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.
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Frequently Asked Questions
A Class A CDL license in Missouri is a commercial driver's license that allows the holder to operate a combination of vehicles with a total weight of 26,001 pounds or more. This includes vehicles with a towed unit weighing more than 10,000 pounds. Examples of vehicles that can be driven with a Class A CDL include tractor-trailers, tanker trucks, and livestock carriers.
To obtain a Class A CDL license in Missouri, applicants must pass a written knowledge test, a skills test, and a medical examination. They must also meet certain age and residency requirements and have a valid driver's license. It is important to note that there may be additional endorsements or restrictions required depending on the specific type of vehicle being operated.
To obtain a Class A CDL license in Missouri, applicants must pass a written knowledge test, a skills test, and a medical examination. They must also meet certain age and residency requirements and have a valid driver's license. It is important to note that there may be additional endorsements or restrictions required depending on the specific type of vehicle being operated.
With a Class A CDL license in Missouri, you are authorized to operate combination vehicles with a total weight of 26,001 pounds or more. This includes:
- Tractor-trailers: A combination of a truck tractor and one or more trailers or semitrailers.
- Livestock carriers: A combination of a truck tractor and one or more trailers used to transport live animals.
- Tanker trucks: A combination of a truck tractor and one or more tank trailers or semitrailers used to transport liquids or gases.
- Flatbeds: A combination of a truck tractor and one or more flatbed trailers or semitrailers used to transport large or heavy cargo that cannot be easily loaded into an enclosed trailer.
It's important to note that there may be additional endorsements or restrictions required depending on the specific type of vehicle being operated. For example, if you want to operate a tanker truck carrying hazardous materials, you may need to obtain a hazardous materials endorsement.
- Tractor-trailers: A combination of a truck tractor and one or more trailers or semitrailers.
- Livestock carriers: A combination of a truck tractor and one or more trailers used to transport live animals.
- Tanker trucks: A combination of a truck tractor and one or more tank trailers or semitrailers used to transport liquids or gases.
- Flatbeds: A combination of a truck tractor and one or more flatbed trailers or semitrailers used to transport large or heavy cargo that cannot be easily loaded into an enclosed trailer.
It's important to note that there may be additional endorsements or restrictions required depending on the specific type of vehicle being operated. For example, if you want to operate a tanker truck carrying hazardous materials, you may need to obtain a hazardous materials endorsement.
To obtain a Class A CDL license in Missouri, you must meet the following requirements:
1. Age: You must be at least 18 years old to obtain a Class A CDL license in Missouri. However, if you plan to operate a commercial vehicle across state lines or transport hazardous materials, you must be at least 21 years old.
2. Residency: You must be a resident of Missouri or provide documentation showing that you are authorized to work in the United States.
3. Driver's License: You must have a valid Missouri driver's license. If you have a commercial learner's permit (CLP), you must hold it for 14 days before taking your skills test.
4. Medical Examination: You must pass a medical examination by a licensed medical examiner and obtain a Medical Examiner's Certificate.
5. Knowledge Test: You must pass a written knowledge test consisting of multiple-choice questions related to commercial driving regulations and procedures.
6. Skills Test: You must pass a skills test that includes a pre-trip inspection, basic vehicle control, and on-road driving.
7. Fees: You must pay the appropriate fees for your CDL license and any endorsements or restrictions that you may need.
It's important to note that there may be additional requirements depending on the specific type of vehicle or cargo you plan to transport with your Class A CDL license.
1. Age: You must be at least 18 years old to obtain a Class A CDL license in Missouri. However, if you plan to operate a commercial vehicle across state lines or transport hazardous materials, you must be at least 21 years old.
2. Residency: You must be a resident of Missouri or provide documentation showing that you are authorized to work in the United States.
3. Driver's License: You must have a valid Missouri driver's license. If you have a commercial learner's permit (CLP), you must hold it for 14 days before taking your skills test.
4. Medical Examination: You must pass a medical examination by a licensed medical examiner and obtain a Medical Examiner's Certificate.
5. Knowledge Test: You must pass a written knowledge test consisting of multiple-choice questions related to commercial driving regulations and procedures.
6. Skills Test: You must pass a skills test that includes a pre-trip inspection, basic vehicle control, and on-road driving.
7. Fees: You must pay the appropriate fees for your CDL license and any endorsements or restrictions that you may need.
It's important to note that there may be additional requirements depending on the specific type of vehicle or cargo you plan to transport with your Class A CDL license.
In Missouri, the minimum age requirement to obtain a Class A CDL license is 18 years old. However, if you plan to operate a commercial vehicle across state lines or transport hazardous materials, you must be at least 21 years old. Additionally, some employers may have their own age requirements for hiring commercial drivers, so it's important to check with the specific company you are interested in working for.
Whether or not you need any endorsements on your Class A CDL license depends on the type of cargo you plan to transport. In Missouri, the following endorsements are available:
1. H Endorsement: Required for drivers who transport hazardous materials.
2. N Endorsement: Required for drivers who transport tank vehicles.
3. P Endorsement: Required for drivers who operate a vehicle carrying passengers, such as a bus or van.
4. S Endorsement: Required for drivers who operate a school bus.
5. T Endorsement: Required for drivers who tow double or triple trailers.
It's important to note that some endorsements may require additional knowledge and skills tests, as well as background checks or fingerprinting. Additionally, some employers may require additional endorsements beyond what is required by law for their particular operations.
1. H Endorsement: Required for drivers who transport hazardous materials.
2. N Endorsement: Required for drivers who transport tank vehicles.
3. P Endorsement: Required for drivers who operate a vehicle carrying passengers, such as a bus or van.
4. S Endorsement: Required for drivers who operate a school bus.
5. T Endorsement: Required for drivers who tow double or triple trailers.
It's important to note that some endorsements may require additional knowledge and skills tests, as well as background checks or fingerprinting. Additionally, some employers may require additional endorsements beyond what is required by law for their particular operations.
The Class A CDL skills test in Missouri is broken down into three parts:
1. Pre-Trip Inspection: You will be tested on your ability to perform a thorough inspection of your commercial vehicle and identify any potential safety hazards or mechanical issues.
2. Basic Vehicle Control: You will be tested on your ability to control the vehicle in various situations, such as backing up, turning, and maneuvering in tight spaces.
3. On-Road Driving: You will be tested on your ability to safely operate the vehicle in real-world driving situations, such as merging onto highways, changing lanes, and making turns.
Each of these parts of the skills test will be graded on a pass/fail basis, and you must pass all three parts in order to obtain your Class A CDL license. It's important to note that the skills test is typically conducted in a larger commercial vehicle than what is used for the Class B CDL skills test.
1. Pre-Trip Inspection: You will be tested on your ability to perform a thorough inspection of your commercial vehicle and identify any potential safety hazards or mechanical issues.
2. Basic Vehicle Control: You will be tested on your ability to control the vehicle in various situations, such as backing up, turning, and maneuvering in tight spaces.
3. On-Road Driving: You will be tested on your ability to safely operate the vehicle in real-world driving situations, such as merging onto highways, changing lanes, and making turns.
Each of these parts of the skills test will be graded on a pass/fail basis, and you must pass all three parts in order to obtain your Class A CDL license. It's important to note that the skills test is typically conducted in a larger commercial vehicle than what is used for the Class B CDL skills test.
Yes, there are some restrictions or limitations that apply to drivers with a Class A CDL license in Missouri. Here are some examples:
1. Weight Restrictions: Depending on the type of vehicle and cargo you are carrying, there may be weight restrictions that apply. For example, if you are carrying hazardous materials, you may be limited to a certain weight.
2. Endorsement Requirements: As I mentioned earlier, depending on the type of cargo you plan to transport, you may need to obtain specific endorsements on your CDL license.
3. Time Restrictions: There may be time restrictions that apply to when and how long you can operate a commercial vehicle. For example, there are federal regulations that limit the number of hours a driver can be on duty in a given day or week.
4. Age Restrictions: In Missouri, you must be at least 18 years old to obtain a Class A CDL license, but there are some restrictions on the type of vehicles you can operate until you turn 21.
5. Medical Certification: You must undergo a medical examination and obtain a medical certificate in order to obtain or renew your CDL license. The certificate must be renewed periodically.
It's important to follow all regulations and restrictions that apply to your CDL license in order to ensure your safety and the safety of others on the road.
1. Weight Restrictions: Depending on the type of vehicle and cargo you are carrying, there may be weight restrictions that apply. For example, if you are carrying hazardous materials, you may be limited to a certain weight.
2. Endorsement Requirements: As I mentioned earlier, depending on the type of cargo you plan to transport, you may need to obtain specific endorsements on your CDL license.
3. Time Restrictions: There may be time restrictions that apply to when and how long you can operate a commercial vehicle. For example, there are federal regulations that limit the number of hours a driver can be on duty in a given day or week.
4. Age Restrictions: In Missouri, you must be at least 18 years old to obtain a Class A CDL license, but there are some restrictions on the type of vehicles you can operate until you turn 21.
5. Medical Certification: You must undergo a medical examination and obtain a medical certificate in order to obtain or renew your CDL license. The certificate must be renewed periodically.
It's important to follow all regulations and restrictions that apply to your CDL license in order to ensure your safety and the safety of others on the road.
No, in Missouri, the Class A CDL written test is only available in English. According to the Missouri Department of Revenue, all applicants must be able to read and understand English in order to take the test and obtain a commercial driver's license. This is because the test measures your knowledge of laws, rules, and regulations related to driving commercial vehicles in the United States, and these laws are written in English. However, you can bring a translator with you to help you understand the instructions and questions on the test. The translator must be fluent in both English and your preferred language, and they must be approved by the testing center where you are taking the test. Additionally, if you need special accommodations due to a disability or other condition that affects your ability to take the test, you should contact the testing center ahead of time to make arrangements.
Yes, you can request accommodations for the Class A CDL written test if you have a disability that affects your ability to take the test under standard conditions. According to the Missouri Department of Revenue, accommodations may include things like extended time, separate testing rooms, and assistive technology such as screen readers or magnifiers.
To request accommodations, you will need to fill out a Request for Accommodations form and provide documentation of your disability from a licensed healthcare professional. The form and documentation should be submitted to the Missouri Department of Revenue's Disability Services Coordinator at least 30 days before your scheduled test date.
Once your request is received and reviewed, the Disability Services Coordinator will work with you and the testing center to arrange for appropriate accommodations. It's important to note that accommodations are not guaranteed and may not be possible in all cases. Therefore, it's recommended that you submit your request as early as possible to allow time for review and coordination of accommodations.
To request accommodations, you will need to fill out a Request for Accommodations form and provide documentation of your disability from a licensed healthcare professional. The form and documentation should be submitted to the Missouri Department of Revenue's Disability Services Coordinator at least 30 days before your scheduled test date.
Once your request is received and reviewed, the Disability Services Coordinator will work with you and the testing center to arrange for appropriate accommodations. It's important to note that accommodations are not guaranteed and may not be possible in all cases. Therefore, it's recommended that you submit your request as early as possible to allow time for review and coordination of accommodations.
Yes, if you fail the Class A CDL written test in Missouri, you may retake the test. However, there are certain restrictions on how soon you can retake the test and how many times you can take it.
According to the Missouri Department of Revenue, if you fail the Class A CDL written test, you must wait at least one day before taking it again. If you fail the test three times within a 30-day period, you will not be allowed to take the test again until at least 30 days have passed since your last attempt.
It's important to note that each time you take the test, you will be required to pay a fee. Therefore, it's recommended that you study and prepare thoroughly before taking the test to avoid having to retake it multiple times.
If you continue to have difficulty passing the written test after multiple attempts, it may be helpful to seek additional study materials or consider enrolling in a commercial driver's license training program to improve your knowledge and skills.
According to the Missouri Department of Revenue, if you fail the Class A CDL written test, you must wait at least one day before taking it again. If you fail the test three times within a 30-day period, you will not be allowed to take the test again until at least 30 days have passed since your last attempt.
It's important to note that each time you take the test, you will be required to pay a fee. Therefore, it's recommended that you study and prepare thoroughly before taking the test to avoid having to retake it multiple times.
If you continue to have difficulty passing the written test after multiple attempts, it may be helpful to seek additional study materials or consider enrolling in a commercial driver's license training program to improve your knowledge and skills.
