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
1. Doubles combinations:
Explanation
Because doubles and triples are more vulnerable than singles to jackknifing and rolling over, drivers should look far ahead of their vehicles so they can react to hazards well in advance and slow down or change lanes gradually.
2. Using a helper when backing up a large vehicle is:
Explanation
Backing a CMV is always dangerous due to limited visibility, so using a helper to monitor your blind spots is encouraged whenever possible.
3. If using spring brakes when hauling a heavy load, a complete stop will:
Explanation
Spring brakes do not work on all axles. If your vehicle's spring brakes activate due to low pressure in an air brake system, your vehicle will need a longer distance to stop than usual, especially if you are carrying a heavy load.
4. If you doubt that you have enough space to safely drive under a bridge or sign, you should:
Explanation
If you are not certain that your vehicle will fit under overhead objects, you should slow down and take a different route, if possible.
5. What can happen if the exhaust system is not working properly?
Explanation
Leaks in an exhaust system are extremely dangerous because they may allow toxic fumes into the cab or sleeper berth, endangering drivers and passengers.
6. During a trip, landing gear should be:
Explanation
Landing gear, or trailer supports, should always be completely raised before a vehicle is driven. Landing gear that is not entirely raised could catch on railroad tracks or other hazards on the roadway.
7. Anti-Lock Braking Systems (ABS):
Explanation
An Anti-Lock Braking System (ABS) helps prevent wheels from locking up during a hard application of brakes.
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Frequently Asked Questions
To obtain a CDL Doubles/Triples endorsement in Oklahoma, you must follow these steps:
1. Obtain a Commercial Driver's License (CDL) - Before applying for the Doubles/Triples endorsement, you must first obtain a CDL by passing the required knowledge and skills tests.
2. Meet the eligibility requirements - To apply for the Doubles/Triples endorsement, you must meet the following eligibility requirements:
- Be at least 21 years old
- Hold a valid Oklahoma CDL
- Have a driving record free of serious traffic violations
- Pass a Department of Transportation (DOT) physical exam
3. Study the Oklahoma CDL Handbook - The Doubles/Triples endorsement requires that you have knowledge of the safe operation of vehicles with double or triple trailers. You can find this information in the Oklahoma CDL Handbook.
4. Schedule an appointment at a testing location - Contact your local Department of Public Safety (DPS) office to schedule an appointment for your Doubles/Triples endorsement test.
5. Pass the written knowledge test - The written knowledge test consists of 20 multiple-choice questions and you must answer at least 16 correctly to pass.
6. Pass the skills test - The skills test consists of a pre-trip inspection, basic vehicle control, and on-road driving test using a vehicle with double or triple trailers.
7. Pay the fee - The fee for adding a Doubles/Triples endorsement to your CDL is $5.
After passing both tests and paying the fee, your CDL will be updated to include the Doubles/Triples endorsement.
1. Obtain a Commercial Driver's License (CDL) - Before applying for the Doubles/Triples endorsement, you must first obtain a CDL by passing the required knowledge and skills tests.
2. Meet the eligibility requirements - To apply for the Doubles/Triples endorsement, you must meet the following eligibility requirements:
- Be at least 21 years old
- Hold a valid Oklahoma CDL
- Have a driving record free of serious traffic violations
- Pass a Department of Transportation (DOT) physical exam
3. Study the Oklahoma CDL Handbook - The Doubles/Triples endorsement requires that you have knowledge of the safe operation of vehicles with double or triple trailers. You can find this information in the Oklahoma CDL Handbook.
4. Schedule an appointment at a testing location - Contact your local Department of Public Safety (DPS) office to schedule an appointment for your Doubles/Triples endorsement test.
5. Pass the written knowledge test - The written knowledge test consists of 20 multiple-choice questions and you must answer at least 16 correctly to pass.
6. Pass the skills test - The skills test consists of a pre-trip inspection, basic vehicle control, and on-road driving test using a vehicle with double or triple trailers.
7. Pay the fee - The fee for adding a Doubles/Triples endorsement to your CDL is $5.
After passing both tests and paying the fee, your CDL will be updated to include the Doubles/Triples endorsement.
To obtain a CDL Doubles/Triples license in Oklahoma, you must meet the following requirements:
1. Age Requirement: You must be at least 21 years old to operate a commercial vehicle with double or triple trailers.
2. Valid CDL: You must hold a valid Oklahoma Commercial Driver's License (CDL).
3. Clean Driving Record: You must have a driving record free of serious traffic violations.
4. Medical Requirements: You must pass a Department of Transportation (DOT) physical exam to ensure that you are physically able to operate a commercial vehicle.
5. Knowledge Test: You must pass the Doubles/Triples endorsement written knowledge test that covers the safe operation of vehicles with double or triple trailers.
6. Skills Test: You must pass the Doubles/Triples endorsement skills test, which includes the pre-trip inspection, basic control skills, and on-road driving test using a vehicle with double or triple trailers.
7. Fees: You are required to pay a $5 fee to add the Doubles/Triples endorsement to your CDL.
Overall, meeting these requirements and passing the necessary tests will qualify you to obtain a CDL Doubles/Triples license in Oklahoma.
1. Age Requirement: You must be at least 21 years old to operate a commercial vehicle with double or triple trailers.
2. Valid CDL: You must hold a valid Oklahoma Commercial Driver's License (CDL).
3. Clean Driving Record: You must have a driving record free of serious traffic violations.
4. Medical Requirements: You must pass a Department of Transportation (DOT) physical exam to ensure that you are physically able to operate a commercial vehicle.
5. Knowledge Test: You must pass the Doubles/Triples endorsement written knowledge test that covers the safe operation of vehicles with double or triple trailers.
6. Skills Test: You must pass the Doubles/Triples endorsement skills test, which includes the pre-trip inspection, basic control skills, and on-road driving test using a vehicle with double or triple trailers.
7. Fees: You are required to pay a $5 fee to add the Doubles/Triples endorsement to your CDL.
Overall, meeting these requirements and passing the necessary tests will qualify you to obtain a CDL Doubles/Triples license in Oklahoma.
Yes, you need specific experience and training to obtain a CDL Doubles/Triples endorsement in Oklahoma.
According to the Oklahoma Department of Public Safety (DPS), before you can take the Doubles/Triples endorsement skills test, you must complete training in a vehicle with double or triple trailers.
This training must be provided by a qualified instructor and must cover the following topics:
1. Coupling and uncoupling of double or triple trailers
2. Inspecting double or triple trailers
3. Handling characteristics of double or triple trailers
4. Stopping distances and braking
5. Turning and backing with double or triple trailers
6. Safe driving practices with double or triple trailers
Moreover, while training is not mandatory, it is highly recommended that you enroll in a CDL training program to gain the knowledge and skills necessary to pass the CDL Doubles/Triples endorsement test.
The training program will cover all the necessary topics required for the CDL Doubles/Triples endorsement, including relevant laws and regulations, vehicle control, and safety procedures.
Overall, having adequate training and experience is critical to obtaining a CDL Doubles/Triples endorsement in Oklahoma.
According to the Oklahoma Department of Public Safety (DPS), before you can take the Doubles/Triples endorsement skills test, you must complete training in a vehicle with double or triple trailers.
This training must be provided by a qualified instructor and must cover the following topics:
1. Coupling and uncoupling of double or triple trailers
2. Inspecting double or triple trailers
3. Handling characteristics of double or triple trailers
4. Stopping distances and braking
5. Turning and backing with double or triple trailers
6. Safe driving practices with double or triple trailers
Moreover, while training is not mandatory, it is highly recommended that you enroll in a CDL training program to gain the knowledge and skills necessary to pass the CDL Doubles/Triples endorsement test.
The training program will cover all the necessary topics required for the CDL Doubles/Triples endorsement, including relevant laws and regulations, vehicle control, and safety procedures.
Overall, having adequate training and experience is critical to obtaining a CDL Doubles/Triples endorsement in Oklahoma.
Yes, to obtain the CDL Doubles/Triples endorsement in Oklahoma, you must pass a written test in addition to the standard CDL knowledge test. The Doubles/Triples endorsement written test is designed to assess your knowledge and understanding of the safe operation of vehicles with double or triple trailers.
The written test will cover the following topics:
1. Inspecting Double and Triple Trailers
2. Couple and Uncouple Double and Triple Trailers
3. Maintenance of Control
4. Safe Driving Practices
Furthermore, you will need to answer at least 80% of the questions correctly in order to pass the written test and obtain the Doubles/Triples endorsement.
It is important to note that you must pass this written test before you can take the Doubles/Triples endorsement skills test, which will assess your ability to safely operate a vehicle with double or triple trailers.
Overall, passing both the Doubles/Triples endorsement knowledge test and skills test is necessary to obtain the CDL Doubles/Triples endorsement in Oklahoma.
The written test will cover the following topics:
1. Inspecting Double and Triple Trailers
2. Couple and Uncouple Double and Triple Trailers
3. Maintenance of Control
4. Safe Driving Practices
Furthermore, you will need to answer at least 80% of the questions correctly in order to pass the written test and obtain the Doubles/Triples endorsement.
It is important to note that you must pass this written test before you can take the Doubles/Triples endorsement skills test, which will assess your ability to safely operate a vehicle with double or triple trailers.
Overall, passing both the Doubles/Triples endorsement knowledge test and skills test is necessary to obtain the CDL Doubles/Triples endorsement in Oklahoma.
To obtain the CDL Doubles/Triples endorsement in Oklahoma, you will need to pass a skills test that includes specific maneuvers that demonstrate your ability to safely operate a vehicle with double or triple trailers.
The skills test will involve the following maneuvers:
1. Pre-Trip Inspection: You will need to inspect your vehicle and ensure that all equipment is in good working condition.
2. Coupling and Uncoupling: You will need to couple and uncouple the trailers correctly and safely.
3. Straight Line Backing: You will need to back up your vehicle with double or triple trailers in a straight line for a specified distance.
4. Offset Back/Parallel Parking: You will need to back up your vehicle with double or triple trailers into a space that is offset or parallel parked.
5. Alley Dock: You will need to back up your vehicle with double or triple trailers into a space that simulates an alley dock.
6. On-Road Driving: You will need to demonstrate your ability to safely operate your vehicle with double or triple trailers on public roads and highways.
It is important to note that during the skills test, you will be evaluated on your ability to follow proper safety procedures, use appropriate signals, and maintain control of your vehicle at all times.
Overall, passing the CDL Doubles/Triples endorsement skills test requires adequate training, knowledge, and experience in operating vehicles with double or triple trailers, as well as a strong understanding of safety rules and regulations.
The skills test will involve the following maneuvers:
1. Pre-Trip Inspection: You will need to inspect your vehicle and ensure that all equipment is in good working condition.
2. Coupling and Uncoupling: You will need to couple and uncouple the trailers correctly and safely.
3. Straight Line Backing: You will need to back up your vehicle with double or triple trailers in a straight line for a specified distance.
4. Offset Back/Parallel Parking: You will need to back up your vehicle with double or triple trailers into a space that is offset or parallel parked.
5. Alley Dock: You will need to back up your vehicle with double or triple trailers into a space that simulates an alley dock.
6. On-Road Driving: You will need to demonstrate your ability to safely operate your vehicle with double or triple trailers on public roads and highways.
It is important to note that during the skills test, you will be evaluated on your ability to follow proper safety procedures, use appropriate signals, and maintain control of your vehicle at all times.
Overall, passing the CDL Doubles/Triples endorsement skills test requires adequate training, knowledge, and experience in operating vehicles with double or triple trailers, as well as a strong understanding of safety rules and regulations.
No, you cannot legally operate a commercial motor vehicle with double or triple trailers without a CDL Doubles/Triples endorsement in Oklahoma. The Federal Motor Carrier Safety Administration (FMCSA) requires all drivers of commercial motor vehicles with double or triple trailers to hold a valid CDL with the Doubles/Triples endorsement.
The Doubles/Triples endorsement indicates that you have passed the necessary knowledge and skills tests to safely operate a commercial motor vehicle with double or triple trailers. Without this endorsement, you are not legally authorized to operate such vehicles.
Furthermore, operating a commercial motor vehicle without the appropriate CDL and endorsements can result in fines, penalties, and even suspension or revocation of your driving privileges. It is important to obtain the necessary endorsements and comply with all CDL requirements to ensure compliance with all state and federal regulations and promote safe driving practices.
The Doubles/Triples endorsement indicates that you have passed the necessary knowledge and skills tests to safely operate a commercial motor vehicle with double or triple trailers. Without this endorsement, you are not legally authorized to operate such vehicles.
Furthermore, operating a commercial motor vehicle without the appropriate CDL and endorsements can result in fines, penalties, and even suspension or revocation of your driving privileges. It is important to obtain the necessary endorsements and comply with all CDL requirements to ensure compliance with all state and federal regulations and promote safe driving practices.
In Oklahoma, you can add the CDL Doubles/Triples endorsement to your existing CDL license by passing the required knowledge and skills tests and paying the appropriate fees. You will not need to apply for a new license.
To add the Doubles/Triples endorsement to your CDL license, you will need to:
1. Study the Oklahoma CDL Manual and specifically focus on the sections related to double/triple trailers.
2. Pass the Doubles/Triples endorsement knowledge test. This test will cover topics such as inspecting double/triple trailers, coupling/uncoupling, and safe driving practices.
3. Pass the Doubles/Triples endorsement skills test. This skills test will evaluate your ability to safely operate a commercial motor vehicle with double or triple trailers.
4. Pay the appropriate fee for adding the endorsement to your CDL license.
Once you have passed both tests and paid the fee, the Oklahoma Department of Public Safety (DPS) will add the Doubles/Triples endorsement to your existing CDL license.
It is important to note that you must already hold a valid CDL license in order to add any endorsements, including the Doubles/Triples endorsement.
To add the Doubles/Triples endorsement to your CDL license, you will need to:
1. Study the Oklahoma CDL Manual and specifically focus on the sections related to double/triple trailers.
2. Pass the Doubles/Triples endorsement knowledge test. This test will cover topics such as inspecting double/triple trailers, coupling/uncoupling, and safe driving practices.
3. Pass the Doubles/Triples endorsement skills test. This skills test will evaluate your ability to safely operate a commercial motor vehicle with double or triple trailers.
4. Pay the appropriate fee for adding the endorsement to your CDL license.
Once you have passed both tests and paid the fee, the Oklahoma Department of Public Safety (DPS) will add the Doubles/Triples endorsement to your existing CDL license.
It is important to note that you must already hold a valid CDL license in order to add any endorsements, including the Doubles/Triples endorsement.
Yes, drivers with a CDL Doubles/Triples endorsement are subject to certain restrictions and limitations in Oklahoma.
One important restriction is that drivers with a Doubles/Triples endorsement are only authorized to operate commercial motor vehicles with double or triple trailers that fall within the weight and length limits set by the state. In Oklahoma, the maximum combination weight for double or triple trailers is 80,000 pounds, and the maximum length is 28 feet per trailer.
Additionally, drivers with a Doubles/Triples endorsement must adhere to all other state and federal regulations for commercial motor vehicles, including hours of service requirements, vehicle maintenance standards, and rules for securing cargo.
It is also important to note that the Doubles/Triples endorsement is not valid for operating other types of commercial motor vehicles. For example, if you want to operate a tanker truck or a hazardous materials vehicle, you will need to obtain additional endorsements on your CDL license.
Finally, it is worth emphasizing that operating a commercial motor vehicle with double or triple trailers requires specialized knowledge and skills in order to do so safely. It is important for drivers with a Doubles/Triples endorsement to receive proper training and continue to practice safe driving habits in order to prevent accidents and ensure compliance with all state and federal regulations.
One important restriction is that drivers with a Doubles/Triples endorsement are only authorized to operate commercial motor vehicles with double or triple trailers that fall within the weight and length limits set by the state. In Oklahoma, the maximum combination weight for double or triple trailers is 80,000 pounds, and the maximum length is 28 feet per trailer.
Additionally, drivers with a Doubles/Triples endorsement must adhere to all other state and federal regulations for commercial motor vehicles, including hours of service requirements, vehicle maintenance standards, and rules for securing cargo.
It is also important to note that the Doubles/Triples endorsement is not valid for operating other types of commercial motor vehicles. For example, if you want to operate a tanker truck or a hazardous materials vehicle, you will need to obtain additional endorsements on your CDL license.
Finally, it is worth emphasizing that operating a commercial motor vehicle with double or triple trailers requires specialized knowledge and skills in order to do so safely. It is important for drivers with a Doubles/Triples endorsement to receive proper training and continue to practice safe driving habits in order to prevent accidents and ensure compliance with all state and federal regulations.
In Oklahoma, the maximum weight and length limits for double/triple trailers that can be operated with a CDL Doubles/Triples endorsement are as follows:
- Maximum combination weight: 80,000 pounds
- Maximum length per trailer: 28 feet
It is important to note that these weight and length limits apply specifically to double/triple trailers, and other types of commercial motor vehicles may have different size and weight restrictions.
Additionally, drivers with a CDL Doubles/Triples endorsement are required to comply with all state and federal regulations related to commercial motor vehicles, including rules regarding vehicle maintenance, cargo securement, and hours of service.
It is important for drivers with a Doubles/Triples endorsement to receive proper training and continue to practice safe driving habits in order to prevent accidents and ensure compliance with all applicable laws and regulations.
- Maximum combination weight: 80,000 pounds
- Maximum length per trailer: 28 feet
It is important to note that these weight and length limits apply specifically to double/triple trailers, and other types of commercial motor vehicles may have different size and weight restrictions.
Additionally, drivers with a CDL Doubles/Triples endorsement are required to comply with all state and federal regulations related to commercial motor vehicles, including rules regarding vehicle maintenance, cargo securement, and hours of service.
It is important for drivers with a Doubles/Triples endorsement to receive proper training and continue to practice safe driving habits in order to prevent accidents and ensure compliance with all applicable laws and regulations.
Yes, there are specific safety considerations and regulations that drivers with a CDL Doubles/Triples endorsement must follow when driving double/triple trailers. Here are some of the key considerations:
1. Proper Loading and Securement - Double/triple trailers require proper loading and securement of cargo, which means that drivers must ensure that the weight is distributed evenly and that all cargo is properly secured to prevent shifting or falling off during transport.
2. Maneuvering and Turning - Double/triple trailers require additional space for maneuvering and turning, which means that drivers must be careful when making turns, especially sharp turns, and be aware of potential obstacles or hazards in their path.
3. Braking - Double/triple trailers require longer stopping distances due to their weight and size, which means that drivers must allow for additional space when braking or stopping.
4. Specialized Training - Driving double/triple trailers requires specialized knowledge and skills, which means that drivers with a Doubles/Triples endorsement should receive proper training before operating these types of vehicles.
5. Compliance with Regulations - Drivers with a Doubles/Triples endorsement must comply with all state and federal regulations related to commercial motor vehicles, including rules regarding vehicle maintenance, hours of service, inspection requirements, and more.
Overall, it is essential for drivers with a CDL Doubles/Triples endorsement to exercise caution and follow all applicable safety regulations in order to prevent accidents and ensure compliance with the law.
1. Proper Loading and Securement - Double/triple trailers require proper loading and securement of cargo, which means that drivers must ensure that the weight is distributed evenly and that all cargo is properly secured to prevent shifting or falling off during transport.
2. Maneuvering and Turning - Double/triple trailers require additional space for maneuvering and turning, which means that drivers must be careful when making turns, especially sharp turns, and be aware of potential obstacles or hazards in their path.
3. Braking - Double/triple trailers require longer stopping distances due to their weight and size, which means that drivers must allow for additional space when braking or stopping.
4. Specialized Training - Driving double/triple trailers requires specialized knowledge and skills, which means that drivers with a Doubles/Triples endorsement should receive proper training before operating these types of vehicles.
5. Compliance with Regulations - Drivers with a Doubles/Triples endorsement must comply with all state and federal regulations related to commercial motor vehicles, including rules regarding vehicle maintenance, hours of service, inspection requirements, and more.
Overall, it is essential for drivers with a CDL Doubles/Triples endorsement to exercise caution and follow all applicable safety regulations in order to prevent accidents and ensure compliance with the law.
