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 possible answer choices. Test questions come from the Oklahoma 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.
Number of Question
Passing Score
8. Having ABS on only one axle:
Explanation
If you have an Anti-Lock Braking System (ABS) equipped on only the tractor, only the trailer, or only one axle, you will still have more control over the vehicle when braking than you would without ABS. You should brake normally.
9. Mirror adjustment can only be checked properly if:
Explanation
On a vehicle with one or more trailers, mirror adjustment can only be checked accurately if the trailers are straight. Mirror adjustment should be checked before the start of every trip.
10. When entering traffic, a large vehicle usually needs:
Explanation
A large vehicle requires more space when entering or crossing traffic than a smaller vehicle. This is not only because the vehicle itself is larger, but also because it needs a longer distance to accelerate.
11. What is removed when an air tank is drained?
Explanation
In an air brake system, air tanks have drains to remove accumulations of water and compressor oil. Allowing water and oil to accumulate in the system could cause damage to the brakes.
12. To stay alert while driving, you should:
Explanation
Splitting driving responsibilities with a second driver lowers the chance that either of you will drive while fatigued. You can also reduce the risk of fatigue by avoiding heavy foods and keeping the interior of the cab cool.
13. How much distance will an air brake-equipped vehicle need to come to a complete stop if it is traveling at 55 mph under ideal driving conditions?
Explanation
A vehicle's total stopping distance is made up of perception distance, reaction distance, brake lag distance, and braking distance. With all of these factors included, an air brake-equipped vehicle traveling at a speed of 55 mph under ideal driving conditions will need approximately 450 feet to come to a complete stop.
14. An example of required emergency equipment is:
Explanation
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.
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Frequently Asked Questions
To obtain a CDL Doubles/Triples endorsement in Oklahoma, follow these steps:
1. Meet the eligibility requirements: You must possess a valid Oklahoma Class A CDL license and be at least 21 years of age.
2. Obtain the Oklahoma CDL Doubles/Triples endorsement study guide from the Department of Public Safety or download it online.
3. Study the guide thoroughly to gain a clear understanding of the rules and regulations associated with operating doubles and triples vehicles.
4. Schedule an appointment with a CDL examiner at a Department of Public Safety office to take the doubles/triples written knowledge test.
5. Pass the written knowledge test with a score of at least 80%.
6. Schedule an appointment for a driving test at a Department of Public Safety office or an approved third-party testing facility.
7. Pass the driving test which will include demonstrations of your ability to perform pre-trip inspections, coupling and uncoupling procedures, and driving skills specific to doubles and triples.
8. Pay the required fee to add the doubles/triples endorsement to your CDL license.
9. After successfully passing all tests and obtaining the endorsement, you will receive a new CDL license with your doubles/triples endorsement added to it.
It is important to note that there are additional requirements for drivers who wish to operate vehicles with air brakes or hazardous materials, and these requirements must be met before obtaining those endorsements on your CDL license.
1. Meet the eligibility requirements: You must possess a valid Oklahoma Class A CDL license and be at least 21 years of age.
2. Obtain the Oklahoma CDL Doubles/Triples endorsement study guide from the Department of Public Safety or download it online.
3. Study the guide thoroughly to gain a clear understanding of the rules and regulations associated with operating doubles and triples vehicles.
4. Schedule an appointment with a CDL examiner at a Department of Public Safety office to take the doubles/triples written knowledge test.
5. Pass the written knowledge test with a score of at least 80%.
6. Schedule an appointment for a driving test at a Department of Public Safety office or an approved third-party testing facility.
7. Pass the driving test which will include demonstrations of your ability to perform pre-trip inspections, coupling and uncoupling procedures, and driving skills specific to doubles and triples.
8. Pay the required fee to add the doubles/triples endorsement to your CDL license.
9. After successfully passing all tests and obtaining the endorsement, you will receive a new CDL license with your doubles/triples endorsement added to it.
It is important to note that there are additional requirements for drivers who wish to operate vehicles with air brakes or hazardous materials, and these requirements must be met before obtaining those endorsements on your CDL license.
To get a CDL Doubles/Triples license, you must meet the following requirements:
1. Be at least 21 years old: You must be at least 21 years of age to operate a commercial vehicle that is designed to haul double or triple trailers.
2. Possess a valid Oklahoma Class A CDL license: You must already have a valid Oklahoma Class A CDL license before you can apply for the Doubles/Triples endorsement.
3. Pass the Doubles/Triples knowledge test: You must pass the written knowledge test on doubles/triples vehicles, which covers topics such as coupling and uncoupling procedures, weight distribution, and safe driving practices.
4. Pass the Doubles/Triples skills test: You must pass a driving skills test in which you will demonstrate your ability to safely operate double or triple trailers, including coupling and uncoupling procedures, backing up, and maneuvering in tight spaces.
5. Pay the required fee: There is a fee that you must pay to add the Doubles/Triples endorsement to your CDL license.
It's important to note that there may be additional requirements for obtaining other CDL endorsements, such as hazmat or tanker endorsements. Be sure to check with your local Department of Public Safety for more information on any additional requirements for obtaining a CDL Doubles/Triples license.
1. Be at least 21 years old: You must be at least 21 years of age to operate a commercial vehicle that is designed to haul double or triple trailers.
2. Possess a valid Oklahoma Class A CDL license: You must already have a valid Oklahoma Class A CDL license before you can apply for the Doubles/Triples endorsement.
3. Pass the Doubles/Triples knowledge test: You must pass the written knowledge test on doubles/triples vehicles, which covers topics such as coupling and uncoupling procedures, weight distribution, and safe driving practices.
4. Pass the Doubles/Triples skills test: You must pass a driving skills test in which you will demonstrate your ability to safely operate double or triple trailers, including coupling and uncoupling procedures, backing up, and maneuvering in tight spaces.
5. Pay the required fee: There is a fee that you must pay to add the Doubles/Triples endorsement to your CDL license.
It's important to note that there may be additional requirements for obtaining other CDL endorsements, such as hazmat or tanker endorsements. Be sure to check with your local Department of Public Safety for more information on any additional requirements for obtaining a CDL Doubles/Triples license.
While there are no specific experience or training requirements to obtain a CDL Doubles/Triples endorsement in Oklahoma, it is important to note that operating double or triple trailers requires additional skills and knowledge beyond those needed for a standard CDL license. Therefore, it is recommended that you receive specialized training to prepare for the Doubles/Triples endorsement.
Many truck driving schools offer specialized training programs for doubles and triples, which can provide you with the knowledge and skills needed to pass the written and driving tests. Additionally, some trucking companies may require drivers to have a certain amount of experience before operating double or triple trailers.
It is important to remember that operating double or triple trailers requires a higher level of skill and attention than operating a single vehicle. As such, you must be confident in your ability to safely operate these vehicles before taking the tests for the Doubles/Triples endorsement.
Many truck driving schools offer specialized training programs for doubles and triples, which can provide you with the knowledge and skills needed to pass the written and driving tests. Additionally, some trucking companies may require drivers to have a certain amount of experience before operating double or triple trailers.
It is important to remember that operating double or triple trailers requires a higher level of skill and attention than operating a single vehicle. As such, you must be confident in your ability to safely operate these vehicles before taking the tests for the Doubles/Triples endorsement.
Yes, to obtain a CDL Doubles/Triples endorsement in Oklahoma, you will need to pass an additional written exam that covers the knowledge and skills required to safely operate double or triple trailers.
The written exam will cover topics such as weight distribution, coupling and uncoupling procedures, and safe driving practices specific to double or triple trailers. You will need to answer questions related to these topics correctly in order to pass the test.
In addition to the written exam, you will also need to pass a driving skills test that is specific to double or triple trailers. The driving skills test will evaluate your ability to safely operate a vehicle with two or three trailers attached, including backing up and maneuvering in tight spaces.
It's important to note that the CDL Doubles/Triples endorsement is considered an advanced endorsement, and as such, it requires additional knowledge and skills beyond those required for a standard CDL license. To ensure that you are fully prepared for the written and driving skills tests, it's recommended that you receive specialized training before attempting to obtain this endorsement.
The written exam will cover topics such as weight distribution, coupling and uncoupling procedures, and safe driving practices specific to double or triple trailers. You will need to answer questions related to these topics correctly in order to pass the test.
In addition to the written exam, you will also need to pass a driving skills test that is specific to double or triple trailers. The driving skills test will evaluate your ability to safely operate a vehicle with two or three trailers attached, including backing up and maneuvering in tight spaces.
It's important to note that the CDL Doubles/Triples endorsement is considered an advanced endorsement, and as such, it requires additional knowledge and skills beyond those required for a standard CDL license. To ensure that you are fully prepared for the written and driving skills tests, it's recommended that you receive specialized training before attempting to obtain this endorsement.
To obtain a CDL Doubles/Triples endorsement in Oklahoma, you will be required to pass a driving skills test that is specific to double or triple trailers. During the test, you will need to demonstrate your ability to safely operate a vehicle with two or three trailers attached.
The driving skills test will evaluate your ability to perform specific maneuvers, including:
1. Coupling and uncoupling procedures: You will need to demonstrate proper procedures for coupling and uncoupling the trailers.
2. Driving on a straight course: You will need to maintain control of the vehicle while driving on a straight course.
3. Turning: You will need to make turns safely with the trailers attached.
4. Backing up: You will need to back up the vehicle with the trailers attached, including making turns and maneuvering in tight spaces.
5. Lane changes: You will need to change lanes safely with the trailers attached.
6. Braking and stopping: You will need to bring the vehicle to a safe and controlled stop.
During the driving skills test, you will be evaluated on your ability to perform these maneuvers safely and efficiently. It's important to note that operating double or triple trailers requires a higher level of skill and attention than operating a single vehicle, so it's recommended that you receive specialized training before attempting to obtain this endorsement.
The driving skills test will evaluate your ability to perform specific maneuvers, including:
1. Coupling and uncoupling procedures: You will need to demonstrate proper procedures for coupling and uncoupling the trailers.
2. Driving on a straight course: You will need to maintain control of the vehicle while driving on a straight course.
3. Turning: You will need to make turns safely with the trailers attached.
4. Backing up: You will need to back up the vehicle with the trailers attached, including making turns and maneuvering in tight spaces.
5. Lane changes: You will need to change lanes safely with the trailers attached.
6. Braking and stopping: You will need to bring the vehicle to a safe and controlled stop.
During the driving skills test, you will be evaluated on your ability to perform these maneuvers safely and efficiently. It's important to note that operating double or triple trailers requires a higher level of skill and attention than operating a single vehicle, so it's recommended that you receive specialized training before attempting to obtain this endorsement.
No, you cannot legally operate a vehicle with double or triple trailers on public roads without a CDL Doubles/Triples endorsement in Oklahoma. This endorsement is required by law for drivers who operate vehicles with two or three trailers attached, and failure to obtain the endorsement can result in fines, penalties, and even the suspension or revocation of your CDL.
It's important to note that operating double or triple trailers requires a higher level of skill and attention than operating a single vehicle. Driving with multiple trailers requires specific knowledge and skills related to weight distribution, coupling and uncoupling procedures, and safe driving practices. Therefore, it's recommended that you receive specialized training before attempting to obtain this endorsement.
If you are caught operating a vehicle with double or triple trailers without the proper endorsement, you may face serious consequences. In addition to fines and penalties, you could also be putting yourself and other drivers at risk by operating a vehicle beyond your skill level. Therefore, it's important to obtain the proper endorsements before attempting to operate specialty vehicles on public roads.
It's important to note that operating double or triple trailers requires a higher level of skill and attention than operating a single vehicle. Driving with multiple trailers requires specific knowledge and skills related to weight distribution, coupling and uncoupling procedures, and safe driving practices. Therefore, it's recommended that you receive specialized training before attempting to obtain this endorsement.
If you are caught operating a vehicle with double or triple trailers without the proper endorsement, you may face serious consequences. In addition to fines and penalties, you could also be putting yourself and other drivers at risk by operating a vehicle beyond your skill level. Therefore, it's important to obtain the proper endorsements before attempting to operate specialty vehicles on public roads.
You can add the CDL Doubles/Triples endorsement to your existing CDL license in Oklahoma. To add this endorsement, you must pass the required knowledge and skills tests, and pay the required fee.
To add the Doubles/Triples endorsement to your CDL license, you will need to follow these steps:
1. Study for the Doubles/Triples endorsement test by reviewing the Oklahoma Commercial Driver License Manual. This manual provides information about safe driving practices, weight distribution, coupling and uncoupling procedures, and other topics related to operating vehicles with multiple trailers.
2. Schedule an appointment to take the Doubles/Triples endorsement test at your local Department of Public Safety (DPS) office. You will need to pass both a written knowledge test and a driving skills test specific to double or triple trailers.
3. Pay the required fee for adding the endorsement to your CDL license. The fee is currently $5 in Oklahoma.
Once you have passed the required tests and paid the fee, your CDL license will be updated to include the Doubles/Triples endorsement. You will then be legally authorized to operate vehicles with two or three trailers attached on public roads in Oklahoma.
To add the Doubles/Triples endorsement to your CDL license, you will need to follow these steps:
1. Study for the Doubles/Triples endorsement test by reviewing the Oklahoma Commercial Driver License Manual. This manual provides information about safe driving practices, weight distribution, coupling and uncoupling procedures, and other topics related to operating vehicles with multiple trailers.
2. Schedule an appointment to take the Doubles/Triples endorsement test at your local Department of Public Safety (DPS) office. You will need to pass both a written knowledge test and a driving skills test specific to double or triple trailers.
3. Pay the required fee for adding the endorsement to your CDL license. The fee is currently $5 in Oklahoma.
Once you have passed the required tests and paid the fee, your CDL license will be updated to include the Doubles/Triples endorsement. You will then be legally authorized to operate vehicles with two or three trailers attached on public roads in Oklahoma.
Yes, there are restrictions and limitations for drivers with a CDL Doubles/Triples endorsement in Oklahoma. These restrictions are in place to ensure the safety of the driver, other motorists, and pedestrians.
The following are some of the restrictions and limitations for drivers with a CDL Doubles/Triples endorsement:
1. Weight limits: Drivers with a Doubles/Triples endorsement must follow specific weight limits when operating vehicles with multiple trailers. These weight limits will vary depending on the type of vehicle being driven, as well as other factors such as road conditions and weather.
2. Distance limits: Oklahoma has specific distance limits for vehicles with multiple trailers. Drivers with a Doubles/Triples endorsement must follow these limits to ensure that they are not overextending themselves or putting other drivers at risk.
3. Special driving skills: Drivers with a Doubles/Triples endorsement must have special driving skills and knowledge related to weight distribution, coupling and uncoupling procedures, and safe driving practices. They must also be able to maneuver their vehicle safely in tight spaces, such as parking lots or loading docks.
4. Vehicle inspections: Drivers with a Doubles/Triples endorsement must perform regular vehicle inspections to ensure that their vehicle is safe to operate on public roads.
It's important to note that violating any of these restrictions or limitations can result in fines, penalties, and even the suspension or revocation of your CDL license. Therefore, it's important to follow all rules and regulations related to operating vehicles with multiple trailers in Oklahoma.
The following are some of the restrictions and limitations for drivers with a CDL Doubles/Triples endorsement:
1. Weight limits: Drivers with a Doubles/Triples endorsement must follow specific weight limits when operating vehicles with multiple trailers. These weight limits will vary depending on the type of vehicle being driven, as well as other factors such as road conditions and weather.
2. Distance limits: Oklahoma has specific distance limits for vehicles with multiple trailers. Drivers with a Doubles/Triples endorsement must follow these limits to ensure that they are not overextending themselves or putting other drivers at risk.
3. Special driving skills: Drivers with a Doubles/Triples endorsement must have special driving skills and knowledge related to weight distribution, coupling and uncoupling procedures, and safe driving practices. They must also be able to maneuver their vehicle safely in tight spaces, such as parking lots or loading docks.
4. Vehicle inspections: Drivers with a Doubles/Triples endorsement must perform regular vehicle inspections to ensure that their vehicle is safe to operate on public roads.
It's important to note that violating any of these restrictions or limitations can result in fines, penalties, and even the suspension or revocation of your CDL license. Therefore, it's important to follow all rules and regulations related to operating vehicles with multiple trailers in Oklahoma.
In Oklahoma, the maximum weight allowed for double/triple trailers with a CDL Doubles/Triples endorsement is 129,000 lbs. The weight must be distributed evenly between the axles of the trailers to ensure safe operation.
The maximum length for double/triple trailers is 28 feet for the first trailer and 28 feet for the second trailer, for a total length of 56 feet. However, if the second trailer is a full trailer and the first trailer is a converter dolly, the maximum length for double/triple trailers is 48 feet.
It's important to note that these weight and length limits are subject to change based on road conditions, weather, and other factors. It's important to check with the Oklahoma Department of Transportation (ODOT) or your employer to ensure that you are complying with all weight and length restrictions when operating double/triple trailers with a CDL Doubles/Triples endorsement.
The maximum length for double/triple trailers is 28 feet for the first trailer and 28 feet for the second trailer, for a total length of 56 feet. However, if the second trailer is a full trailer and the first trailer is a converter dolly, the maximum length for double/triple trailers is 48 feet.
It's important to note that these weight and length limits are subject to change based on road conditions, weather, and other factors. It's important to check with the Oklahoma Department of Transportation (ODOT) or your employer to ensure that you are complying with all weight and length restrictions when operating double/triple trailers with a CDL Doubles/Triples endorsement.
Yes, there are specific safety considerations and regulations for driving double/triple trailers with a CDL Doubles/Triples endorsement in Oklahoma. These regulations are in place to ensure the safety of the driver, passengers, and other motorists on the road.
Here are some of the safety considerations and regulations for driving double/triple trailers with a CDL Doubles/Triples endorsement:
1. Weight distribution: When driving double/triple trailers, it's important to ensure that weight is distributed evenly between the axles of the trailers. Uneven weight distribution can cause instability and increase the risk of accidents.
2. Turning: Drivers must take extra care when turning with double/triple trailers, as these vehicles have a larger turning radius than single-trailer vehicles. Drivers must also be aware of their trailer swing, which can cause collisions with other vehicles or objects.
3. Braking: Double/triple trailers require more time and distance to come to a complete stop compared to single-trailer vehicles. Drivers must maintain a safe following distance and be aware of their surroundings to avoid collisions.
4. Coupling and uncoupling: Drivers must have a thorough understanding of how to properly couple and uncouple their trailers to prevent accidents or damage to equipment.
5. Special endorsements: To operate double/triple trailers, drivers must have a CDL Doubles/Triples endorsement on their license. This endorsement requires additional training and testing to ensure that drivers have the necessary skills and knowledge to operate these vehicles safely.
It's important for drivers with a CDL Doubles/Triples endorsement to follow all regulations related to operating these vehicles in Oklahoma. Violating any of these regulations can result in fines, penalties, or even the suspension or revocation of your CDL license.
Here are some of the safety considerations and regulations for driving double/triple trailers with a CDL Doubles/Triples endorsement:
1. Weight distribution: When driving double/triple trailers, it's important to ensure that weight is distributed evenly between the axles of the trailers. Uneven weight distribution can cause instability and increase the risk of accidents.
2. Turning: Drivers must take extra care when turning with double/triple trailers, as these vehicles have a larger turning radius than single-trailer vehicles. Drivers must also be aware of their trailer swing, which can cause collisions with other vehicles or objects.
3. Braking: Double/triple trailers require more time and distance to come to a complete stop compared to single-trailer vehicles. Drivers must maintain a safe following distance and be aware of their surroundings to avoid collisions.
4. Coupling and uncoupling: Drivers must have a thorough understanding of how to properly couple and uncouple their trailers to prevent accidents or damage to equipment.
5. Special endorsements: To operate double/triple trailers, drivers must have a CDL Doubles/Triples endorsement on their license. This endorsement requires additional training and testing to ensure that drivers have the necessary skills and knowledge to operate these vehicles safely.
It's important for drivers with a CDL Doubles/Triples endorsement to follow all regulations related to operating these vehicles in Oklahoma. Violating any of these regulations can result in fines, penalties, or even the suspension or revocation of your CDL license.
