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 four possible answer choices. Test questions come from the Washington D.C. 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. Air tank drains:
Explanation
Compressed air in an air brake system usually contains a certain amount of water and compressor oil. The water and oil can damage the brakes if left to accumulate in the system. Manually operated air tank drains must be opened daily to remove this build-up.
9. Once cargo is secured:
Explanation
The securement of cargo must be checked before beginning a trip, within the first 50 miles of a trip, and then again every three hours or 150 miles.
10. When carrying a wide load, you should:
Explanation
Loads that are over-length, over-width, and/or overweight may require special permits. Drivers of such loads may be subject to special restrictions, such as only being permitted to drive at certain times.
11. In very hot weather, tires should be checked regularly because:
Explanation
Air expands as it gets warmer, so the air pressure in your tires could reach dangerously high levels while being used in very hot weather. If this happens, stop and let your tires cool. Do not let air out of the tires, as this could result in the pressure dropping to an unsafe level once the tires cool down.
12. A tank endorsement is:
Explanation
Subject to certain conditions, a tank endorsement is required to operate a tank vehicle that is used to haul either liquids or gases.
13. When driving down a steep grade:
Explanation
When driving down a steep grade, you should rely primarily on the braking effect of the engine to slow down. To prevent overheating, use your brakes only as a supplement to this slowing technique.
14. Roads are most slippery right after it begins to rain because:
Explanation
Roads are particularly slippery when it first begins to rain. The water mixes with oil drippings on the road that have not yet washed away, creating a slippery and dangerous mixture.
Frequently Asked Questions
In the District of Columbia, a Class B Commercial Driver's License (CDL) allows drivers to operate a single vehicle with a gross vehicle weight rating (GVWR) of 26,001 pounds or more. This may include vehicles such as buses, tow trucks, dump trucks, and delivery trucks.
To obtain a Class B CDL in DC, follow these steps:
1. Obtain a Commercial Learner’s Permit (CLP) by passing the knowledge test for a Class B CDL.
2. Hold the CLP for at least 14 days before taking the skills test.
3. Schedule and pass the skills test at a DC DMV testing location. The skills test includes a pre-trip vehicle inspection, basic vehicle control, and on-road driving.
4. Provide proof of identity, residency, and Social Security number.
5. Pay the required fees.
It is important to note that additional endorsements may be required to operate certain types of vehicles or carry certain types of cargo. For example, a passenger endorsement is needed to operate a bus with passengers.
To obtain a Class B CDL in DC, follow these steps:
1. Obtain a Commercial Learner’s Permit (CLP) by passing the knowledge test for a Class B CDL.
2. Hold the CLP for at least 14 days before taking the skills test.
3. Schedule and pass the skills test at a DC DMV testing location. The skills test includes a pre-trip vehicle inspection, basic vehicle control, and on-road driving.
4. Provide proof of identity, residency, and Social Security number.
5. Pay the required fees.
It is important to note that additional endorsements may be required to operate certain types of vehicles or carry certain types of cargo. For example, a passenger endorsement is needed to operate a bus with passengers.
With a Class B CDL license in the District of Columbia, you can operate a variety of single vehicles including:
1. Large buses, such as school buses or city transit buses
2. Straight trucks with a Gross Vehicle Weight Rating (GVWR) of 26,001 pounds or more, including dump trucks and delivery trucks
3. Box trucks with trailers that have a combined GVWR of less than 26,001 pounds
4. Tow trucks that weigh less than 10,000 pounds
It is important to note that additional endorsements may be required to operate certain types of vehicles or carry certain types of cargo. For example, a passenger endorsement is needed to operate a bus with passengers. Also, if you want to tow a trailer with a GVWR greater than 10,000 pounds or carry hazardous materials, additional endorsements will be required.
1. Large buses, such as school buses or city transit buses
2. Straight trucks with a Gross Vehicle Weight Rating (GVWR) of 26,001 pounds or more, including dump trucks and delivery trucks
3. Box trucks with trailers that have a combined GVWR of less than 26,001 pounds
4. Tow trucks that weigh less than 10,000 pounds
It is important to note that additional endorsements may be required to operate certain types of vehicles or carry certain types of cargo. For example, a passenger endorsement is needed to operate a bus with passengers. Also, if you want to tow a trailer with a GVWR greater than 10,000 pounds or carry hazardous materials, additional endorsements will be required.
To obtain a Class B CDL license in the District of Columbia, you must meet the following requirements:
1. Be at least 18 years of age (21 years of age to transport hazardous materials or operate a vehicle across state lines).
2. Have a valid non-commercial driver's license.
3. Provide proof of identity, residency, and Social Security number.
4. Pass a medical examination to confirm that you meet the physical requirements for a CDL license.
5. Obtain a Commercial Learner’s Permit (CLP) by passing the knowledge test for a Class B CDL.
6. Hold the CLP for at least 14 days before taking the skills test.
7. Successfully complete a skills test at a DC DMV testing location. The skills test includes a pre-trip vehicle inspection, basic vehicle control, and on-road driving.
8. Pay the required fees.
It is important to note that additional endorsements may be required to operate certain types of vehicles or carry certain types of cargo. For example, a passenger endorsement is needed to operate a bus with passengers. Also, if you want to tow a trailer with a GVWR greater than 10,000 pounds or carry hazardous materials, additional endorsements will be required.
1. Be at least 18 years of age (21 years of age to transport hazardous materials or operate a vehicle across state lines).
2. Have a valid non-commercial driver's license.
3. Provide proof of identity, residency, and Social Security number.
4. Pass a medical examination to confirm that you meet the physical requirements for a CDL license.
5. Obtain a Commercial Learner’s Permit (CLP) by passing the knowledge test for a Class B CDL.
6. Hold the CLP for at least 14 days before taking the skills test.
7. Successfully complete a skills test at a DC DMV testing location. The skills test includes a pre-trip vehicle inspection, basic vehicle control, and on-road driving.
8. Pay the required fees.
It is important to note that additional endorsements may be required to operate certain types of vehicles or carry certain types of cargo. For example, a passenger endorsement is needed to operate a bus with passengers. Also, if you want to tow a trailer with a GVWR greater than 10,000 pounds or carry hazardous materials, additional endorsements will be required.
In the District of Columbia, the minimum age requirement for obtaining a Class B CDL license is 18 years old. However, drivers who are 18 to 20 years old are restricted from operating commercial vehicles outside of the District of Columbia or transporting hazardous materials.
If you want to operate a commercial vehicle outside of the District of Columbia or transport hazardous materials, you must be at least 21 years old.
If you want to operate a commercial vehicle outside of the District of Columbia or transport hazardous materials, you must be at least 21 years old.
You may need endorsements for a Class B CDL license depending on the type of vehicle you plan to operate and the type of cargo you plan to carry. Some of the common endorsements for a Class B CDL include:
1. Passenger endorsement (P) - required to operate a bus designed to transport 16 or more passengers, including the driver.
2. School bus endorsement (S) - required to operate a school bus.
3. Tanker endorsement (N) - required to operate a vehicle that transports liquids or gases in bulk containers with a capacity of 1,000 gallons or more.
4. Hazardous materials endorsement (H) - required to transport hazardous materials in amounts that require placards on the vehicle.
You will need to pass additional knowledge and skills tests for each endorsement you seek. It is important to note that there may be additional requirements for obtaining certain endorsements, such as a background check or specialized training.
1. Passenger endorsement (P) - required to operate a bus designed to transport 16 or more passengers, including the driver.
2. School bus endorsement (S) - required to operate a school bus.
3. Tanker endorsement (N) - required to operate a vehicle that transports liquids or gases in bulk containers with a capacity of 1,000 gallons or more.
4. Hazardous materials endorsement (H) - required to transport hazardous materials in amounts that require placards on the vehicle.
You will need to pass additional knowledge and skills tests for each endorsement you seek. It is important to note that there may be additional requirements for obtaining certain endorsements, such as a background check or specialized training.
The Class B CDL skills test is a three-part test that assesses your ability to safely operate a Class B commercial vehicle. The three parts of the test are:
1. Pre-trip inspection: You will be required to perform a thorough pre-trip inspection of your vehicle, identifying any potential safety hazards or mechanical issues.
2. Basic vehicle control: You will be required to demonstrate your ability to control the vehicle in various driving situations, such as backing up, turning, and parking.
3. On-road driving: You will be required to demonstrate your ability to safely operate the vehicle in traffic, following all traffic laws and regulations.
During the skills test, you will be evaluated on your ability to perform each task safely and effectively. To pass the test, you must not accumulate more than 30 points of error across all three parts of the test. It is important to note that specific requirements for the skills test may vary depending on your state or jurisdiction.
1. Pre-trip inspection: You will be required to perform a thorough pre-trip inspection of your vehicle, identifying any potential safety hazards or mechanical issues.
2. Basic vehicle control: You will be required to demonstrate your ability to control the vehicle in various driving situations, such as backing up, turning, and parking.
3. On-road driving: You will be required to demonstrate your ability to safely operate the vehicle in traffic, following all traffic laws and regulations.
During the skills test, you will be evaluated on your ability to perform each task safely and effectively. To pass the test, you must not accumulate more than 30 points of error across all three parts of the test. It is important to note that specific requirements for the skills test may vary depending on your state or jurisdiction.
Yes, there are some restrictions and limitations for drivers with a Class B CDL license. Some of the common restrictions and limitations include:
1. Vehicle weight: Drivers with a Class B CDL may only operate a vehicle with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or a combination of vehicles with a GCWR of 26,001 pounds or more.
2. Passenger restrictions: Drivers with a Class B CDL may only transport up to 16 passengers (including the driver) in a single vehicle.
3. Hazardous materials: Drivers with a Class B CDL may transport hazardous materials in amounts that require placards on the vehicle, but only if they have also obtained the required Hazardous Materials (H) endorsement.
4. Interstate vs. intrastate: Drivers with a Class B CDL may be restricted to operating only within their state (intrastate) or may be allowed to operate across state lines (interstate), depending on their individual license and endorsement qualifications.
It is important to note that specific restrictions and limitations may vary depending on your state or jurisdiction, as well as your individual license and endorsement qualifications.
1. Vehicle weight: Drivers with a Class B CDL may only operate a vehicle with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or a combination of vehicles with a GCWR of 26,001 pounds or more.
2. Passenger restrictions: Drivers with a Class B CDL may only transport up to 16 passengers (including the driver) in a single vehicle.
3. Hazardous materials: Drivers with a Class B CDL may transport hazardous materials in amounts that require placards on the vehicle, but only if they have also obtained the required Hazardous Materials (H) endorsement.
4. Interstate vs. intrastate: Drivers with a Class B CDL may be restricted to operating only within their state (intrastate) or may be allowed to operate across state lines (interstate), depending on their individual license and endorsement qualifications.
It is important to note that specific restrictions and limitations may vary depending on your state or jurisdiction, as well as your individual license and endorsement qualifications.
It depends on the state or jurisdiction where you are applying for your Class B CDL license. Some states may offer the written test in languages other than English, while others may not. It is best to check with your local Department of Motor Vehicles (DMV) or licensing agency to determine if they offer the test in a language other than English.
If the written test is not available in your preferred language, you may still be able to take the test with the help of an interpreter. However, this may require additional arrangements and fees, and you will need to check with your local DMV or licensing agency about their specific rules and requirements for using an interpreter during the test.
It is important to note that even if you take the written test in a language other than English, you will still need to be able to read and understand English for other aspects of the CDL application process, such as the pre-trip inspection and on-road skills tests.
If the written test is not available in your preferred language, you may still be able to take the test with the help of an interpreter. However, this may require additional arrangements and fees, and you will need to check with your local DMV or licensing agency about their specific rules and requirements for using an interpreter during the test.
It is important to note that even if you take the written test in a language other than English, you will still need to be able to read and understand English for other aspects of the CDL application process, such as the pre-trip inspection and on-road skills tests.
Yes, you may be able to request accommodations for the Class B CDL written test if you have a disability. The Federal Motor Carrier Safety Administration (FMCSA) requires states to provide reasonable accommodations for individuals with disabilities who are applying for a CDL.
The specific accommodations that may be available will depend on your individual needs and the nature of your disability. Some possible accommodations could include extended testing time, a separate testing room, a sign language interpreter, or a reader to assist with reading and understanding the test questions.
To request accommodations, you will need to contact your local DMV or licensing agency and provide documentation of your disability and your specific accommodation needs. It is important to make this request as early as possible in the application process to allow time for any necessary arrangements to be made.
It is also worth noting that some states may have their own specific requirements and procedures for requesting accommodations, so be sure to check with your local DMV or licensing agency for their specific rules and guidelines.
The specific accommodations that may be available will depend on your individual needs and the nature of your disability. Some possible accommodations could include extended testing time, a separate testing room, a sign language interpreter, or a reader to assist with reading and understanding the test questions.
To request accommodations, you will need to contact your local DMV or licensing agency and provide documentation of your disability and your specific accommodation needs. It is important to make this request as early as possible in the application process to allow time for any necessary arrangements to be made.
It is also worth noting that some states may have their own specific requirements and procedures for requesting accommodations, so be sure to check with your local DMV or licensing agency for their specific rules and guidelines.
If you fail the Class B CDL written test, you will typically be given the opportunity to retake the test after a certain period of time. The specific waiting period and number of times you can retake the test will depend on the rules and regulations of your state or jurisdiction.
In most cases, you will need to pay a fee each time you retake the test. It is important to use the time between tests to study and prepare for the exam, so that you can improve your chances of passing on your next attempt.
If you fail the test multiple times, you may be required to complete additional training or education before being allowed to retake the exam again. It is important to check with your local DMV or licensing agency to understand their specific rules and requirements for retaking the Class B CDL written test.
In most cases, you will need to pay a fee each time you retake the test. It is important to use the time between tests to study and prepare for the exam, so that you can improve your chances of passing on your next attempt.
If you fail the test multiple times, you may be required to complete additional training or education before being allowed to retake the exam again. It is important to check with your local DMV or licensing agency to understand their specific rules and requirements for retaking the Class B CDL written test.
