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 South Dakota 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. If there is ice on the front of your side mirror:
Explanation
If your mirrors or wiper blades become icy while you are driving, you can expect the road surface to be icy as well.
2. Why should the steps of a pre-trip inspection be done in the same order each time?
Explanation
Doing an inspection the same way every time will help you learn the necessary steps. You will be less likely to forget a step if you get into a routine.
3. When should the trailer hand valve be used?
Explanation
The trailer hand valve, also called the trolley valve or Johnson bar, is used to work the trailer brakes. It should be used only to test the brakes. Using it while a vehicle is in motion could cause a skid.
4. When near a railroad crossing:
Explanation
You should never assume that you will hear an approaching train. The train operator may fail to sound the horn, or the use of a train's horn may be prohibited in a specific area. Even if the train does sound its horn, noise from inside your own vehicle may prevent you from hearing the train until it is dangerously close.
5. When driving a vehicle equipped with an Anti-Lock Braking System (ABS), you should:
Explanation
When driving a tractor-trailer combination that is equipped with an Anti-Lock Braking System (ABS), you should brake in the same manner that you would if the vehicle was not equipped with ABS.
6. When driving in fog, you should:
Explanation
If you must drive in fog, you should use your low beam headlights and fog lights to maximize your visibility. Using high beam lights will only make it more difficult for you to see.
7. When inspecting the exhaust system, which of the following should not cause concern?
Explanation
When inspecting a vehicle's exhaust system, be alert to a number of potential problems, including loose, broken, or missing exhaust pipes, mufflers, tailpipes, or vertical stacks; loose, broken, or missing mounting brackets, clamps, bolts, or nuts; exhaust system parts rubbing against fuel system parts, tires, or other moving parts of the vehicle; and exhaust system parts that are leaking.
Ranked by best match
Frequently Asked Questions
To obtain a CDL Doubles/Triples endorsement in South Dakota, follow these steps:
1. Obtain a South Dakota commercial driver's license (CDL) by passing the CDL knowledge and skills tests. You must already have a valid CDL to apply for the Doubles/Triples endorsement.
2. Study the South Dakota CDL Manual, paying particular attention to the section on Doubles/Triples.
3. Schedule an appointment at a South Dakota Department of Public Safety (DPS) exam station to take the Doubles/Triples endorsement knowledge test. You will need to bring your current CDL and pay the required fee.
4. Pass the Doubles/Triples endorsement knowledge test with a score of 80% or higher.
5. Schedule an appointment at a South Dakota DPS exam station to take the Doubles/Triples endorsement skills test. You will need to bring your own tractor-trailer combination that meets state and federal regulations, as well as proof of insurance.
6. Pass the Doubles/Triples endorsement skills test with a score of 80% or higher.
7. Pay the required fee for the Doubles/Triples endorsement at the time you apply for it.
Once you have completed these steps and received your CDL with Doubles/Triples endorsement, you will be authorized to operate commercial vehicles with two or three trailers attached, subject to any additional restrictions or requirements that may apply based on your particular circumstances.
1. Obtain a South Dakota commercial driver's license (CDL) by passing the CDL knowledge and skills tests. You must already have a valid CDL to apply for the Doubles/Triples endorsement.
2. Study the South Dakota CDL Manual, paying particular attention to the section on Doubles/Triples.
3. Schedule an appointment at a South Dakota Department of Public Safety (DPS) exam station to take the Doubles/Triples endorsement knowledge test. You will need to bring your current CDL and pay the required fee.
4. Pass the Doubles/Triples endorsement knowledge test with a score of 80% or higher.
5. Schedule an appointment at a South Dakota DPS exam station to take the Doubles/Triples endorsement skills test. You will need to bring your own tractor-trailer combination that meets state and federal regulations, as well as proof of insurance.
6. Pass the Doubles/Triples endorsement skills test with a score of 80% or higher.
7. Pay the required fee for the Doubles/Triples endorsement at the time you apply for it.
Once you have completed these steps and received your CDL with Doubles/Triples endorsement, you will be authorized to operate commercial vehicles with two or three trailers attached, subject to any additional restrictions or requirements that may apply based on your particular circumstances.
To obtain a CDL Doubles/Triples license in South Dakota, you must meet the following requirements:
1. Be at least 18 years old to drive within the state of South Dakota or 21 years old to drive interstate.
2. Hold a valid South Dakota commercial driver's license (CDL) or apply for one at the same time.
3. Pass a knowledge test on double/triple trailer safety, operation and coupling/uncoupling procedures.
4. Pass a skills test in a vehicle that represents the type of double/triple commercial vehicle you will be driving.
5. Have no prior disqualifying criminal offenses.
6. Meet medical certification requirements based on the type of driving you will be doing.
7. Pay the required fees for testing and licensing.
It is important to note that additional endorsements may be required for certain types of cargo or commercial vehicles, and there may be additional training or testing requirements based on your specific circumstances.
1. Be at least 18 years old to drive within the state of South Dakota or 21 years old to drive interstate.
2. Hold a valid South Dakota commercial driver's license (CDL) or apply for one at the same time.
3. Pass a knowledge test on double/triple trailer safety, operation and coupling/uncoupling procedures.
4. Pass a skills test in a vehicle that represents the type of double/triple commercial vehicle you will be driving.
5. Have no prior disqualifying criminal offenses.
6. Meet medical certification requirements based on the type of driving you will be doing.
7. Pay the required fees for testing and licensing.
It is important to note that additional endorsements may be required for certain types of cargo or commercial vehicles, and there may be additional training or testing requirements based on your specific circumstances.
Yes, you may need specific experience or training to obtain a CDL Doubles/Triples endorsement in South Dakota. The state of South Dakota requires you to have a valid CDL before you can apply for the Doubles/Triples endorsement.
In addition to possessing a CDL, it is recommended that you have some experience driving commercial vehicles before attempting to obtain an endorsement for double/triple trailers. This will help ensure that you have the necessary skills and knowledge to safely operate these larger and more complex vehicles.
Some training programs may also be available to help prepare you for the Doubles/Triples endorsement. These programs may cover topics such as coupling and uncoupling procedures, weight distribution, and other safety considerations specific to double/triple trailers.
It is also important to note that some employers may require additional training or experience beyond what is required by the state of South Dakota before they will allow you to operate commercial vehicles with double/triple trailers.
In addition to possessing a CDL, it is recommended that you have some experience driving commercial vehicles before attempting to obtain an endorsement for double/triple trailers. This will help ensure that you have the necessary skills and knowledge to safely operate these larger and more complex vehicles.
Some training programs may also be available to help prepare you for the Doubles/Triples endorsement. These programs may cover topics such as coupling and uncoupling procedures, weight distribution, and other safety considerations specific to double/triple trailers.
It is also important to note that some employers may require additional training or experience beyond what is required by the state of South Dakota before they will allow you to operate commercial vehicles with double/triple trailers.
Yes, there is an additional written test that you must pass to obtain a CDL Doubles/Triples endorsement in South Dakota. You will need to pass the Doubles/Triples endorsement knowledge test, which covers topics such as:
1. Coupling and uncoupling procedures for double/triple trailers
2. Inspecting double/triple trailers for safety and compliance
3. Adjusting weight distribution for double/triple trailers
4. Maneuvering double/triple trailers safely on the road
5. Responding to emergency situations while driving double/triple trailers
To prepare for the Doubles/Triples endorsement knowledge test, you can study the South Dakota Commercial Driver License Manual, which includes information on all of the topics listed above. You can also find practice tests online or through commercial driving schools to help you prepare for the exam.
It is important to note that passing the Doubles/Triples endorsement knowledge test is only one of the requirements for obtaining a CDL Doubles/Triples endorsement in South Dakota. You will also need to pass a skills test in a vehicle that represents the type of double/triple commercial vehicle you will be driving, as well as meet other requirements such as age, medical certification, and criminal background checks.
1. Coupling and uncoupling procedures for double/triple trailers
2. Inspecting double/triple trailers for safety and compliance
3. Adjusting weight distribution for double/triple trailers
4. Maneuvering double/triple trailers safely on the road
5. Responding to emergency situations while driving double/triple trailers
To prepare for the Doubles/Triples endorsement knowledge test, you can study the South Dakota Commercial Driver License Manual, which includes information on all of the topics listed above. You can also find practice tests online or through commercial driving schools to help you prepare for the exam.
It is important to note that passing the Doubles/Triples endorsement knowledge test is only one of the requirements for obtaining a CDL Doubles/Triples endorsement in South Dakota. You will also need to pass a skills test in a vehicle that represents the type of double/triple commercial vehicle you will be driving, as well as meet other requirements such as age, medical certification, and criminal background checks.
To obtain a CDL Doubles/Triples endorsement in South Dakota, you must pass a skills test that includes specific maneuvers and skills related to driving double/triple trailers. The skills test will typically include the following components:
1. Vehicle inspection: You will need to demonstrate your ability to inspect a double/triple trailer for safety and compliance with state and federal regulations.
2. Basic control skills: You will need to demonstrate your ability to control a double/triple trailer in a variety of situations, including straight line backing, offset backing, and parallel parking.
3. On-road driving: You will need to demonstrate your ability to safely operate a double/triple trailer on the road, including turning, merging, shifting gears, and responding to traffic signals and other road signs.
4. Coupling and uncoupling: You will need to demonstrate your ability to couple and uncouple a double/triple trailer safely and correctly.
During the skills test, you will be evaluated by a licensed examiner who will score your performance on each of these components. In order to pass the test and obtain your Doubles/Triples endorsement, you must score at least 80% on each component.
It is important to note that the specific maneuvers and skills required for the Doubles/Triples endorsement skills test may vary depending on the type of vehicle you will be driving. For example, if you will be driving combination vehicles with air brakes, you may also need to pass an air brakes endorsement test in addition to the Doubles/Triples endorsement knowledge test.
1. Vehicle inspection: You will need to demonstrate your ability to inspect a double/triple trailer for safety and compliance with state and federal regulations.
2. Basic control skills: You will need to demonstrate your ability to control a double/triple trailer in a variety of situations, including straight line backing, offset backing, and parallel parking.
3. On-road driving: You will need to demonstrate your ability to safely operate a double/triple trailer on the road, including turning, merging, shifting gears, and responding to traffic signals and other road signs.
4. Coupling and uncoupling: You will need to demonstrate your ability to couple and uncouple a double/triple trailer safely and correctly.
During the skills test, you will be evaluated by a licensed examiner who will score your performance on each of these components. In order to pass the test and obtain your Doubles/Triples endorsement, you must score at least 80% on each component.
It is important to note that the specific maneuvers and skills required for the Doubles/Triples endorsement skills test may vary depending on the type of vehicle you will be driving. For example, if you will be driving combination vehicles with air brakes, you may also need to pass an air brakes endorsement test in addition to the Doubles/Triples endorsement knowledge test.
No, you cannot operate double/triple trailers without a CDL Doubles/Triples endorsement. In South Dakota, a Doubles/Triples endorsement is required if you want to operate a commercial motor vehicle (CMV) that consists of two or three trailers connected to one power unit.
Driving a double/triple trailer without the proper endorsement can result in serious consequences, including fines and penalties, and could potentially put yourself and others on the road at risk. Therefore, it is important to obtain the proper CDL endorsement and training before operating any commercial vehicle.
To obtain a Doubles/Triples endorsement, you must pass both a knowledge test and a skills test. You must also meet other requirements such as age, medical certification, and criminal background checks. Once you have obtained your Doubles/Triples endorsement, you will be authorized to operate double/triple trailers that meet the weight and length restrictions set by federal and state regulations.
It is important to note that the requirements for obtaining a CDL Doubles/Triples endorsement may vary depending on the state where you are obtaining your CDL. Therefore, it is important to check with your local Department of Motor Vehicles (DMV) or licensing agency to ensure that you have met all of the requirements for obtaining a Doubles/Triples endorsement in your state.
Driving a double/triple trailer without the proper endorsement can result in serious consequences, including fines and penalties, and could potentially put yourself and others on the road at risk. Therefore, it is important to obtain the proper CDL endorsement and training before operating any commercial vehicle.
To obtain a Doubles/Triples endorsement, you must pass both a knowledge test and a skills test. You must also meet other requirements such as age, medical certification, and criminal background checks. Once you have obtained your Doubles/Triples endorsement, you will be authorized to operate double/triple trailers that meet the weight and length restrictions set by federal and state regulations.
It is important to note that the requirements for obtaining a CDL Doubles/Triples endorsement may vary depending on the state where you are obtaining your CDL. Therefore, it is important to check with your local Department of Motor Vehicles (DMV) or licensing agency to ensure that you have met all of the requirements for obtaining a Doubles/Triples endorsement in your state.
You can add the CDL Doubles/Triples endorsement to your existing CDL license. In South Dakota, to add the endorsement, you must pass a knowledge test and a skills test specifically for double/triple trailer operation.
To add the endorsement, you will need to visit your local Department of Motor Vehicles (DMV) office and provide the necessary documentation, including your current CDL license, proof of identity, and proof of residency. You will also need to pay any fees required by the DMV.
Once you have passed the required tests and provided all necessary documentation and fees, the Doubles/Triples endorsement will be added to your existing CDL license. The endorsement will have an expiration date that matches the expiration date of your CDL license.
It is important to note that adding a Doubles/Triples endorsement may also require additional training or certification. Therefore, it is important to check with your employer or a reputable CDL training school to ensure that you have received all necessary training before attempting to add the endorsement to your CDL license.
To add the endorsement, you will need to visit your local Department of Motor Vehicles (DMV) office and provide the necessary documentation, including your current CDL license, proof of identity, and proof of residency. You will also need to pay any fees required by the DMV.
Once you have passed the required tests and provided all necessary documentation and fees, the Doubles/Triples endorsement will be added to your existing CDL license. The endorsement will have an expiration date that matches the expiration date of your CDL license.
It is important to note that adding a Doubles/Triples endorsement may also require additional training or certification. Therefore, it is important to check with your employer or a reputable CDL training school to ensure that you have received all necessary training before attempting to add the endorsement to your CDL license.
Yes, there are restrictions and limitations for drivers with a CDL Doubles/Triples endorsement in South Dakota. These restrictions and limitations are in place to ensure the safe operation of double/triple trailer vehicles on the roadways.
Here are some of the common restrictions and limitations that apply to CDL drivers with a Doubles/Triples endorsement:
1. Weight limits: The total weight of the double/triple trailer vehicle cannot exceed the maximum weight limit allowed by state and federal regulations.
2. Length limits: The total length of the double/triple trailer vehicle cannot exceed the maximum length limit allowed by state and federal regulations.
3. Type of cargo: Some types of cargo may not be allowed to be transported using double/triple trailers, depending on state and federal regulations.
4. Driving conditions: Drivers with a Doubles/Triples endorsement must be aware of driving conditions that can affect the safe operation of their vehicle, such as high winds, steep grades, and curves.
5. Special maneuvers: Special driving maneuvers may be required when operating a double/triple trailer vehicle, such as making turns or backing up.
It is important for CDL drivers with a Doubles/Triples endorsement to be aware of these restrictions and limitations and to follow all applicable state and federal regulations when operating their vehicles. Failure to follow these regulations can result in fines, penalties, or even the suspension or revocation of your CDL license.
Here are some of the common restrictions and limitations that apply to CDL drivers with a Doubles/Triples endorsement:
1. Weight limits: The total weight of the double/triple trailer vehicle cannot exceed the maximum weight limit allowed by state and federal regulations.
2. Length limits: The total length of the double/triple trailer vehicle cannot exceed the maximum length limit allowed by state and federal regulations.
3. Type of cargo: Some types of cargo may not be allowed to be transported using double/triple trailers, depending on state and federal regulations.
4. Driving conditions: Drivers with a Doubles/Triples endorsement must be aware of driving conditions that can affect the safe operation of their vehicle, such as high winds, steep grades, and curves.
5. Special maneuvers: Special driving maneuvers may be required when operating a double/triple trailer vehicle, such as making turns or backing up.
It is important for CDL drivers with a Doubles/Triples endorsement to be aware of these restrictions and limitations and to follow all applicable state and federal regulations when operating their vehicles. Failure to follow these regulations can result in fines, penalties, or even the suspension or revocation of your CDL license.
The maximum weight and length limits for double/triple trailers with a CDL Doubles/Triples endorsement in South Dakota are determined by state and federal regulations.
Here are the maximum weight and length limits for double/triple trailers in South Dakota:
1. Maximum weight: The maximum gross weight (weight of the vehicle plus its load) for double/triple trailers is 80,000 pounds, which is the same as the weight limit for most other commercial vehicles.
2. Maximum length: The maximum length for double/triple trailers is 28 feet for each trailer, or a total of 84 feet, including the tractor.
It is important to note that these weight and length limits may vary depending on the type of cargo being transported, as well as other state and federal regulations. CDL drivers with a Doubles/Triples endorsement should be aware of these limits and follow all applicable rules and regulations to ensure safe operation of their vehicles on the roadways.
Here are the maximum weight and length limits for double/triple trailers in South Dakota:
1. Maximum weight: The maximum gross weight (weight of the vehicle plus its load) for double/triple trailers is 80,000 pounds, which is the same as the weight limit for most other commercial vehicles.
2. Maximum length: The maximum length for double/triple trailers is 28 feet for each trailer, or a total of 84 feet, including the tractor.
It is important to note that these weight and length limits may vary depending on the type of cargo being transported, as well as other state and federal regulations. CDL drivers with a Doubles/Triples endorsement should be aware of these limits and follow all applicable rules and regulations to ensure safe operation of their vehicles on the roadways.
Yes, there are specific safety considerations and regulations for driving double/triple trailers with a CDL Doubles/Triples endorsement in South Dakota. These regulations are in place to ensure the safe operation of these vehicles on the roadways.
Here are some of the specific safety considerations and regulations for driving double/triple trailers:
1. Special maneuvers: CDL drivers with a Doubles/Triples endorsement must be able to perform special driving maneuvers, such as making turns and backing up, to operate double/triple trailers safely.
2. Coupling and uncoupling: CDL drivers must be able to properly couple and uncouple double/triple trailers to ensure that they are securely attached.
3. Weight distribution: Proper weight distribution is critical when operating double/triple trailers, as unbalanced weight can cause the vehicle to become unstable and difficult to control.
4. Speed limits: CDL drivers with a Doubles/Triples endorsement must adhere to posted speed limits and adjust their driving speed based on factors such as weather conditions, road conditions, traffic volume, and the weight of the vehicle.
5. Braking distance: Double/triple trailers require a longer braking distance than single trailers due to their increased weight and length. CDL drivers must be aware of this increased stopping distance and adjust their following distance accordingly.
6. Turning radius: Double/triple trailers have a wider turning radius than single trailers, which means that CDL drivers must be aware of their surroundings and make wider turns to avoid hitting other vehicles or objects.
It is important for CDL drivers with a Doubles/Triples endorsement to be aware of these safety considerations and regulations and to follow all applicable state and federal rules when operating their vehicles. Failure to follow these rules can result in fines, penalties, or even the suspension or revocation of your CDL license.
Here are some of the specific safety considerations and regulations for driving double/triple trailers:
1. Special maneuvers: CDL drivers with a Doubles/Triples endorsement must be able to perform special driving maneuvers, such as making turns and backing up, to operate double/triple trailers safely.
2. Coupling and uncoupling: CDL drivers must be able to properly couple and uncouple double/triple trailers to ensure that they are securely attached.
3. Weight distribution: Proper weight distribution is critical when operating double/triple trailers, as unbalanced weight can cause the vehicle to become unstable and difficult to control.
4. Speed limits: CDL drivers with a Doubles/Triples endorsement must adhere to posted speed limits and adjust their driving speed based on factors such as weather conditions, road conditions, traffic volume, and the weight of the vehicle.
5. Braking distance: Double/triple trailers require a longer braking distance than single trailers due to their increased weight and length. CDL drivers must be aware of this increased stopping distance and adjust their following distance accordingly.
6. Turning radius: Double/triple trailers have a wider turning radius than single trailers, which means that CDL drivers must be aware of their surroundings and make wider turns to avoid hitting other vehicles or objects.
It is important for CDL drivers with a Doubles/Triples endorsement to be aware of these safety considerations and regulations and to follow all applicable state and federal rules when operating their vehicles. Failure to follow these rules can result in fines, penalties, or even the suspension or revocation of your CDL license.
