Knowledge Test Class A
This license is required for driving any legal combination of vehicles, with a gross combination weight rating of 26,001 pounds or more, provided the GVWR of a trailer exceeds 10,000 pounds To receive this license, applicants must pass a 50-question test. To pass, applicants must answer 40 questions correctly. Each question has three possible answer choices. Test questions come from the Oklahoma Commercial Driver License Manual. Questions come from chapters covering: Introduction, Driving Safely, Transporting Cargo Safely, Air Brakes (if applicable), Combination, Doubles and Hazardous Materials. Endorsements that may be used with a Class A CDL are: Hazardous materials, Tank, Passenger, HazMat and Tank, Air Brakes and School bus.
Number of Question
Passing Score
15. The rods in S-cam brakes move the slack adjusters when air pressure is added to the brake chambers. This air pressure is added to the chambers when the driver:
Explanation
When pressing the brake pedal in a vehicle with S-cam brakes, air will enter the brake chambers. The added air pressure will push out the rods and move slack adjusters, twisting the brake camshafts.
16. As part of a pre-trip inspection, you should look for all of the following, except:
Explanation
When inspecting your tires, verify that there is tread depth of at least 4/32 of an inch in every major groove on the front tires and tread depth of at least 2/32 of an inch in grooves on the other tires. Be sure that your tires are not too worn, are not cracked, have proper air pressure, and are all equally sized.
17. When leaving a vehicle unattended, a driver should:
Explanation
Always apply the parking brake when leaving your vehicle unattended.
18. Who is responsible for ensuring cargo is loaded properly?
Explanation
A driver is responsible for four things related to transporting cargo. They are responsible for inspecting the cargo, recognizing overloads and poorly balanced weight, ensuring that the cargo is secured without obstructing their view, and ensuring that the cargo is not obstructing access to emergency equipment.
19. How can you check hydraulic brakes?
Explanation
Check hydraulic brakes by pumping the brake pedal three times before applying firm pressure to the pedal for five seconds. The pedal should not move. If it does, there may be a leak or some other problem in the braking system.
20. A safety valve is set to open at ____ pounds per square inch (psi).
Explanation
The safety valve protects air tanks and the rest of an air brake system from accumulating too much air pressure. The safety valve is usually set to open at 150 psi.
21. Why should you regularly drain the air tanks?
Explanation
Compressed air usually contains a certain amount of moisture and compressor oil, which can build up in the air storage tanks and damage the brake system. The tanks should be drained to clean out these accumulations. On a tank with a manual drain valve, draining should be performed at the end of each day of driving.
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Frequently Asked Questions
A Class A Commercial Driver's License (CDL) is a type of license required to operate a combination of vehicles with a total weight of 26,001 pounds or more. In Oklahoma, this includes any combination of vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, provided that the vehicle being towed has a GVWR of more than 10,000 pounds.
To obtain a Class A CDL license in Oklahoma, you must meet certain requirements, including passing a written knowledge test and a skills test. You must also meet specific medical and physical qualifications and provide proof of identity and residency in Oklahoma.
Additionally, you may be required to obtain endorsements on your CDL for certain types of driving, such as hazardous materials or passenger transport. These endorsements will require additional testing and training.
It is important to note that driving with a CDL comes with additional responsibilities and stricter regulations than driving with a regular driver's license. It is important to follow all traffic laws and safety guidelines to maintain your CDL license and ensure the safety of yourself and others on the road.
To obtain a Class A CDL license in Oklahoma, you must meet certain requirements, including passing a written knowledge test and a skills test. You must also meet specific medical and physical qualifications and provide proof of identity and residency in Oklahoma.
Additionally, you may be required to obtain endorsements on your CDL for certain types of driving, such as hazardous materials or passenger transport. These endorsements will require additional testing and training.
It is important to note that driving with a CDL comes with additional responsibilities and stricter regulations than driving with a regular driver's license. It is important to follow all traffic laws and safety guidelines to maintain your CDL license and ensure the safety of yourself and others on the road.
With a Class A CDL license in Oklahoma, you are authorized to operate combination vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more. This includes any combination of vehicles where the towed vehicle has a GVWR of more than 10,000 pounds.
Some examples of vehicles you can operate with a Class A CDL license include:
- Tractor-trailers
- Truck and trailer combinations
- Livestock carriers
- Flatbed trucks towing a trailer
- Tanker trucks towing a trailer
- Dump trucks towing a trailer
- Logging trucks towing a trailer
It is important to note that operating these types of vehicles requires additional knowledge, skills, and training beyond what is required for a regular driver's license. It is important to follow all traffic laws and safety guidelines to maintain your CDL license and ensure the safety of yourself and others on the road.
Some examples of vehicles you can operate with a Class A CDL license include:
- Tractor-trailers
- Truck and trailer combinations
- Livestock carriers
- Flatbed trucks towing a trailer
- Tanker trucks towing a trailer
- Dump trucks towing a trailer
- Logging trucks towing a trailer
It is important to note that operating these types of vehicles requires additional knowledge, skills, and training beyond what is required for a regular driver's license. It is important to follow all traffic laws and safety guidelines to maintain your CDL license and ensure the safety of yourself and others on the road.
To obtain a Class A CDL license in Oklahoma, you must meet the following requirements:
1. Be at least 18 years of age to drive within the state of Oklahoma and 21 years of age to drive interstate or transport hazardous materials.
2. Have a valid Oklahoma driver's license.
3. Provide proof of identity and residency in Oklahoma.
4. Pass a Department of Transportation (DOT) physical exam to ensure that you meet medical and physical qualifications for operating a commercial vehicle.
5. Pass a written knowledge test that covers topics such as vehicle inspection, safe driving practices, and transporting cargo.
6. Obtain a Commercial Learner's Permit (CLP) by passing the CDL general knowledge test and any endorsements required for your desired type of driving.
7. Complete behind-the-wheel training with a qualified instructor to prepare for the skills test.
8. Pass a skills test that includes a pre-trip inspection, basic control skills, and an on-road driving test.
9. Pay the required fees for obtaining your CDL license and any endorsements.
It is important to note that some types of driving require additional endorsements on your CDL, such as hazardous materials, passenger transport, or double/triple trailers. These endorsements will require additional testing and training beyond the basic Class A CDL requirements.
1. Be at least 18 years of age to drive within the state of Oklahoma and 21 years of age to drive interstate or transport hazardous materials.
2. Have a valid Oklahoma driver's license.
3. Provide proof of identity and residency in Oklahoma.
4. Pass a Department of Transportation (DOT) physical exam to ensure that you meet medical and physical qualifications for operating a commercial vehicle.
5. Pass a written knowledge test that covers topics such as vehicle inspection, safe driving practices, and transporting cargo.
6. Obtain a Commercial Learner's Permit (CLP) by passing the CDL general knowledge test and any endorsements required for your desired type of driving.
7. Complete behind-the-wheel training with a qualified instructor to prepare for the skills test.
8. Pass a skills test that includes a pre-trip inspection, basic control skills, and an on-road driving test.
9. Pay the required fees for obtaining your CDL license and any endorsements.
It is important to note that some types of driving require additional endorsements on your CDL, such as hazardous materials, passenger transport, or double/triple trailers. These endorsements will require additional testing and training beyond the basic Class A CDL requirements.
The minimum age requirement for obtaining a Class A CDL license in Oklahoma is 18 years old to drive within the state of Oklahoma. However, to drive interstate or transport hazardous materials, you must be at least 21 years old.
It is important to note that some employers may have their own age requirements that exceed the minimum legal age. Additionally, some endorsements for a CDL (such as passenger transport or hazardous materials) may also have age requirements that exceed the minimum legal age. It is important to check with your state's Department of Motor Vehicles and any potential employers to determine the specific age requirements for your desired type of driving.
It is important to note that some employers may have their own age requirements that exceed the minimum legal age. Additionally, some endorsements for a CDL (such as passenger transport or hazardous materials) may also have age requirements that exceed the minimum legal age. It is important to check with your state's Department of Motor Vehicles and any potential employers to determine the specific age requirements for your desired type of driving.
The endorsements required for a Class A CDL license depend on the type of driving you plan to do.
The following are some of the common endorsements for a Class A CDL:
1. Doubles/Triples (T) Endorsement: Required to drive vehicles with multiple trailers, such as double or triple trailers.
2. Tanker (N) Endorsement: Required to drive vehicles designed to transport liquids or gases in bulk containers.
3. Hazardous Materials (H) Endorsement: Required to transport hazardous materials as defined by the Department of Transportation.
4. Passenger (P) Endorsement: Required to transport passengers in a commercial vehicle, such as a bus.
To obtain an endorsement, you will need to pass a written knowledge test and any additional skills test required for that endorsement. You will also need to meet any additional requirements, such as specific age or experience requirements. It is important to check with your state's Department of Motor Vehicles for specific information on obtaining endorsements for a Class A CDL license.
The following are some of the common endorsements for a Class A CDL:
1. Doubles/Triples (T) Endorsement: Required to drive vehicles with multiple trailers, such as double or triple trailers.
2. Tanker (N) Endorsement: Required to drive vehicles designed to transport liquids or gases in bulk containers.
3. Hazardous Materials (H) Endorsement: Required to transport hazardous materials as defined by the Department of Transportation.
4. Passenger (P) Endorsement: Required to transport passengers in a commercial vehicle, such as a bus.
To obtain an endorsement, you will need to pass a written knowledge test and any additional skills test required for that endorsement. You will also need to meet any additional requirements, such as specific age or experience requirements. It is important to check with your state's Department of Motor Vehicles for specific information on obtaining endorsements for a Class A CDL license.
The Class A CDL skills test is designed to assess your ability to safely operate a commercial motor vehicle. It consists of three parts: the pre-trip inspection, the basic vehicle control skills test, and the on-road driving test.
1. Pre-trip inspection: This portion of the test requires you to show that you can inspect your vehicle to ensure that it is safe to operate. You will need to identify and explain the items you are inspecting, such as brakes, suspension, lights, and tires.
2. Basic vehicle control skills test: This portion of the test requires you to show that you can safely maneuver your vehicle in a controlled environment. You will need to perform several maneuvers, such as straight line backing, offset backing, and parallel parking.
3. On-road driving test: This portion of the test requires you to demonstrate your ability to safely operate your vehicle on public roads. You will need to navigate through traffic and demonstrate your ability to perform basic driving maneuvers, such as turning and merging.
It is important to note that specific requirements for the skills test may vary depending on the state where you are taking the test. It is recommended that you check with your state's Department of Motor Vehicles for specific information on the Class A CDL skills test in your area.
1. Pre-trip inspection: This portion of the test requires you to show that you can inspect your vehicle to ensure that it is safe to operate. You will need to identify and explain the items you are inspecting, such as brakes, suspension, lights, and tires.
2. Basic vehicle control skills test: This portion of the test requires you to show that you can safely maneuver your vehicle in a controlled environment. You will need to perform several maneuvers, such as straight line backing, offset backing, and parallel parking.
3. On-road driving test: This portion of the test requires you to demonstrate your ability to safely operate your vehicle on public roads. You will need to navigate through traffic and demonstrate your ability to perform basic driving maneuvers, such as turning and merging.
It is important to note that specific requirements for the skills test may vary depending on the state where you are taking the test. It is recommended that you check with your state's Department of Motor Vehicles for specific information on the Class A CDL skills test in your area.
Yes, there are restrictions and limitations for drivers with a Class A CDL license. Some of the common restrictions and limitations include:
1. Air brake restriction: If you do not pass the air brake knowledge test or fail to demonstrate proficiency in operating a vehicle with air brakes during the skills test, you may be restricted from operating vehicles with air brakes.
2. Automatic transmission restriction: If you take the skills test in a vehicle with an automatic transmission, you will be restricted from operating vehicles with manual transmissions.
3. Hazardous materials endorsement restriction: If you do not pass the hazardous materials knowledge test or do not meet other requirements for the endorsement, you will be restricted from transporting hazardous materials.
4. Passenger endorsement restriction: If you do not pass the passenger endorsement knowledge test or do not meet other requirements for the endorsement, you will be restricted from transporting passengers.
It is important to note that restrictions and limitations may vary depending on the state where you obtained your CDL license. It is recommended that you check with your state's Department of Motor Vehicles for specific information on restrictions and limitations for drivers with a Class A CDL license in your area.
1. Air brake restriction: If you do not pass the air brake knowledge test or fail to demonstrate proficiency in operating a vehicle with air brakes during the skills test, you may be restricted from operating vehicles with air brakes.
2. Automatic transmission restriction: If you take the skills test in a vehicle with an automatic transmission, you will be restricted from operating vehicles with manual transmissions.
3. Hazardous materials endorsement restriction: If you do not pass the hazardous materials knowledge test or do not meet other requirements for the endorsement, you will be restricted from transporting hazardous materials.
4. Passenger endorsement restriction: If you do not pass the passenger endorsement knowledge test or do not meet other requirements for the endorsement, you will be restricted from transporting passengers.
It is important to note that restrictions and limitations may vary depending on the state where you obtained your CDL license. It is recommended that you check with your state's Department of Motor Vehicles for specific information on restrictions and limitations for drivers with a Class A CDL license in your area.
It depends on the individual state's policies and regulations on language translations for CDL exams. In Oklahoma, for example, the CDL written test is only available in English and the applicant must be able to read and write in English. However, some states may offer the CDL written test in other languages or provide an interpreter if necessary. It is recommended that you check with your state's Department of Motor Vehicles for specific information on language translations for CDL exams in your area.
Yes, you can request accommodations for the Class A CDL written test due to a disability. Under the Americans with Disabilities Act (ADA), the Department of Motor Vehicles (DMV) is required to provide reasonable accommodations to individuals with disabilities taking the CDL exam.
To request accommodations, you will need to contact your state's DMV and provide documentation of your disability and the accommodations you are requesting. The DMV will review your request and determine if the accommodations are reasonable and appropriate.
Some examples of accommodations that may be provided include extra time to complete the exam, a reader or scribe, or a separate testing room. It is important to make your request for accommodations well in advance of your scheduled exam date, as the DMV may need time to arrange for the necessary accommodations.
Remember that each state has its own policies and procedures for requesting accommodations, so it's important to contact your state's DMV for specific information on how to request accommodations for the CDL written test.
To request accommodations, you will need to contact your state's DMV and provide documentation of your disability and the accommodations you are requesting. The DMV will review your request and determine if the accommodations are reasonable and appropriate.
Some examples of accommodations that may be provided include extra time to complete the exam, a reader or scribe, or a separate testing room. It is important to make your request for accommodations well in advance of your scheduled exam date, as the DMV may need time to arrange for the necessary accommodations.
Remember that each state has its own policies and procedures for requesting accommodations, so it's important to contact your state's DMV for specific information on how to request accommodations for the CDL written test.
If you fail the Class A CDL written test, you will be allowed to retake the test after a certain waiting period. In Oklahoma, for example, you are allowed to retake the test the next business day.
The waiting period between retakes may vary depending on your state's policies. It is important to note that there may be a maximum number of times you can retake the test within a certain period of time.
If you fail the written test multiple times, you may be required to complete additional training or education before being allowed to retake the test again. It is important to review the study materials and practice tests before retaking the exam to increase your chances of passing.
Be sure to follow your state's specific policies and procedures for retaking the CDL written exam.
The waiting period between retakes may vary depending on your state's policies. It is important to note that there may be a maximum number of times you can retake the test within a certain period of time.
If you fail the written test multiple times, you may be required to complete additional training or education before being allowed to retake the test again. It is important to review the study materials and practice tests before retaking the exam to increase your chances of passing.
Be sure to follow your state's specific policies and procedures for retaking the CDL written exam.
