This endorsement is required if the driver will pull two or three trailers. To receive this endorsement, applicants must pass a test. The test consists of 20 multiple choice questions. To pass, the applicant must answer at least 16 questions correctly. Each question has three or four possible answer choices. Test questions come from the North Carolina Commercial Driver License Manual. Questions come from chapters covering: Driving Safely, Air Brakes (if applicable), Combination Vehicles and Doubles and Triples. The Double/Triple endorsement can be used with the Class A CDL.
1. Belts in the engine compartment should be:
When inspecting your vehicle's engine, check the belts for tightness and excessive wear. The amount of "give" that is safe for each belt in a given engine will vary, so learn what is appropriate for your vehicle.
2. Low underneath clearance can cause difficulties when driving:
Railroad-highway crossings may be difficult to cross if you are pulling a trailer with low underneath clearance. In particular, both low-slung units and single-axle tractors pulling long trailers are especially challenging to drive over raised crossings.
3. Once a coupling is completed, there should be:
When performing a visual check of coupling devices, you should make sure there is no space between the upper and lower fifth wheel. Ensure that the locking jaws are securely closed around the kingpin.
4. An open automobile window in cold weather may indicate that the driver is:
It is important to observe other drivers' behaviors and identify clues that indicate when person could be driving impaired. Drivers who have had too much to drink, are sleepy, are on drugs, or are ill can present hazards to other drivers. A person driving with their window open in cold weather may be impaired.
5. When parking a double or triple vehicle:
When parking a double or triple, you should select a parking spot where you can pull forward when leaving. Be aware of the arrangement of the parking lot to avoid the need for a long and difficult exit.
6. If feeling sleepy while driving, you should:
If you begin to feel sleepy while driving, the only safe response is to stop driving and get some sleep. Attempting to fight off exhaustion is dangerous and a major cause of fatal crashes. Stimulants are not a safe solution because they may help keep you awake but will not make you more alert. Once stimulants wear off, you will be even more tired than you were originally.
7. If you have an engine fire, you should:
To keep an engine fire from spreading, you should turn off the vehicle's engine as soon as possible. Do not open the hood if you don't have to.
Frequently Asked Questions
1. Determine if you meet the eligibility requirements: You must hold a current North Carolina commercial driver's license (CDL) and pass a knowledge test specific to the Doubles/Triples endorsement.
2. Study the North Carolina Commercial Driver License Manual: The manual covers the information you need to know to pass the knowledge test. You can obtain a copy of the manual online or at any North Carolina DMV office.
3. Schedule an appointment to take the knowledge test: You can schedule an appointment online or by calling your local North Carolina DMV office. Be sure to bring your current CDL and any applicable fees.
4. Take and pass the knowledge test: The knowledge test covers topics such as coupling and uncoupling, inspecting doubles and triples, and safe driving practices for operating vehicles with multiple trailers.
5. Pay any applicable fees: There may be fees associated with obtaining the Doubles/Triples endorsement. Check with your local DMV for specific fee information.
6. Update your CDL: Once you have passed the knowledge test and paid any applicable fees, your CDL will be updated to include the Doubles/Triples endorsement.
7. Practice safe driving: Remember to always practice safe driving techniques when operating a vehicle with multiple trailers, including keeping a safe distance from other vehicles and adjusting your driving habits based on road conditions.
Note: It is important to note that certain medical conditions may disqualify you from obtaining a CDL or specific endorsements. Be sure to check with your healthcare provider and local DMV for any medical requirements or restrictions before pursuing a CDL or endorsement.
1. Be at least 18 years of age: You must be at least 18 years old to operate a commercial vehicle within the state of North Carolina. However, you must be at least 21 years old to operate a commercial vehicle across state lines or transport hazardous materials.
2. Hold a valid North Carolina CDL: You must already have a valid North Carolina commercial driver's license before seeking the Doubles/Triples endorsement.
3. Pass a knowledge test: You must pass a knowledge test specific to the Doubles/Triples endorsement. The test covers topics such as coupling and uncoupling, inspecting doubles and triples, and safe driving practices for operating vehicles with multiple trailers.
4. Pay applicable fees: There may be fees associated with obtaining the Doubles/Triples endorsement. Check with your local DMV for specific fee information.
5. Meet medical requirements: You must meet certain medical requirements to obtain and maintain a CDL in North Carolina. These requirements include passing a medical exam and maintaining a valid medical certificate.
6. Have a clean driving record: You must have a clean driving record with no major traffic violations in the past three years.
It is important to note that these requirements may vary depending on your individual circumstances and the type of commercial vehicle you will be operating. Be sure to check with your local DMV for any additional requirements or restrictions before pursuing a CDL Doubles/Triples license.
Here are the requirements for training and experience:
1. Complete a CDL training program: You must complete a CDL training program that includes instruction on operating vehicles with multiple trailers. Training programs may be offered by private companies or community colleges.
2. Receive behind-the-wheel training: You must receive behind-the-wheel training on operating vehicles with multiple trailers. This training must be provided by a qualified instructor or employer.
3. Pass a skills test: You must pass a skills test that includes both a pre-trip inspection and an on-road driving test with multiple trailers.
4. Obtain a learner's permit: Before receiving behind-the-wheel training, you must obtain a learner's permit and be accompanied by a qualified instructor or employer.
It is important to note that these requirements may vary depending on your individual circumstances and the type of commercial vehicle you will be operating. Be sure to check with your local DMV for any additional requirements or restrictions before pursuing a CDL Doubles/Triples endorsement.
In addition to the Doubles/Triples endorsement test, you may also need to take other written tests or exams depending on the type of commercial vehicle you will be operating. For example, if you plan to transport hazardous materials, you will need to pass a hazardous materials endorsement test.
It is important to note that in order to obtain a CDL Doubles/Triples endorsement, you must already have a valid North Carolina commercial driver's license (CDL). This means that you must have already passed the general knowledge test and any other required tests for your initial CDL license.
Be sure to check with your local DMV for specific information on testing requirements for obtaining a CDL Doubles/Triples endorsement in North Carolina.
1. Coupling and uncoupling: You will be asked to demonstrate proper coupling and uncoupling procedures for multiple trailers, including checking the connections, air lines, and electrical lines.
2. Straight-line backing: You will be asked to back up your vehicle in a straight line for a specified distance.
3. Offset backing: You will be asked to back your vehicle into a space offset to the left or right of your starting position.
4. Parallel parking: You will be asked to park your vehicle in a space parallel to the curb.
5. Alley dock: You will be asked to back your vehicle into an alley dock, which simulates a loading dock or other confined space.
6. On-road driving: You will be asked to drive your vehicle on public roads while pulling multiple trailers, demonstrating safe driving practices such as turning, merging, and braking.
During the test, you will be evaluated on your ability to perform these maneuvers safely and effectively, as well as your overall control of the vehicle. Be sure to practice these maneuvers extensively before taking the test, and follow all safety guidelines and regulations for operating vehicles with multiple trailers.
It is important to note that the requirements for obtaining a CDL Doubles/Triples endorsement vary by state. In North Carolina, you must pass a written knowledge test specific to the Doubles/Triples endorsement and a skills test that includes both a pre-trip inspection and an on-road driving test with multiple trailers.
Operating a commercial vehicle without the proper endorsements or licenses can result in fines, suspension or revocation of your CDL, and other penalties. It is important to ensure that you have the proper endorsements and licenses before operating any commercial vehicle.
To add the endorsement to your license, you will need to visit a North Carolina DMV office and bring the following documents:
1. Your current CDL license
2. Proof of citizenship or lawful presence
3. Proof of North Carolina residency
4. Your Social Security card
5. Medical certificate
You will also need to pass a vision test and pay the required fees for the endorsement.
It is important to note that adding an endorsement to your CDL license may require additional training or experience, depending on your current qualifications and driving record. Be sure to consult with your employer and/or a reputable driving school or training program to ensure that you have the necessary skills and knowledge before taking the endorsement test.
The most important restriction is that you can only operate commercial vehicles that have multiple trailers attached. This means that if you are driving a single trailer commercial vehicle, you cannot use your CDL Doubles/Triples endorsement.
In addition, some states may have specific weight or length restrictions for commercial vehicles with multiple trailers, and it is important to be aware of these restrictions when operating in different states.
It is also important to note that operating a commercial vehicle with multiple trailers requires additional skills and experience, and it is important to receive proper training before attempting to operate these vehicles.
Finally, all CDL holders are subject to federal and state regulations regarding hours of service, drug and alcohol testing, and other safety requirements. It is important to be aware of these regulations and comply with them at all times when operating a commercial vehicle with multiple trailers.
However, there are federal length restrictions for commercial vehicles with multiple trailers, which are designed to ensure safety on the roads. According to federal regulations, the maximum length for double trailer combinations is 28 feet for each trailer and a total of 63 feet overall. For triple trailer combinations, each trailer can be up to 28 feet long and the total length cannot exceed 75 feet.
It is important to note that different states may have different weight and length restrictions for commercial vehicles with multiple trailers. Before operating a commercial vehicle with multiple trailers in a different state, it is important to research and comply with the specific regulations in that state.
Here are some of the most important ones:
1. Proper training: Before driving a commercial vehicle with multiple trailers, it is important to receive proper training and certification. This includes both classroom and behind-the-wheel instruction, as well as a demonstration of proficiency in handling multiple trailers.
2. Vehicle inspection: Drivers must inspect their vehicle before each trip to ensure that it is safe to operate. This includes checking the brakes, tires, lights, coupling devices, and other components of the vehicle.
3. Weight distribution: When loading cargo onto a commercial vehicle with multiple trailers, it is important to distribute the weight evenly across all trailers. Uneven weight distribution can cause instability and increase the risk of accidents.
4. Speed control: Commercial vehicles with multiple trailers have a higher risk of rollover due to their length and weight. It is important to drive at a safe speed and slow down when turning or taking curves.
5. Following distance: Drivers should maintain a greater following distance when driving a commercial vehicle with multiple trailers, as they require more space to stop.
6. Use of mirrors: Proper use of mirrors is essential when driving a commercial vehicle with multiple trailers. Drivers should use their mirrors to monitor their blind spots and ensure that all trailers are following safely.
7. Compliance with regulations: All CDL holders are subject to federal and state regulations regarding hours of service, drug and alcohol testing, and other safety requirements. It is important to be aware of these regulations and comply with them at all times when operating a commercial vehicle with multiple trailers.
By following these safety considerations and regulations, drivers can help ensure that they operate commercial vehicles with multiple trailers safely and responsibly.