Double
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 Commercial Driver Guide. 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.
Number of Question
Passing Score
1. If you are being tailgated, you should:
Explanation
If someone is tailgating you, it is a good idea to open up the space ahead of your vehicle to make it easier for the driver to pass you. Increasing your speed is not a good idea because the driver may continue to tailgate you at the higher speed, only increasing the danger.
2. How is the parking brake released?
Explanation
In newer vehicles with air brakes, the parking brakes are controlled by a diamond-shaped yellow knob. Pull the knob out to activate the parking brakes and push it in to release them.
3. A lightly-loaded combination vehicle will stop more slowly than a fully-loaded vehicle because:
Explanation
An empty combination vehicle will come to a complete stop more slowly than a fully-loaded vehicle. The stiff suspension springs and strong brakes will have lower traction on a light trailer than they would if the vehicle carried more weight.
4. In a vehicle equipped with an automatic tractor protection valve, the valve will pop out when air pressure drops to a level between:
Explanation
In vehicles equipped with an automatic tractor protection valve, the valve will pop out if air pressure drops to a level between 20 and 45 psi. When the valve pops out, the protection valve will close, stopping the flow of air.
5. If feeling sleepy while driving, you should:
Explanation
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.
6. On a leaf spring, the leaves:
Explanation
When inspecting a vehicle's suspension, you should look for broken or missing leaves in the leaf springs. Any defect of this kind is dangerous. If one-fourth or more of the leaves are missing from any leaf spring, the vehicle must be put out-of-service.
7. If a truck is equipped, a trailer brake hand valve can be used to:
Explanation
If a tractor-trailer is so equipped, the trailer brake hand valve can be used to stop the vehicle from rolling back when being started from a stop.
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Frequently Asked Questions
To obtain a CDL Doubles/Triples endorsement in Tennessee, you will need to follow these steps:
1. Meet the basic requirements: You must be at least 18 years old, possess a valid Tennessee driver's license, and hold a valid CDL.
2. Obtain the Tennessee Commercial Driver License Manual: You can get this manual from any Tennessee Driver Services Center or download it from the Tennessee Department of Safety and Homeland Security's website.
3. Study the Doubles/Triples section of the manual: Read this section carefully to understand the requirements for operating doubles/triples vehicles, including safety procedures, coupling and uncoupling procedures, and emergency procedures.
4. Pass the Doubles/Triples Knowledge Test: Visit any Tennessee Driver Services Center to take the Doubles/Triples Knowledge Test. You will need to answer at least 80% of the questions correctly to pass.
5. Pass the Doubles/Triples Skills Test: Once you pass the Knowledge Test, you will need to pass the Skills Test. The Skills Test includes a pre-trip inspection, basic control skills, and on-road driving test while operating a doubles/triples vehicle.
6. Pay the necessary fees: There will be fees associated with obtaining a CDL Doubles/Triples endorsement in Tennessee. The current fee is $14 for each endorsement.
7. Receive your endorsement: Once you pass both tests and pay the necessary fees, you will receive your CDL Doubles/Triples endorsement on your Tennessee driver's license.
It is important to note that obtaining a CDL Doubles/Triples endorsement requires additional training and experience beyond that of a standard CDL. It is recommended that you receive training from a reputable truck driving school or training program before attempting to obtain this endorsement.
1. Meet the basic requirements: You must be at least 18 years old, possess a valid Tennessee driver's license, and hold a valid CDL.
2. Obtain the Tennessee Commercial Driver License Manual: You can get this manual from any Tennessee Driver Services Center or download it from the Tennessee Department of Safety and Homeland Security's website.
3. Study the Doubles/Triples section of the manual: Read this section carefully to understand the requirements for operating doubles/triples vehicles, including safety procedures, coupling and uncoupling procedures, and emergency procedures.
4. Pass the Doubles/Triples Knowledge Test: Visit any Tennessee Driver Services Center to take the Doubles/Triples Knowledge Test. You will need to answer at least 80% of the questions correctly to pass.
5. Pass the Doubles/Triples Skills Test: Once you pass the Knowledge Test, you will need to pass the Skills Test. The Skills Test includes a pre-trip inspection, basic control skills, and on-road driving test while operating a doubles/triples vehicle.
6. Pay the necessary fees: There will be fees associated with obtaining a CDL Doubles/Triples endorsement in Tennessee. The current fee is $14 for each endorsement.
7. Receive your endorsement: Once you pass both tests and pay the necessary fees, you will receive your CDL Doubles/Triples endorsement on your Tennessee driver's license.
It is important to note that obtaining a CDL Doubles/Triples endorsement requires additional training and experience beyond that of a standard CDL. It is recommended that you receive training from a reputable truck driving school or training program before attempting to obtain this endorsement.
To get a CDL Doubles/Triples license, also known as an endorsement, in Tennessee, you must meet the following requirements:
1. Be at least 18 years old: You must be at least 18 years old to drive a commercial vehicle within the state of Tennessee. However, you must be at least 21 years old to drive a commercial vehicle across state lines or transport hazardous materials.
2. Hold a valid Tennessee driver's license: You must hold a valid Tennessee driver's license before you can apply for a CDL Doubles/Triples endorsement.
3. Have a valid CDL: You must already hold a valid commercial driver's license (CDL) or be applying for a CDL at the same time as the Doubles/Triples endorsement.
4. Pass the Doubles/Triples Knowledge Test: You must pass the Doubles/Triples Knowledge Test, which covers topics such as coupling and uncoupling procedures, safety procedures, and emergency procedures for operating doubles/triples vehicles.
5. Pass the Doubles/Triples Skills Test: You must pass the Doubles/Triples Skills Test, which includes a pre-trip inspection, basic control skills, and on-road driving test while operating a doubles/triples vehicle.
6. Pay the necessary fees: There are fees associated with obtaining a CDL Doubles/Triples endorsement in Tennessee. The current fee is $14 for each endorsement.
It is important to note that obtaining a CDL Doubles/Triples endorsement requires additional training and experience beyond that of a standard CDL. It is recommended that you receive training from a reputable truck driving school or training program before attempting to obtain this endorsement.
1. Be at least 18 years old: You must be at least 18 years old to drive a commercial vehicle within the state of Tennessee. However, you must be at least 21 years old to drive a commercial vehicle across state lines or transport hazardous materials.
2. Hold a valid Tennessee driver's license: You must hold a valid Tennessee driver's license before you can apply for a CDL Doubles/Triples endorsement.
3. Have a valid CDL: You must already hold a valid commercial driver's license (CDL) or be applying for a CDL at the same time as the Doubles/Triples endorsement.
4. Pass the Doubles/Triples Knowledge Test: You must pass the Doubles/Triples Knowledge Test, which covers topics such as coupling and uncoupling procedures, safety procedures, and emergency procedures for operating doubles/triples vehicles.
5. Pass the Doubles/Triples Skills Test: You must pass the Doubles/Triples Skills Test, which includes a pre-trip inspection, basic control skills, and on-road driving test while operating a doubles/triples vehicle.
6. Pay the necessary fees: There are fees associated with obtaining a CDL Doubles/Triples endorsement in Tennessee. The current fee is $14 for each endorsement.
It is important to note that obtaining a CDL Doubles/Triples endorsement requires additional training and experience beyond that of a standard CDL. It is recommended that you receive training from a reputable truck driving school or training program before attempting to obtain this endorsement.
Yes, you will need specific training and experience to obtain a CDL Doubles/Triples endorsement in Tennessee. According to federal regulations, you must have a valid CDL and have held it for at least two years before applying for a Doubles/Triples endorsement. You must also complete specialized training that covers the knowledge and skills necessary to operate a doubles/triples vehicle safely. This training can be obtained through a truck driving school or training program.
In addition to the specialized training, you will need hands-on experience operating doubles/triples vehicles. This experience can be gained through on-the-job training with an employer that operates these types of vehicles.
It is important to note that operating doubles/triples vehicles requires additional knowledge and skill beyond that of a standard commercial vehicle. These vehicles have longer stopping distances, require more space to turn, and have additional safety concerns that must be taken into account while driving. Therefore, it is highly recommended that you receive specialized training before attempting to obtain a CDL Doubles/Triples endorsement.
In addition to the specialized training, you will need hands-on experience operating doubles/triples vehicles. This experience can be gained through on-the-job training with an employer that operates these types of vehicles.
It is important to note that operating doubles/triples vehicles requires additional knowledge and skill beyond that of a standard commercial vehicle. These vehicles have longer stopping distances, require more space to turn, and have additional safety concerns that must be taken into account while driving. Therefore, it is highly recommended that you receive specialized training before attempting to obtain a CDL Doubles/Triples endorsement.
Yes, there is an additional written test, called the Doubles/Triples Knowledge Test, that you must pass to obtain a CDL Doubles/Triples endorsement in Tennessee. This test covers topics such as coupling and uncoupling procedures, safety procedures, and emergency procedures for operating doubles/triples vehicles. You must pass this test in addition to the general knowledge test and any other endorsement tests you may be required to take.
The Doubles/Triples Knowledge Test consists of 20 multiple-choice questions, and you must answer at least 16 questions correctly to pass. You will be given 30 minutes to complete the test.
It is important to study the Tennessee Commercial Driver License Manual thoroughly before taking the Doubles/Triples Knowledge Test. This manual covers all of the information you need to know to pass the test and operate a doubles/triples vehicle safely. You can obtain a copy of the manual from any Tennessee Department of Safety driver services center or download it from their website.
The Doubles/Triples Knowledge Test consists of 20 multiple-choice questions, and you must answer at least 16 questions correctly to pass. You will be given 30 minutes to complete the test.
It is important to study the Tennessee Commercial Driver License Manual thoroughly before taking the Doubles/Triples Knowledge Test. This manual covers all of the information you need to know to pass the test and operate a doubles/triples vehicle safely. You can obtain a copy of the manual from any Tennessee Department of Safety driver services center or download it from their website.
To obtain a CDL Doubles/Triples endorsement in Tennessee, you will need to pass a skills test that includes specific maneuvers that demonstrate your ability to safely operate a doubles/triples vehicle. These maneuvers include:
1. Pre-trip inspection: You will need to perform a thorough pre-trip inspection of your vehicle, including checking the coupling, air lines, electrical connections, and brakes.
2. Coupling and uncoupling: You will need to correctly couple and uncouple the trailer from the tractor unit, including performing safety checks and ensuring that all connections are secure.
3. Straight-line backing: You will need to back your vehicle in a straight line for a distance of at least 100 feet, while staying within a defined boundary.
4. Offset backing: You will need to back your vehicle into a space that is offset to the left or right of the truck, while staying within a defined boundary.
5. Alley docking: You will need to back your vehicle into an alley that is narrower than the width of your vehicle, while staying within a defined boundary.
6. Road test: You will need to demonstrate your ability to safely operate your vehicle on the road, including shifting gears, accelerating, braking, turning, and merging with traffic.
It is important to practice these maneuvers extensively before taking the skills test. You may want to consider enrolling in a truck driving school or training program that specializes in doubles/triples vehicles to gain additional experience and instruction.
1. Pre-trip inspection: You will need to perform a thorough pre-trip inspection of your vehicle, including checking the coupling, air lines, electrical connections, and brakes.
2. Coupling and uncoupling: You will need to correctly couple and uncouple the trailer from the tractor unit, including performing safety checks and ensuring that all connections are secure.
3. Straight-line backing: You will need to back your vehicle in a straight line for a distance of at least 100 feet, while staying within a defined boundary.
4. Offset backing: You will need to back your vehicle into a space that is offset to the left or right of the truck, while staying within a defined boundary.
5. Alley docking: You will need to back your vehicle into an alley that is narrower than the width of your vehicle, while staying within a defined boundary.
6. Road test: You will need to demonstrate your ability to safely operate your vehicle on the road, including shifting gears, accelerating, braking, turning, and merging with traffic.
It is important to practice these maneuvers extensively before taking the skills test. You may want to consider enrolling in a truck driving school or training program that specializes in doubles/triples vehicles to gain additional experience and instruction.
No, you cannot legally operate double/triple trailers without a CDL Doubles/Triples endorsement in Tennessee. You must have a valid CDL with the Doubles/Triples endorsement to operate a commercial vehicle with two or three trailers attached.
The only exception to this rule is if you are driving a recreational vehicle (RV) that is being used for non-commercial purposes. In this case, you may be able to operate a double/triple trailer without a CDL Doubles/Triples endorsement, as long as the combined weight of the vehicle and trailer(s) does not exceed 26,000 pounds.
However, if you are driving a commercial vehicle with two or three trailers attached, you must have a valid CDL with the Doubles/Triples endorsement. Operating a commercial vehicle without the proper endorsements can result in fines, license suspension or revocation, and other penalties.
The only exception to this rule is if you are driving a recreational vehicle (RV) that is being used for non-commercial purposes. In this case, you may be able to operate a double/triple trailer without a CDL Doubles/Triples endorsement, as long as the combined weight of the vehicle and trailer(s) does not exceed 26,000 pounds.
However, if you are driving a commercial vehicle with two or three trailers attached, you must have a valid CDL with the Doubles/Triples endorsement. Operating a commercial vehicle without the proper endorsements can result in fines, license suspension or revocation, and other penalties.
You can add the CDL Doubles/Triples endorsement to your existing CDL license in Tennessee without applying for a new license. To obtain the endorsement, you will need to pass a written knowledge test and a skills test that includes specific maneuvers demonstrating your ability to safely operate a doubles/triples vehicle.
To add the endorsement to your CDL license, you will need to visit a Tennessee Department of Safety and Homeland Security Driver Services Center and complete the following steps:
1. Provide your valid CDL license and proof of identity.
2. Pass the written knowledge test for the Doubles/Triples endorsement.
3. Pass the skills test that includes specific maneuvers demonstrating your ability to safely operate a doubles/triples vehicle.
4. Pay the endorsement fee.
Once you have successfully completed these steps, the Doubles/Triples endorsement will be added to your existing CDL license. It is important to note that you must have a valid medical certificate on file with the Tennessee Department of Safety and Homeland Security in order to add or renew an endorsement on your CDL license.
To add the endorsement to your CDL license, you will need to visit a Tennessee Department of Safety and Homeland Security Driver Services Center and complete the following steps:
1. Provide your valid CDL license and proof of identity.
2. Pass the written knowledge test for the Doubles/Triples endorsement.
3. Pass the skills test that includes specific maneuvers demonstrating your ability to safely operate a doubles/triples vehicle.
4. Pay the endorsement fee.
Once you have successfully completed these steps, the Doubles/Triples endorsement will be added to your existing CDL license. It is important to note that you must have a valid medical certificate on file with the Tennessee Department of Safety and Homeland Security in order to add or renew an endorsement on your CDL license.
Yes, there are some restrictions and limitations for drivers with a CDL Doubles/Triples endorsement in Tennessee. These restrictions are put in place to ensure the safety of the driver, cargo, and other motorists on the road.
Some of the restrictions and limitations for drivers with a CDL Doubles/Triples endorsement include:
1. Vehicle weight limits: The combined weight of the vehicle and trailers cannot exceed 80,000 pounds.
2. Length limits: The maximum length allowed for a double trailer combination is 28 feet per trailer, and for a triple trailer combination is 28 feet per trailer.
3. Speed limits: Drivers of double or triple trailers must obey posted speed limits and may not exceed 65 mph on any road or highway.
4. Road restrictions: Some roads and highways may be prohibited for use by vehicles with double or triple trailers due to their size and weight.
5. Special training requirements: Drivers with a CDL Doubles/Triples endorsement must complete specialized training to ensure they have the skills necessary to safely operate a doubles/triples vehicle.
It is important to note that violating any of these restrictions can result in fines, license suspension or revocation, and other penalties.
Some of the restrictions and limitations for drivers with a CDL Doubles/Triples endorsement include:
1. Vehicle weight limits: The combined weight of the vehicle and trailers cannot exceed 80,000 pounds.
2. Length limits: The maximum length allowed for a double trailer combination is 28 feet per trailer, and for a triple trailer combination is 28 feet per trailer.
3. Speed limits: Drivers of double or triple trailers must obey posted speed limits and may not exceed 65 mph on any road or highway.
4. Road restrictions: Some roads and highways may be prohibited for use by vehicles with double or triple trailers due to their size and weight.
5. Special training requirements: Drivers with a CDL Doubles/Triples endorsement must complete specialized training to ensure they have the skills necessary to safely operate a doubles/triples vehicle.
It is important to note that violating any of these restrictions can result in fines, license suspension or revocation, and other penalties.
In Tennessee, drivers with a CDL Doubles/Triples endorsement are subject to maximum weight and length limits for double/triple trailers. These limits are in place to ensure the safety of the driver, cargo, and other motorists on the road.
Weight limits:
- The maximum weight allowed for a double trailer combination is 80,000 pounds.
- The maximum weight allowed for a triple trailer combination is 80,000 pounds.
Length limits:
- The maximum length allowed for a double trailer combination is 28 feet per trailer.
- The maximum length allowed for a triple trailer combination is 28 feet per trailer.
It is important to note that violating these weight and length limits can result in fines, license suspension or revocation, and other penalties. Drivers with a CDL Doubles/Triples endorsement should always ensure they are operating their vehicles within these limits to ensure safety on the road.
Weight limits:
- The maximum weight allowed for a double trailer combination is 80,000 pounds.
- The maximum weight allowed for a triple trailer combination is 80,000 pounds.
Length limits:
- The maximum length allowed for a double trailer combination is 28 feet per trailer.
- The maximum length allowed for a triple trailer combination is 28 feet per trailer.
It is important to note that violating these weight and length limits can result in fines, license suspension or revocation, and other penalties. Drivers with a CDL Doubles/Triples endorsement should always ensure they are operating their vehicles within these limits to ensure safety on the road.
Yes, there are specific safety considerations and regulations for driving double/triple trailers with a CDL Doubles/Triples endorsement in Tennessee. These regulations are in place to ensure the safety of the driver, cargo, and other motorists on the road.
Here are some of the safety considerations and regulations:
1. Specialized training: Drivers with a CDL Doubles/Triples endorsement are required to complete specialized training to ensure they have the skills necessary to safely operate a doubles/triples vehicle.
2. Weight distribution: Proper weight distribution is critical when operating a double/triple trailer. Overloading or unevenly distributing weight can cause instability and increase the risk of accidents.
3. Braking systems: Double/triple trailers require specialized braking systems to ensure they can be safely stopped in an emergency.
4. Limited visibility: Double/triple trailers have limited visibility, which can make it difficult for drivers to see other vehicles on the road. Drivers must be aware of their blind spots and take extra care when changing lanes or turning.
5. Speed limits: Drivers of double/triple trailers must obey posted speed limits and may not exceed 65 mph on any road or highway.
6. Road restrictions: Some roads and highways may be prohibited for use by vehicles with double or triple trailers due to their size and weight.
It is important for drivers with a CDL Doubles/Triples endorsement to be aware of these safety considerations and regulations to ensure they are operating their vehicles safely and responsibly on the road.
Here are some of the safety considerations and regulations:
1. Specialized training: Drivers with a CDL Doubles/Triples endorsement are required to complete specialized training to ensure they have the skills necessary to safely operate a doubles/triples vehicle.
2. Weight distribution: Proper weight distribution is critical when operating a double/triple trailer. Overloading or unevenly distributing weight can cause instability and increase the risk of accidents.
3. Braking systems: Double/triple trailers require specialized braking systems to ensure they can be safely stopped in an emergency.
4. Limited visibility: Double/triple trailers have limited visibility, which can make it difficult for drivers to see other vehicles on the road. Drivers must be aware of their blind spots and take extra care when changing lanes or turning.
5. Speed limits: Drivers of double/triple trailers must obey posted speed limits and may not exceed 65 mph on any road or highway.
6. Road restrictions: Some roads and highways may be prohibited for use by vehicles with double or triple trailers due to their size and weight.
It is important for drivers with a CDL Doubles/Triples endorsement to be aware of these safety considerations and regulations to ensure they are operating their vehicles safely and responsibly on the road.
