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
43. When transporting a load, you should inspect the cargo:
Explanation
Cargo and its securement must be inspected every time you take a break during a trip. Be sure to inspect the cargo at least every 150 miles.
44. If a worker is present in a work zone, you should:
Explanation
When driving through a work zone, follow the posted speed limits. If workers are present, you should slow to a speed that is even lower than the posted limit.
45. Cargo with a high center of gravity:
Explanation
Cargo with a high center of gravity makes a vehicle more likely to tip over than cargo with a low center of gravity. For this reason, it is important that the weight of cargo be distributed as low as possible.
46. Before driving a vehicle with air brakes, you should ensure that the ____ come on automatically when air pressure falls below 45 psi.
Explanation
Before driving a vehicle with air brakes, you should ensure that the spring brakes come on automatically when air tank pressure falls to a level between 20 and 45 psi. You can do this by chocking the wheels and releasing air from the braking system by stepping on and off the brake pedal. Once the pressure levels drop to an unsafe level, the parking brake valve should pop out and spring brakes should come on.
47. Dual tires should:
Explanation
When inspecting a vehicle, you should verify that your dual tires do not come into contact with one another, or with any other part of the vehicle.
48. A broken exhaust system:
Explanation
A broken exhaust system can let poisonous fumes into a vehicle's cab or sleeper berth. Be sure to inspect your exhaust system for any loose, broken, or missing parts.
49. By beginning a left turn before reaching the center of an intersection, you:
Explanation
When planning to turn left at an intersection, make sure you have reached the center of the intersection before beginning the turn. If you turn too soon, off-tracking may cause the left side of your vehicle to hit another vehicle.
50. Shortly after a tire has been changed, you should:
Explanation
After a tire has been changed, you should stop a short while later to recheck the tightness of the lug nuts.
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.
