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 Missouri Commercial Driver’s 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
1. When starting an engine:
Explanation
After a vehicle is started, the warning lights and buzzers should go out after a few seconds. If the warning signals do not turn off, there may be something wrong with the vehicle.
2. Which of the following is not a good rule when using turn signals?
Explanation
When using your turn signals, you should signal well before the turn or lane change, signal continuously throughout the turn or lane change, and cancel the signal after you have completed your move.
3. Air brakes use ____ to function.
Explanation
Air brakes function through the use of compressed air.
4. When driving a vehicle equipped with an Anti-Lock Braking System (ABS), you should:
Explanation
Drivers of vehicles equipped with ABS and drivers of vehicles without ABS should brake in relatively the same manner. When ABS is working properly, it automatically applies when brakes are applied in situations that may create lockup.
5. Brake linings should be:
Explanation
Brake linings should not be loose or soaked with oil or grease. They shouldn't be dangerously thin.
6. Hydroplaning happens most often when:
Explanation
Hydroplaning is most likely to occur when driving on wet roads with tire pressure that is too low and tire tread that is too worn. If there is enough water on the road, hydroplaning can occur at speeds as low as 30 mph.
7. When loading a trailer, it is important to:
Explanation
A load of cargo must be properly balanced. Placing too much weight over an axle can damage the axle and make it more difficult for you to steer. Placing too little weight over an axle can cause poor traction, also leading to difficult handling.
Frequently Asked Questions
A Class A CDL (Commercial Driver's License) in Missouri allows a person to operate a combination of vehicles with a total weight of 26,001 pounds or more, provided that the vehicle being towed weighs more than 10,000 pounds. This type of license is required for drivers who operate tractor-trailers, semi-trucks, and other large commercial vehicles. To obtain a Class A CDL in Missouri, a person must pass a written test and a driving skills test specific to this type of license. Additionally, the driver must meet certain medical and physical requirements and pass a background check.
With a Class A CDL license in Missouri, you can operate combination vehicles with a total weight of 26,001 pounds or more, provided that the vehicle being towed weighs more than 10,000 pounds. Examples of vehicles you can operate with a Class A CDL include:
- Tractor-trailers
- Semi-trucks
- Big-rigs
- Flatbed trucks with trailers
- Tanker trucks with trailers
- Livestock carriers with trailers
- Double and triple trailers
It is important to note that each type of vehicle may require specific endorsements or additional certifications. For example, to transport hazardous materials, you would need to obtain a Hazmat endorsement in addition to your Class A CDL license.
- Tractor-trailers
- Semi-trucks
- Big-rigs
- Flatbed trucks with trailers
- Tanker trucks with trailers
- Livestock carriers with trailers
- Double and triple trailers
It is important to note that each type of vehicle may require specific endorsements or additional certifications. For example, to transport hazardous materials, you would need to obtain a Hazmat endorsement in addition to your Class A CDL license.
In Missouri, to obtain a Class A CDL license, you must meet the following requirements:
1. Be at least 18 years old to obtain an intrastate CDL or 21 years old to obtain an interstate CDL.
2. Hold a valid Missouri driver's license.
3. Provide proof of lawful presence in the United States.
4. Provide a valid social security number.
5. Pass a Department of Transportation (DOT) physical exam and obtain a medical examiner's certificate.
6. Pass a written knowledge test specific to the Class A CDL license.
7. Obtain a Commercial Learner's Permit (CLP) by passing a general knowledge test and any applicable endorsement tests.
8. Complete behind-the-wheel training with a qualified CDL instructor or through an approved training program.
9. Pass a driving skills test in the specific type of vehicle you will be driving with your Class A CDL license.
It is important to note that additional endorsements may be required for certain vehicles or types of cargo, such as hazardous materials or passenger transportation. Additionally, all applicants must pass a background check and provide a driving history record from all states where they have held a driver's license in the past 10 years.
1. Be at least 18 years old to obtain an intrastate CDL or 21 years old to obtain an interstate CDL.
2. Hold a valid Missouri driver's license.
3. Provide proof of lawful presence in the United States.
4. Provide a valid social security number.
5. Pass a Department of Transportation (DOT) physical exam and obtain a medical examiner's certificate.
6. Pass a written knowledge test specific to the Class A CDL license.
7. Obtain a Commercial Learner's Permit (CLP) by passing a general knowledge test and any applicable endorsement tests.
8. Complete behind-the-wheel training with a qualified CDL instructor or through an approved training program.
9. Pass a driving skills test in the specific type of vehicle you will be driving with your Class A CDL license.
It is important to note that additional endorsements may be required for certain vehicles or types of cargo, such as hazardous materials or passenger transportation. Additionally, all applicants must pass a background check and provide a driving history record from all states where they have held a driver's license in the past 10 years.
In Missouri, the minimum age requirement for a Class A CDL license is 18 years old for intrastate driving only. If you plan to drive across state lines (interstate driving), you must be at least 21 years old.
Yes, you may need additional endorsements for a Class A CDL license depending on the type of vehicle you plan to operate and the cargo you plan to haul. Some common endorsements include:
1. Hazmat endorsement (H) - required to transport hazardous materials
2. Tanker endorsement (N) - required to transport liquids or gases in bulk containers
3. Double/triple trailer endorsement (T) - required to tow two or three trailers at once
4. Passenger endorsement (P) - required to transport passengers in a vehicle designed to carry 16 or more people
In order to obtain an endorsement, you must pass a written knowledge test specific to that endorsement and meet any additional requirements, such as obtaining a TSA background check for the hazmat endorsement. It's important to note that endorsements may also have additional age requirements or restrictions.
1. Hazmat endorsement (H) - required to transport hazardous materials
2. Tanker endorsement (N) - required to transport liquids or gases in bulk containers
3. Double/triple trailer endorsement (T) - required to tow two or three trailers at once
4. Passenger endorsement (P) - required to transport passengers in a vehicle designed to carry 16 or more people
In order to obtain an endorsement, you must pass a written knowledge test specific to that endorsement and meet any additional requirements, such as obtaining a TSA background check for the hazmat endorsement. It's important to note that endorsements may also have additional age requirements or restrictions.
The Class A CDL skills test consists of three parts:
1. Pre-Trip Inspection: You will be asked to conduct an inspection of your vehicle to ensure that it is in safe operating condition. You will need to identify and explain the function of various parts and systems of the vehicle.
2. Basic Vehicle Control: You will be asked to demonstrate your ability to control the vehicle in various situations, such as backing up, turning, and parking.
3. On-Road Driving: You will be asked to drive the vehicle on public roads while demonstrating your ability to safely operate the vehicle and obey traffic laws.
Each part of the test is designed to assess your knowledge, skills, and ability to safely operate a commercial motor vehicle. It's important to note that the test must be taken in a vehicle that is representative of the type of commercial vehicle you plan to operate with your Class A CDL license, such as a tractor-trailer combination.
1. Pre-Trip Inspection: You will be asked to conduct an inspection of your vehicle to ensure that it is in safe operating condition. You will need to identify and explain the function of various parts and systems of the vehicle.
2. Basic Vehicle Control: You will be asked to demonstrate your ability to control the vehicle in various situations, such as backing up, turning, and parking.
3. On-Road Driving: You will be asked to drive the vehicle on public roads while demonstrating your ability to safely operate the vehicle and obey traffic laws.
Each part of the test is designed to assess your knowledge, skills, and ability to safely operate a commercial motor vehicle. It's important to note that the test must be taken in a vehicle that is representative of the type of commercial vehicle you plan to operate with your Class A CDL license, such as a tractor-trailer combination.
Yes, there are some restrictions or limitations for drivers with a Class A CDL license. Some common limitations include:
1. Air Brake Restriction: If you did not pass the air brakes knowledge and skills tests, you will have an air brake restriction placed on your license and will not be authorized to operate a vehicle equipped with air brakes.
2. Manual Transmission Restriction: If you took the skills test in a vehicle with an automatic transmission, you will have a restriction on your license that prohibits you from operating a vehicle with a manual transmission.
3. Hazmat Endorsement Restrictions: If you have a hazmat endorsement on your license, you may be subject to additional restrictions, such as restrictions on the types of materials you can transport, limitations on the quantity of materials you can transport, or restrictions on the routes you can take.
4. Intrastate Only Restriction: If you do not meet federal medical requirements or do not meet the minimum age requirement for interstate driving, you may be restricted to driving within the state of Missouri only.
It's important to understand and adhere to any restrictions or limitations on your Class A CDL license to avoid penalties or fines.
1. Air Brake Restriction: If you did not pass the air brakes knowledge and skills tests, you will have an air brake restriction placed on your license and will not be authorized to operate a vehicle equipped with air brakes.
2. Manual Transmission Restriction: If you took the skills test in a vehicle with an automatic transmission, you will have a restriction on your license that prohibits you from operating a vehicle with a manual transmission.
3. Hazmat Endorsement Restrictions: If you have a hazmat endorsement on your license, you may be subject to additional restrictions, such as restrictions on the types of materials you can transport, limitations on the quantity of materials you can transport, or restrictions on the routes you can take.
4. Intrastate Only Restriction: If you do not meet federal medical requirements or do not meet the minimum age requirement for interstate driving, you may be restricted to driving within the state of Missouri only.
It's important to understand and adhere to any restrictions or limitations on your Class A CDL license to avoid penalties or fines.
No, the Class A CDL written test in Missouri is currently only available in English. The Missouri Department of Revenue requires that all applicants be able to read and understand English in order to pass the written test. This is because the test questions and answers are only available in English and all road signs and traffic signals are also in English.
However, if you have difficulty reading or understanding English, you may be able to use an interpreter for the written test. You must provide your own interpreter and they must be fluent in both English and your preferred language. The interpreter must also sign an affidavit stating that they will accurately translate the test questions and answers.
It's important to note that if you use an interpreter for the written test, you will be required to take the driving skills test with a State Trooper who speaks English, as there are no interpreters allowed during the on-road portion of the CDL skills test.
However, if you have difficulty reading or understanding English, you may be able to use an interpreter for the written test. You must provide your own interpreter and they must be fluent in both English and your preferred language. The interpreter must also sign an affidavit stating that they will accurately translate the test questions and answers.
It's important to note that if you use an interpreter for the written test, you will be required to take the driving skills test with a State Trooper who speaks English, as there are no interpreters allowed during the on-road portion of the CDL skills test.
Yes, you can request accommodations for the Class A CDL written test in Missouri if you have a disability that may prevent you from taking the test under standard conditions. The Missouri Department of Revenue provides reasonable accommodations to ensure access to testing for individuals with disabilities under the Americans with Disabilities Act (ADA).
To request accommodations, you must submit a written request to the Missouri Department of Revenue's Driver License Bureau at least 30 days before your scheduled test date. The request must include documentation of your disability and a description of the specific accommodations you require.
Examples of accommodations that may be available include extended testing time, a separate testing room, or the use of assistive technology such as screen readers or magnifiers.
Once your request has been received and reviewed by the Missouri Department of Revenue, they will contact you to discuss your accommodations and make arrangements for your test. It's important to note that not all requests for accommodations may be granted, and reasonable alternatives may be suggested if the requested accommodation is not feasible.
To request accommodations, you must submit a written request to the Missouri Department of Revenue's Driver License Bureau at least 30 days before your scheduled test date. The request must include documentation of your disability and a description of the specific accommodations you require.
Examples of accommodations that may be available include extended testing time, a separate testing room, or the use of assistive technology such as screen readers or magnifiers.
Once your request has been received and reviewed by the Missouri Department of Revenue, they will contact you to discuss your accommodations and make arrangements for your test. It's important to note that not all requests for accommodations may be granted, and reasonable alternatives may be suggested if the requested accommodation is not feasible.
If you fail the Class A CDL written test in Missouri, you are allowed to retake the test. However, you must wait at least one day before taking it again. If you fail the test three times, you will be required to wait at least 7 days before taking it again.
Each time you take the written test, you will be charged a fee. Therefore, it's important to adequately prepare for the test to increase your chances of passing on your first attempt. You can find study materials, including the Missouri Commercial Driver License Manual, on the Missouri Department of Revenue's website.
If you fail the test multiple times or are having difficulty passing it, you may want to consider enrolling in a commercial driver's license training program. These programs can provide additional instruction and practice to help you pass the written test and prepare for the skills test.
Each time you take the written test, you will be charged a fee. Therefore, it's important to adequately prepare for the test to increase your chances of passing on your first attempt. You can find study materials, including the Missouri Commercial Driver License Manual, on the Missouri Department of Revenue's website.
If you fail the test multiple times or are having difficulty passing it, you may want to consider enrolling in a commercial driver's license training program. These programs can provide additional instruction and practice to help you pass the written test and prepare for the skills test.
