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 or four possible answer choices. Test questions come from the Mississippi Professional 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.
1. If using the spring brakes while hauling a heavy load, a complete stop will:
Spring brakes will activate in a vehicle with air brakes if the pressure in the air system becomes too low. A heavily loaded vehicle will take a long time to stop when using only the spring brakes because the spring brakes do not work on all axles.
2. In a dual air brake system:
Most heavy-duty vehicles use dual air brake systems. A dual air brake system consists of two separate air brake systems, connected by a single set of brake controls. Each system has its own air tanks.
3. The air compressor is connected to the:
The air compressor of an air brake system is connected to the engine through gears or a v-belt. The compressor may be air-cooled or cooled by the engine cooling system.
4. A CMV should:
All commercial motor vehicles are required to be equipped with the proper emergency equipment. This may include spare electrical fuses; three red reflective triangles, six fuses, or three liquid burning flares; and at least one properly charged and rated fire extinguisher.
5. Which of the following is not a part of an air brake system?
Air brakes consists of three separate braking systems: the service brake system, the parking brake system, and the emergency brake system.
6. Leaking shock absorbers:
The suspension system keeps a vehicle's axles in place. Damaged suspension parts, such as leaking shock absorbers, may be potentially dangerous defects on a vehicle.
7. When driving through a curve during the skills test, you should:
When approaching a curve during the on-road driving skills test, you must reduce your speed sufficiently before entering the curve so that you do not need to further brake or shift in the curve. Keep the vehicle in its lane and continue to check for traffic in all directions.
Frequently Asked Questions
To obtain a Class A CDL license in Mississippi, you must first pass a series of written knowledge tests and a skills test, which includes a pre-trip inspection, basic vehicle control, and an on-road driving test. You must also be at least 18 years old (21 years old to operate interstate), have a valid driver's license, and pass a medical examination to ensure you are physically fit to operate a commercial vehicle.
Additionally, you may need to obtain endorsements for certain types of cargo or specialized equipment you may be hauling. These endorsements require additional written tests and/or skills tests.
It's important to note that operating a commercial vehicle without the proper license and endorsements is illegal and can result in fines, suspension or revocation of your driver's license, and even criminal charges in some cases.
1. Tractor-trailers: These are vehicles that consist of a tractor unit (the front part of the vehicle that contains the engine and driver's cab) and a semi-trailer (the back part of the vehicle that carries cargo). The total weight of the vehicle and trailer must be more than 26,001 pounds.
2. Tanker trucks: These are vehicles that carry liquids such as gasoline, milk, or chemicals in large tanks. Tanker trucks can be single or double trailers and must have a total weight of more than 26,001 pounds.
3. Flatbed trucks with trailers: These are vehicles that have an open bed for carrying cargo and are typically used for hauling heavy equipment or construction materials. The total weight of the vehicle and trailer must be more than 26,001 pounds.
It's important to note that you may need additional endorsements to operate certain types of vehicles or carry certain types of cargo, such as hazardous materials or double/triple trailers.
1. Minimum age: You must be at least 18 years old to obtain a Class A CDL license in Mississippi. However, you must be at least 21 years old to operate a commercial vehicle across state lines or transport hazardous materials.
2. Valid driver's license: You must have a valid driver's license issued by the state of Mississippi.
3. Medical examination: You must pass a medical examination to ensure that you are physically fit to operate a commercial vehicle.
4. Written knowledge tests: You must pass a series of written knowledge tests that cover topics such as vehicle inspection, basic control skills, and on-road driving. These tests are designed to ensure that you have a thorough understanding of the rules and regulations related to commercial driving.
5. Skills test: You must pass a skills test that includes a pre-trip inspection, basic vehicle control, and an on-road driving test. This test is designed to assess your ability to safely operate a commercial vehicle.
6. Endorsements: Depending on the type of cargo or specialized equipment you plan to haul, you may need additional endorsements on your CDL, such as hazardous materials or double/triple trailers.
It's important to note that obtaining a Class A CDL license requires significant time and effort, including practice time behind the wheel of a commercial vehicle. Additionally, you must maintain your CDL by following all rules and regulations related to commercial driving and complying with any applicable medical requirements.
If you are 18 to 20 years old, you can only operate commercial vehicles within the state of Mississippi. You cannot operate a commercial vehicle across state lines or transport hazardous materials.
If you are 21 years old or older, there are no restrictions on the type of commercial vehicle you can operate or the type of cargo you can transport.
However, it's important to note that some employers may have their own age requirements for hiring commercial drivers. Additionally, some endorsements on your CDL may require you to be at least 21 years old, even if you have a Class A CDL license.
Here are the most common endorsements for a Class A CDL in Mississippi:
1. Hazmat endorsement: This endorsement is required if you plan to transport hazardous materials. To obtain this endorsement, you must pass a written test and a security background check.
2. Tanker endorsement: This endorsement is required if you plan to transport liquids or gases in bulk containers. To obtain this endorsement, you must pass a skills test.
3. Double/triple trailer endorsement: This endorsement is required if you plan to operate a combination of two or three trailers. To obtain this endorsement, you must pass a skills test.
4. Passenger endorsement: This endorsement is required if you plan to transport passengers for hire, such as on a bus or shuttle. To obtain this endorsement, you must pass a skills test and a written test.
It's important to note that some employers may require additional endorsements or certifications beyond those required by the state of Mississippi. Be sure to check with your employer or potential employers to determine their specific requirements.
1. Pre-trip inspection: This portion of the test requires you to show the examiner that you can perform a thorough inspection of your vehicle before driving it. You'll need to identify and explain any potential safety hazards and demonstrate how you would fix any issues.
2. Basic control skills: This portion of the test requires you to demonstrate your ability to control your vehicle in tight spaces, such as backing up, turning, and parking. You'll need to perform maneuvers such as straight-line backing, offset backing, and parallel parking.
3. On-road driving: This portion of the test requires you to demonstrate your ability to safely operate your vehicle on public roads and highways. You'll need to show that you can properly start and stop your vehicle, shift gears smoothly, obey traffic signals and signs, and navigate through different types of traffic situations.
The skills test is typically conducted in a large vehicle provided by the testing facility, such as a tractor-trailer combination. You will be required to bring your own valid driver's license, proof of insurance for the vehicle you will use during the test and any necessary endorsements for the type of vehicle or cargo you plan to transport.
It's important to note that passing the skills test is just one step in obtaining your Class A CDL license. You will also need to pass a written knowledge test and meet any other requirements set by the Mississippi Department of Public Safety.
Here are some of the most common restrictions and limitations:
1. Age restrictions: To obtain a Class A CDL in Mississippi, you must be at least 18 years old. However, if you plan to transport hazardous materials or operate a commercial vehicle across state lines, you must be at least 21 years old.
2. Endorsement restrictions: If you have certain endorsements on your Class A CDL, such as a hazmat endorsement or passenger endorsement, you may be subject to additional restrictions or requirements.
3. Vehicle-specific restrictions: Depending on the type of vehicle you plan to operate, there may be specific weight and length restrictions that apply.
4. Hours of service limitations: As a commercial driver, you are subject to federal hours-of-service regulations that limit the amount of time you can drive each day and week.
5. Medical certification requirements: To maintain your Class A CDL license, you must pass regular physical exams and meet certain medical standards.
It's important to follow all restrictions and limitations placed on your Class A CDL license, as failure to do so can result in fines, penalties, or even the suspension or revocation of your license.
However, if you have difficulty reading or understanding English, you may be able to request an interpreter or translator to assist you during the test. The Mississippi Department of Public Safety may also provide study materials and resources in other languages to help you prepare for the test.
It's important to note that being able to speak, read, and understand English is a requirement for obtaining a Class A CDL license in Mississippi. This is because commercial drivers must be able to communicate effectively with other drivers, law enforcement officers, and other personnel involved in the transportation industry.
According to the Americans with Disabilities Act (ADA), individuals with disabilities are entitled to reasonable accommodations to ensure equal access to programs and services. Reasonable accommodations may include, but are not limited to, extra testing time, a reader or sign language interpreter, or a special testing location.
To request accommodations for the Class A CDL written test due to a disability, you will need to contact the Mississippi Department of Public Safety's Driver Services Bureau and provide documentation of your disability and the specific accommodations you are requesting. They may also require additional information or evaluations from your healthcare provider.
It's important to note that requests for accommodations must be made in advance of the exam in order for the Mississippi Department of Public Safety to provide appropriate assistance.
The number of times you can retake the written test may vary depending on the policies of the Mississippi Department of Public Safety. It's recommended that you study and prepare thoroughly before retaking the test to increase your chances of passing.
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. This may include attending a commercial driver training course or studying additional materials provided by the Mississippi Department of Public Safety.
It's important to note that passing the Class A CDL written test is only one step in obtaining a commercial driver's license in Mississippi. You will also need to pass a skills test, which includes a pre-trip inspection, a basic vehicle control test, and an on-road driving test.