ability to perform each task safely and correctly. It is important to practice and prepare for each part of the test to increase your chances of passing.
Yes, there are certain restrictions and limitations for drivers with a Class B CDL license in South Carolina. Here are some important ones to be aware of:
1. Passenger restrictions: If you have a Class B CDL with a passenger endorsement (P), you are not permitted to operate a vehicle designed to transport more than 16 passengers, including the driver.
2. Trailer restrictions: If you have a Class B CDL, you are not permitted to tow more than one vehicle and the combined weight of the vehicles cannot exceed 10,000 pounds.
3. Hazardous materials restrictions: If you have a Class B CDL with a hazardous materials endorsement (H), you must comply with all federal and state regulations related to the transportation of hazardous materials.
4. Age restrictions: To obtain a Class B CDL in South Carolina, you must be at least 18 years old. However, if you plan to operate a commercial vehicle across state lines or transport hazardous materials, you must be at least 21 years old.
It is important to be aware of these restrictions and limitations as they can impact your ability to operate certain types of vehicles or transport certain types of cargo.
1. Passenger restrictions: If you have a Class B CDL with a passenger endorsement (P), you are not permitted to operate a vehicle designed to transport more than 16 passengers, including the driver.
2. Trailer restrictions: If you have a Class B CDL, you are not permitted to tow more than one vehicle and the combined weight of the vehicles cannot exceed 10,000 pounds.
3. Hazardous materials restrictions: If you have a Class B CDL with a hazardous materials endorsement (H), you must comply with all federal and state regulations related to the transportation of hazardous materials.
4. Age restrictions: To obtain a Class B CDL in South Carolina, you must be at least 18 years old. However, if you plan to operate a commercial vehicle across state lines or transport hazardous materials, you must be at least 21 years old.
It is important to be aware of these restrictions and limitations as they can impact your ability to operate certain types of vehicles or transport certain types of cargo.
In South Carolina, the Class B CDL written test is only offered in English. However, if you have difficulty reading or understanding English, you may request an oral exam in which a DMV representative will read the questions to you and record your answers. The oral exam is available in Spanish, but you must bring your own interpreter if you need the exam in another language.
It is important to note that you will still need to be able to read and understand English for other aspects of the CDL testing process, such as the pre-trip inspection and on-road driving test. If you are not comfortable with English, it may be helpful to take a CDL preparation course or seek out other resources to help you prepare for the exam and improve your language skills.
It is important to note that you will still need to be able to read and understand English for other aspects of the CDL testing process, such as the pre-trip inspection and on-road driving test. If you are not comfortable with English, it may be helpful to take a CDL preparation course or seek out other resources to help you prepare for the exam and improve your language skills.
Yes, if you have a disability that affects your ability to take the Class B CDL written test in its standard format, you may be eligible for accommodations. The South Carolina Department of Motor Vehicles (DMV) provides reasonable accommodations for individuals with disabilities, in compliance with the Americans with Disabilities Act (ADA).
To request accommodations, you must fill out a Request for Accommodations for Persons with Disabilities (Form MV-94) and submit it to the DMV at least 30 days before your scheduled test date. The form requires you to provide information about your disability and the specific accommodations you are requesting.
The DMV will review your request and determine if the requested accommodations can be provided. Examples of accommodations that may be provided include extra testing time, a reader or scribe, or a private testing room.
It is important to note that you must still meet all other eligibility requirements for obtaining a Class B CDL license, regardless of any accommodations provided for the written test.
To request accommodations, you must fill out a Request for Accommodations for Persons with Disabilities (Form MV-94) and submit it to the DMV at least 30 days before your scheduled test date. The form requires you to provide information about your disability and the specific accommodations you are requesting.
The DMV will review your request and determine if the requested accommodations can be provided. Examples of accommodations that may be provided include extra testing time, a reader or scribe, or a private testing room.
It is important to note that you must still meet all other eligibility requirements for obtaining a Class B CDL license, regardless of any accommodations provided for the written test.
If you fail the Class B CDL written test in South Carolina, you are allowed to retake the test. However, there are some restrictions on how soon you can retake the test.
If you fail the test, you will be required to wait at least one day before retaking it. If you fail the test three times, you will be required to wait at least seven days before retaking it again. If you fail the test four or more times, you will be required to wait at least 14 days before retaking it.
It is important to note that each time you retake the test, you will be required to pay the testing fee again. Therefore, it is in your best interest to prepare thoroughly for the test and only take it when you feel fully ready.
Additionally, if you fail the written test three or more times, it may be a sign that you need additional training or study materials. Consider seeking out a CDL preparation course or other resources to help improve your knowledge and skills before attempting the test again.
If you fail the test, you will be required to wait at least one day before retaking it. If you fail the test three times, you will be required to wait at least seven days before retaking it again. If you fail the test four or more times, you will be required to wait at least 14 days before retaking it.
It is important to note that each time you retake the test, you will be required to pay the testing fee again. Therefore, it is in your best interest to prepare thoroughly for the test and only take it when you feel fully ready.
Additionally, if you fail the written test three or more times, it may be a sign that you need additional training or study materials. Consider seeking out a CDL preparation course or other resources to help improve your knowledge and skills before attempting the test again.
