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
36. How can you prevent drowsiness before a trip?
Explanation
To prevent drowsiness on a long trip, strategies include getting adequate sleep beforehand; planning out the route and stopping points in advance; driving with a passenger; and driving at times during which you are normally awake.
37. Pre-trip inspections should be done:
Explanation
Pre-trip inspections should be conducted in the same way every time. This will reinforce the steps, making it less likely that you will forget to inspect something important.
38. Which of the following is not a way to reduce driving distractions?
Explanation
Strategies for avoiding distracted driving include pre-programming radio stations; planning out your route in advance; adjusting your mirrors before setting out; and not eating, drinking, or smoking while behind the wheel.
39. Hydraulic brakes can fail for one of two reasons. Which of the following is one of those reasons?
Explanation
Most hydraulic brake failures occur for one of two reasons. A first likely cause of brake failure is that the brakes have been overused on a downgrade, causing them to fade. The second likely cause is that there has been a loss of hydraulic pressure in the braking system. Brakes kept in good condition will rarely fail, but you should know which steps to take in case they do.
40. When driving down a steep grade, your brakes may fade. What happens if brakes fade?
Explanation
If you use your brakes too much when traveling on a steep downgrade, they may overheat and become less effective. To avoid causing your brakes to overheat on a steep hill, you should rely on engine braking.
41. When changing lanes, you should:
Explanation
Always change lanes slowly and smoothly. If there is a vehicle in the other lane that you did not see before beginning to move, they will have more time to react to your vehicle.
42. To make it as safe as possible to leave a stop, you should park:
Explanation
Backing can be dangerous, so avoid doing it whenever you can. If possible, park in such a way that allows you to pull forward to exit your parking space.
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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.
