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.
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Frequently Asked Questions
A Class B Commercial Driver's License (CDL) in District Of Columbia allows you to operate a single vehicle with a gross weight of 26,001 pounds or more, or a combination of vehicles with a gross weight of less than 26,001 pounds. It also allows you to tow a trailer with a gross weight of less than 10,000 pounds.
To obtain a Class B CDL in District Of Columbia, you must:
1. Be at least 18 years old.
2. Possess a valid District Of Columbia driver's license.
3. Obtain a Commercial Learner's Permit (CLP) by passing the written knowledge test for the Class B CDL.
4. Hold the CLP for at least 14 days before taking the skills test.
5. Pass the pre-trip inspection, basic vehicle control, and on-road driving skills tests for the Class B CDL.
6. Submit to and pass a medical examination and obtain a Medical Examiner's Certificate.
7. Pay the required fees.
It's important to note that additional endorsements may be required depending on the type of vehicle and cargo you will be transporting.
To obtain a Class B CDL in District Of Columbia, you must:
1. Be at least 18 years old.
2. Possess a valid District Of Columbia driver's license.
3. Obtain a Commercial Learner's Permit (CLP) by passing the written knowledge test for the Class B CDL.
4. Hold the CLP for at least 14 days before taking the skills test.
5. Pass the pre-trip inspection, basic vehicle control, and on-road driving skills tests for the Class B CDL.
6. Submit to and pass a medical examination and obtain a Medical Examiner's Certificate.
7. Pay the required fees.
It's important to note that additional endorsements may be required depending on the type of vehicle and cargo you will be transporting.
With a Class B CDL license in District Of Columbia, you are authorized to operate a single vehicle with a gross weight of 26,001 pounds or more, or a combination of vehicles with a gross weight of less than 26,001 pounds. This includes:
1. Straight trucks: These are trucks with all axles attached to a single frame, including dump trucks, delivery trucks, and garbage trucks.
2. Buses: Class B CDL holders can drive buses that carry 16 or more passengers (including the driver) and weigh less than 26,001 pounds.
3. Tractor-trailers: Class B CDL holders can drive combination vehicles that consist of a tractor and single trailer with a gross weight of less than 26,001 pounds.
It's important to note that additional endorsements may be required depending on the type of vehicle and cargo you will be transporting.
1. Straight trucks: These are trucks with all axles attached to a single frame, including dump trucks, delivery trucks, and garbage trucks.
2. Buses: Class B CDL holders can drive buses that carry 16 or more passengers (including the driver) and weigh less than 26,001 pounds.
3. Tractor-trailers: Class B CDL holders can drive combination vehicles that consist of a tractor and single trailer with a gross weight of less than 26,001 pounds.
It's important to note that additional endorsements may be required depending on the type of vehicle and cargo you will be transporting.
To obtain a Class B Commercial Driver's License (CDL) in District Of Columbia, you must meet the following requirements:
1. Be at least 18 years old.
2. Hold a valid District Of Columbia driver's license.
3. Pass a Department of Motor Vehicles (DMV) written exam to obtain a Commercial Learner's Permit (CLP).
4. Hold the CLP for at least 14 days before taking the skills test.
5. Pass a three-part skills test that includes:
- Pre-trip inspection: You must be able to identify and explain the parts and components of your vehicle, and demonstrate that they are in good working order.
- Basic vehicle control: You must be able to safely operate your vehicle in tight spaces, such as backing up and turning around.
- On-road driving: You must be able to safely operate your vehicle in traffic, including turning, merging, and changing lanes.
6. Obtain a Medical Examiner's Certificate by passing a Department of Transportation physical exam from a qualified medical professional.
7. Pay the required fees.
It's important to note that additional endorsements may be required depending on the type of vehicle and cargo you will be transporting.
1. Be at least 18 years old.
2. Hold a valid District Of Columbia driver's license.
3. Pass a Department of Motor Vehicles (DMV) written exam to obtain a Commercial Learner's Permit (CLP).
4. Hold the CLP for at least 14 days before taking the skills test.
5. Pass a three-part skills test that includes:
- Pre-trip inspection: You must be able to identify and explain the parts and components of your vehicle, and demonstrate that they are in good working order.
- Basic vehicle control: You must be able to safely operate your vehicle in tight spaces, such as backing up and turning around.
- On-road driving: You must be able to safely operate your vehicle in traffic, including turning, merging, and changing lanes.
6. Obtain a Medical Examiner's Certificate by passing a Department of Transportation physical exam from a qualified medical professional.
7. Pay the required fees.
It's important to note that additional endorsements may be required depending on the type of vehicle and cargo you will be transporting.
In District Of Columbia, the minimum age requirement for obtaining a Class B CDL license is 18 years old. However, there are certain restrictions for drivers under the age of 21. Drivers under the age of 21 are not allowed to transport hazardous materials or operate a commercial vehicle outside of District Of Columbia. Additionally, drivers under the age of 21 must hold a commercial learner's permit for a minimum of 30 days before they can take the skills test to obtain their Class B CDL license.
Yes, you may need endorsements for a Class B CDL license depending on the type of vehicle and cargo you will be transporting. The following are the most common endorsements for a Class B CDL license:
1. Passenger (P) endorsement: Required for those who will be driving vehicles designed to transport 16 or more passengers, including the driver.
2. School Bus (S) endorsement: Required for those who will be driving a school bus.
3. Tanker (N) endorsement: Required for those who will be transporting liquids or gases in bulk containers with a capacity of 1,000 gallons or more.
4. Hazardous Materials (H) endorsement: Required for those who will be transporting hazardous materials that require placards on the vehicle.
To obtain an endorsement, you must pass a written exam specific to that endorsement and pay the required fees. Note that some endorsements may also require additional background checks and/or training courses.
1. Passenger (P) endorsement: Required for those who will be driving vehicles designed to transport 16 or more passengers, including the driver.
2. School Bus (S) endorsement: Required for those who will be driving a school bus.
3. Tanker (N) endorsement: Required for those who will be transporting liquids or gases in bulk containers with a capacity of 1,000 gallons or more.
4. Hazardous Materials (H) endorsement: Required for those who will be transporting hazardous materials that require placards on the vehicle.
To obtain an endorsement, you must pass a written exam specific to that endorsement and pay the required fees. Note that some endorsements may also require additional background checks and/or training courses.
The Class B CDL skills test in District Of Columbia consists of three parts:
1. Pre-trip inspection: You will be asked to perform a pre-trip inspection of your vehicle and explain to the examiner what you are checking and why.
2. Basic vehicle control: You will be asked to demonstrate your ability to control the vehicle in a closed course setting, which may include maneuvers such as backing, turning, and shifting.
3. On-road test: You will be asked to drive the vehicle on public roads and demonstrate your ability to safely operate the vehicle in various traffic situations.
During the skills test, you will be evaluated on your ability to handle the vehicle safely, follow traffic laws and signs, use proper signaling techniques, and perform all necessary maneuvers with control and precision. To pass the skills test, you must complete all three parts of the exam with a passing score. The exact passing score may vary depending on the specific exam location.
1. Pre-trip inspection: You will be asked to perform a pre-trip inspection of your vehicle and explain to the examiner what you are checking and why.
2. Basic vehicle control: You will be asked to demonstrate your ability to control the vehicle in a closed course setting, which may include maneuvers such as backing, turning, and shifting.
3. On-road test: You will be asked to drive the vehicle on public roads and demonstrate your ability to safely operate the vehicle in various traffic situations.
During the skills test, you will be evaluated on your ability to handle the vehicle safely, follow traffic laws and signs, use proper signaling techniques, and perform all necessary maneuvers with control and precision. To pass the skills test, you must complete all three parts of the exam with a passing score. The exact passing score may vary depending on the specific exam location.
Yes, there are some restrictions or limitations for drivers with a Class B CDL license. Here are some common restrictions that you may encounter:
1. Vehicle weight: If you obtained your Class B CDL license in a vehicle that weighed less than 26,001 pounds or did not have air brakes, you may be restricted from driving larger vehicles or those with air brakes.
2. Endorsements: As I mentioned earlier, if you do not have the required endorsements for certain types of vehicles or cargo, you will be restricted from operating those vehicles.
3. Passenger restrictions: If you obtained your Class B CDL license without a passenger endorsement, you will be restricted from driving vehicles designed to transport 16 or more passengers.
4. Time of day: Some states may have restrictions on when drivers with a Class B CDL license can operate their vehicles, such as during certain hours of the day or night.
It's important to note that restrictions may vary by state and depending on the specific circumstances of your license. Be sure to check with your local DMV or licensing agency for more information about any restrictions that may apply to you.
1. Vehicle weight: If you obtained your Class B CDL license in a vehicle that weighed less than 26,001 pounds or did not have air brakes, you may be restricted from driving larger vehicles or those with air brakes.
2. Endorsements: As I mentioned earlier, if you do not have the required endorsements for certain types of vehicles or cargo, you will be restricted from operating those vehicles.
3. Passenger restrictions: If you obtained your Class B CDL license without a passenger endorsement, you will be restricted from driving vehicles designed to transport 16 or more passengers.
4. Time of day: Some states may have restrictions on when drivers with a Class B CDL license can operate their vehicles, such as during certain hours of the day or night.
It's important to note that restrictions may vary by state and depending on the specific circumstances of your license. Be sure to check with your local DMV or licensing agency for more information about any restrictions that may apply to you.
Yes, in District of Columbia, you may be able to take the Class B CDL written test in a language other than English. The District of Columbia Department of Motor Vehicles (DMV) offers the test in several languages, including Spanish, French, German, Korean, Vietnamese, Chinese, and Amharic.
However, it's important to note that not all DMV locations may offer the test in every language. You should contact your local DMV office to confirm which languages are available at your location and make arrangements for the test.
Additionally, if you choose to take the test in a language other than English, you will need to bring an interpreter with you who is fluent in both your chosen language and English. The interpreter must be at least 18 years old and may not be a family member or friend.
Remember that passing the written test is only one step in obtaining a Class B CDL license. You will also need to pass the skills test and meet all other requirements for licensure.
However, it's important to note that not all DMV locations may offer the test in every language. You should contact your local DMV office to confirm which languages are available at your location and make arrangements for the test.
Additionally, if you choose to take the test in a language other than English, you will need to bring an interpreter with you who is fluent in both your chosen language and English. The interpreter must be at least 18 years old and may not be a family member or friend.
Remember that passing the written test is only one step in obtaining a Class B CDL license. You will also need to pass the skills test and meet all other requirements for licensure.
Yes, you can request accommodations for the Class B CDL written test due to a disability. In District of Columbia, the DMV provides reasonable accommodations to individuals with disabilities to ensure equal access to its services and programs.
To request accommodations for the written test, you will need to contact your local DMV office and provide documentation of your disability. The DMV will review your request and work with you to determine what accommodations are appropriate. Some examples of accommodations that may be provided include extra time to complete the test, a separate testing room, or a sign language interpreter.
It's important to note that you must make your request for accommodations at least 30 days before your scheduled test date. This will give the DMV enough time to review your request and make arrangements.
Remember that passing the written test is only one step in obtaining a Class B CDL license. You will also need to pass the skills test and meet all other requirements for licensure.
To request accommodations for the written test, you will need to contact your local DMV office and provide documentation of your disability. The DMV will review your request and work with you to determine what accommodations are appropriate. Some examples of accommodations that may be provided include extra time to complete the test, a separate testing room, or a sign language interpreter.
It's important to note that you must make your request for accommodations at least 30 days before your scheduled test date. This will give the DMV enough time to review your request and make arrangements.
Remember that passing the written test is only one step in obtaining a Class B CDL license. You will also need to pass the skills test and meet all other requirements for licensure.
Yes, if you fail the Class B CDL written test, you can retake it. In District of Columbia, you are allowed to retake the test after a waiting period of one business day.
If you fail the test, the DMV will provide you with a score report that outlines which areas you need to study before retaking the test. You can use this report to identify your weaknesses and focus your study efforts in those areas.
It's important to note that there is a limit to how many times you can retake the test. In District of Columbia, you are allowed to take the test three times within a year. If you fail the third time, you will have to wait one year from the date of your last attempt before taking it again.
To retake the test, you will need to schedule another appointment with the DMV and pay any applicable fees. It's important to study thoroughly and feel confident in your knowledge before retaking the test to minimize your chances of failing again.
If you fail the test, the DMV will provide you with a score report that outlines which areas you need to study before retaking the test. You can use this report to identify your weaknesses and focus your study efforts in those areas.
It's important to note that there is a limit to how many times you can retake the test. In District of Columbia, you are allowed to take the test three times within a year. If you fail the third time, you will have to wait one year from the date of your last attempt before taking it again.
To retake the test, you will need to schedule another appointment with the DMV and pay any applicable fees. It's important to study thoroughly and feel confident in your knowledge before retaking the test to minimize your chances of failing again.
