Knowledge Test Class B
This license is required for driving a single vehicle with a GVWR of more than 26,000 pounds, a 3-axle vehicle weighing over 6,000 pounds, a bus (except a trailer bus), with endorsement or any farm labor vehicle, with endorsement. To receive this license, applicants must pass a 50-question test. Each question has three answer choices. To pass, applicants must answer 40 questions correctly. Test questions come from the California Commercial Driver Handbook. Questions come from chapters covering: Introduction, Driving Safely, Transporting Cargo Safely, Air Brakes (if applicable), Combination Vehicles, 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. To ensure normal stopping power, drivers of vehicles equipped with a front brake limiting valve should:
Explanation
Some older vehicles have front brake limiting valves with "normal" and "slippery" settings. Setting a brake limiting valve to "slippery" reduces the vehicle's stopping power, so a driver should make sure the valve is in its "normal" position. Front wheel braking has proven to be effective in all driving conditions.
37. When driving on a long downhill slope, you should brake by:
Explanation
When approaching a long downgrade, you should shift into a lower gear then use proper braking techniques. Using the brakes alone could cause them to overheat and fail. The braking power of the engine, which is maximized by being in a lower gear, will be the principal way of controlling your speed on a downgrade.
38. Of the following, which is the most slippery surface?
Explanation
Ice becomes wet when the weather is just warm enough to melt the ice slightly. Wet ice is much more slippery than ice that is not wet.
39. Your horn should be used to:
Explanation
Your vehicle's horn is a tool to warn others of your presence. Because the horn may create danger by startling other drivers, you should use it only if necessary.
40. If confronted by an aggressive driver, you should:
Explanation
If confronted by an aggressive driver, it is most important to get out of their way, if possible. Do not make eye contact with the driver, as doing so could provoke them. Do not let them provoke you with their actions.
41. To inspect slack adjusters on S-cam brakes, you need to:
Explanation
Check each slack adjuster after parking on level ground, setting wheel chocks, and disengaging the parking brake. Pull the slack adjusters to make sure they do not move more than about one inch from where the push rod is attached. If they move more than one inch, they may be out of adjustment and will need to be fixed.
42. When driving on a wet road, you should reduce your speed by:
Explanation
Reduce your speed when traveling on surfaces that provide reduced traction. Reduce your speed by about one-third when driving on a wet road.
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Frequently Asked Questions
Class B CDL (Commercial Driver's License) is a type of license that allows the holder to operate a single commercial vehicle with a GVWR (Gross Vehicle Weight Rating) of 26,001 pounds or more. Class B CDL also allows the holder to tow a vehicle with a GVWR of less than 10,000 pounds. In California, Class B CDL is required for operating vehicles such as buses, straight trucks, and large passenger vans.
To obtain a Class B CDL in California, you need to:
1. Meet the basic eligibility requirements such as being at least 18 years old and having a valid California driver's license.
2. Obtain a California Commercial Learner's Permit (CLP) by passing the written knowledge test for Class B vehicles.
3. Complete the required training and practice driving with a qualified supervisor.
4. Pass the skills test which consists of three parts: pre-trip inspection, basic vehicle control, and on-road driving test.
5. Submit the required documents, pay the fees, and get your new Class B CDL license.
It is important to note that additional endorsements may be required for specific types of vehicles or cargo such as hazardous materials or passenger transport.
To obtain a Class B CDL in California, you need to:
1. Meet the basic eligibility requirements such as being at least 18 years old and having a valid California driver's license.
2. Obtain a California Commercial Learner's Permit (CLP) by passing the written knowledge test for Class B vehicles.
3. Complete the required training and practice driving with a qualified supervisor.
4. Pass the skills test which consists of three parts: pre-trip inspection, basic vehicle control, and on-road driving test.
5. Submit the required documents, pay the fees, and get your new Class B CDL license.
It is important to note that additional endorsements may be required for specific types of vehicles or cargo such as hazardous materials or passenger transport.
With a Class B CDL license in California, you can operate a single commercial vehicle with a GVWR (Gross Vehicle Weight Rating) of 26,001 pounds or more. This includes:
- Straight trucks (e.g., delivery trucks, dump trucks)
- Large buses (e.g., city buses, charter buses)
- Segmented buses (e.g., Greyhound-style buses)
- Box trucks with trailers or towed vehicles with a GVWR of less than 10,000 pounds
- Certain types of recreational vehicles (RVs) that exceed 40 feet in length
- Concrete mixing trucks
- Tow trucks with a GVWR of 26,001 pounds or more
It is important to note that additional endorsements may be required for specific types of vehicles or cargo such as hazardous materials or passenger transport. Also, some employers may require additional training or certification beyond what is required for obtaining a Class B CDL license.
- Straight trucks (e.g., delivery trucks, dump trucks)
- Large buses (e.g., city buses, charter buses)
- Segmented buses (e.g., Greyhound-style buses)
- Box trucks with trailers or towed vehicles with a GVWR of less than 10,000 pounds
- Certain types of recreational vehicles (RVs) that exceed 40 feet in length
- Concrete mixing trucks
- Tow trucks with a GVWR of 26,001 pounds or more
It is important to note that additional endorsements may be required for specific types of vehicles or cargo such as hazardous materials or passenger transport. Also, some employers may require additional training or certification beyond what is required for obtaining a Class B CDL license.
To obtain a Class B CDL (Commercial Driver's License) in California, you need to meet the following requirements:
1. Age: You must be at least 18 years old to obtain a Class B CDL. However, if you plan to drive across state lines or transport hazardous materials, you must be at least 21 years old.
2. Valid California driver's license: You must have a valid California driver's license before applying for a Class B CDL.
3. Medical certificate: You must pass a medical examination and obtain a valid medical certificate from a certified medical examiner.
4. Commercial Learner's Permit (CLP): You must obtain a California Commercial Learner's Permit by passing the written knowledge test for Class B vehicles.
5. Training: You must complete the required training and practice driving with a qualified supervisor.
6. Skills Test: You must pass the skills test which consists of three parts: pre-trip inspection, basic vehicle control, and on-road driving test.
7. Documents and Fees: You must submit the required documents such as your CLP, medical certificate, and proof of residency, as well as pay the required fees.
It is important to note that additional endorsements may be required for specific types of vehicles or cargo such as hazardous materials or passenger transport.
1. Age: You must be at least 18 years old to obtain a Class B CDL. However, if you plan to drive across state lines or transport hazardous materials, you must be at least 21 years old.
2. Valid California driver's license: You must have a valid California driver's license before applying for a Class B CDL.
3. Medical certificate: You must pass a medical examination and obtain a valid medical certificate from a certified medical examiner.
4. Commercial Learner's Permit (CLP): You must obtain a California Commercial Learner's Permit by passing the written knowledge test for Class B vehicles.
5. Training: You must complete the required training and practice driving with a qualified supervisor.
6. Skills Test: You must pass the skills test which consists of three parts: pre-trip inspection, basic vehicle control, and on-road driving test.
7. Documents and Fees: You must submit the required documents such as your CLP, medical certificate, and proof of residency, as well as pay the required fees.
It is important to note that additional endorsements may be required for specific types of vehicles or cargo such as hazardous materials or passenger transport.
The minimum age requirement to obtain a Class B CDL (Commercial Driver's License) in California is 18 years old. However, there are some restrictions for drivers under the age of 21. Drivers who are 18, 19, or 20 years old can only operate commercial vehicles within California and cannot transport hazardous materials or drive across state lines. Additionally, some employers may have their own age restrictions or requirements for certain jobs or types of vehicles. It's important to check with the hiring company or the California Department of Motor Vehicles (DMV) for specific age requirements and restrictions related to obtaining a Class B CDL license.
Yes, you may need to obtain endorsements in addition to a Class B CDL (Commercial Driver's License) depending on the type of vehicle you plan to operate and the cargo you plan to transport. Some common endorsements for Class B CDL holders include:
1. Passenger (P) endorsement: required for drivers who transport passengers, such as in a bus or shuttle.
2. School Bus (S) endorsement: required for drivers who operate a school bus.
3. Tank Vehicle (N) endorsement: required for drivers who transport liquid or gas in bulk containers.
4. Hazardous Materials (H) endorsement: required for drivers who transport hazardous materials.
5. Doubles/Triples (T) endorsement: required for drivers who operate double or triple trailers.
6. Air Brakes (L) endorsement: required for drivers who operate vehicles with air brakes.
To obtain an endorsement, you must pass a written knowledge test and, in some cases, a skills test. You may also need to meet additional requirements, such as obtaining a medical certificate or completing specialized training. It's important to check with the California Department of Motor Vehicles (DMV) to determine which endorsements you need based on your specific driving situation.
1. Passenger (P) endorsement: required for drivers who transport passengers, such as in a bus or shuttle.
2. School Bus (S) endorsement: required for drivers who operate a school bus.
3. Tank Vehicle (N) endorsement: required for drivers who transport liquid or gas in bulk containers.
4. Hazardous Materials (H) endorsement: required for drivers who transport hazardous materials.
5. Doubles/Triples (T) endorsement: required for drivers who operate double or triple trailers.
6. Air Brakes (L) endorsement: required for drivers who operate vehicles with air brakes.
To obtain an endorsement, you must pass a written knowledge test and, in some cases, a skills test. You may also need to meet additional requirements, such as obtaining a medical certificate or completing specialized training. It's important to check with the California Department of Motor Vehicles (DMV) to determine which endorsements you need based on your specific driving situation.
The Class B CDL (Commercial Driver's License) skills test is designed to evaluate your ability to operate a Class B commercial vehicle safely and effectively. The skills test consists of three parts:
1. Pre-trip inspection: You must demonstrate your knowledge of the vehicle's components and safety features by conducting a thorough pre-trip inspection. This includes checking the brakes, tires, lights, steering, suspension, and other important systems.
2. Basic control skills: You must demonstrate your ability to control the vehicle in various driving situations, such as backing up, turning around, and parking. This portion of the test is conducted in a controlled environment, such as a driving range.
3. Road test: You must demonstrate your ability to safely operate the vehicle in real-world driving conditions on public roads. The road test will evaluate your ability to follow traffic laws and signals, maintain control of the vehicle, and interact with other drivers.
During the skills test, you will be evaluated by a DMV examiner who will score you based on your performance in each of these three areas. To pass the skills test, you must achieve a passing score in each area and have an overall passing score. It's important to practice and prepare for the skills test by studying the California Commercial Driver Handbook and working with a qualified driving instructor if possible.
1. Pre-trip inspection: You must demonstrate your knowledge of the vehicle's components and safety features by conducting a thorough pre-trip inspection. This includes checking the brakes, tires, lights, steering, suspension, and other important systems.
2. Basic control skills: You must demonstrate your ability to control the vehicle in various driving situations, such as backing up, turning around, and parking. This portion of the test is conducted in a controlled environment, such as a driving range.
3. Road test: You must demonstrate your ability to safely operate the vehicle in real-world driving conditions on public roads. The road test will evaluate your ability to follow traffic laws and signals, maintain control of the vehicle, and interact with other drivers.
During the skills test, you will be evaluated by a DMV examiner who will score you based on your performance in each of these three areas. To pass the skills test, you must achieve a passing score in each area and have an overall passing score. It's important to practice and prepare for the skills test by studying the California Commercial Driver Handbook and working with a qualified driving instructor if possible.
Yes, there are some restrictions and limitations for drivers with a Class B CDL (Commercial Driver's License) license in California. These include:
1. Vehicle weight restrictions: Class B CDL holders are typically restricted to operating vehicles with a maximum gross vehicle weight rating (GVWR) of 26,001 pounds or less.
2. Passenger restrictions: Class B CDL holders may be restricted from transporting passengers depending on the type of endorsement they have. For example, drivers with a Passenger (P) endorsement are authorized to transport passengers while those without this endorsement are not.
3. Hazardous materials restrictions: Class B CDL holders may be restricted from transporting certain hazardous materials depending on the type of endorsement they have. For example, drivers with a Hazardous Materials (H) endorsement are authorized to transport hazardous materials while those without this endorsement are not.
4. Air brake restrictions: Class B CDL holders may be restricted from operating vehicles with air brakes if they do not have an Air Brakes (L) endorsement.
5. Interstate commerce restrictions: Class B CDL holders who operate commercial vehicles in interstate commerce must comply with federal regulations, including hours of service and other safety requirements.
It's important to note that these restrictions and limitations may vary depending on the specific circumstances and endorsements held by the driver. It's important to check with the California Department of Motor Vehicles (DMV) for specific information about your Class B CDL license and any associated restrictions or limitations.
1. Vehicle weight restrictions: Class B CDL holders are typically restricted to operating vehicles with a maximum gross vehicle weight rating (GVWR) of 26,001 pounds or less.
2. Passenger restrictions: Class B CDL holders may be restricted from transporting passengers depending on the type of endorsement they have. For example, drivers with a Passenger (P) endorsement are authorized to transport passengers while those without this endorsement are not.
3. Hazardous materials restrictions: Class B CDL holders may be restricted from transporting certain hazardous materials depending on the type of endorsement they have. For example, drivers with a Hazardous Materials (H) endorsement are authorized to transport hazardous materials while those without this endorsement are not.
4. Air brake restrictions: Class B CDL holders may be restricted from operating vehicles with air brakes if they do not have an Air Brakes (L) endorsement.
5. Interstate commerce restrictions: Class B CDL holders who operate commercial vehicles in interstate commerce must comply with federal regulations, including hours of service and other safety requirements.
It's important to note that these restrictions and limitations may vary depending on the specific circumstances and endorsements held by the driver. It's important to check with the California Department of Motor Vehicles (DMV) for specific information about your Class B CDL license and any associated restrictions or limitations.
Yes, you can take the Class B CDL (Commercial Driver's License) written test in a language other than English in California. The California DMV offers the written test in several different languages, including Spanish, Chinese, Korean, Vietnamese, and more.
To take the written test in a language other than English, you will need to indicate your preferred language when you apply for your Class B CDL permit. You will then be provided with a version of the written test in your preferred language.
It's important to note that while you may take the written test in a language other than English, you will still need to demonstrate your ability to read and understand English as part of the testing process. This includes reading road signs and understanding verbal instructions given by a DMV examiner during the skills test.
If you have any questions or concerns about taking the Class B CDL written test in a language other than English, you should contact the California DMV for more information.
To take the written test in a language other than English, you will need to indicate your preferred language when you apply for your Class B CDL permit. You will then be provided with a version of the written test in your preferred language.
It's important to note that while you may take the written test in a language other than English, you will still need to demonstrate your ability to read and understand English as part of the testing process. This includes reading road signs and understanding verbal instructions given by a DMV examiner during the skills test.
If you have any questions or concerns about taking the Class B CDL written test in a language other than English, you should contact the California DMV for more information.
Yes, you can request accommodations for the Class B CDL (Commercial Driver's License) written test in California if you have a disability that would make it difficult for you to take the test under standard conditions. The California Department of Motor Vehicles (DMV) offers a range of accommodations to ensure that all individuals have an equal opportunity to obtain a driver's license.
To request accommodations for the Class B CDL written test, you will need to submit a completed DMV Request for Accommodations form (Form DL 309) along with documentation of your disability. The DMV will then review your request and determine what accommodations are appropriate based on your specific needs.
Some examples of accommodations that may be available for the Class B CDL written test include:
- Extending the time allowed to take the test
- Providing a private testing area
- Providing an interpreter or reader
- Providing special equipment or materials, such as a larger font size or Braille materials
It's important to note that requests for accommodations must be made in advance and may require additional processing time. If you have any questions or concerns about requesting accommodations for the Class B CDL written test, you should contact the California DMV for more information.
To request accommodations for the Class B CDL written test, you will need to submit a completed DMV Request for Accommodations form (Form DL 309) along with documentation of your disability. The DMV will then review your request and determine what accommodations are appropriate based on your specific needs.
Some examples of accommodations that may be available for the Class B CDL written test include:
- Extending the time allowed to take the test
- Providing a private testing area
- Providing an interpreter or reader
- Providing special equipment or materials, such as a larger font size or Braille materials
It's important to note that requests for accommodations must be made in advance and may require additional processing time. If you have any questions or concerns about requesting accommodations for the Class B CDL written test, you should contact the California DMV for more information.
If you fail the Class B CDL (Commercial Driver's License) written test in California, you will be allowed to retake the test. However, you will need to wait at least one day before taking the test again. You will also need to pay a fee for each attempt.
It's important to note that you are only allowed a certain number of attempts to pass the written test within a specific period of time. If you fail the test multiple times, you may be required to wait a longer period of time before you are allowed to retake it again.
To increase your chances of passing the Class B CDL written test on your first attempt, it's important to study and prepare thoroughly. The California DMV provides a Commercial Driver Handbook that covers all of the information you will need to know for the written test. You can also take practice tests online or through study guides to help prepare.
If you have any questions or concerns about retaking the Class B CDL written test in California, you should contact the DMV for more information.
It's important to note that you are only allowed a certain number of attempts to pass the written test within a specific period of time. If you fail the test multiple times, you may be required to wait a longer period of time before you are allowed to retake it again.
To increase your chances of passing the Class B CDL written test on your first attempt, it's important to study and prepare thoroughly. The California DMV provides a Commercial Driver Handbook that covers all of the information you will need to know for the written test. You can also take practice tests online or through study guides to help prepare.
If you have any questions or concerns about retaking the Class B CDL written test in California, you should contact the DMV for more information.
