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 two, three or four possible answer choices. Test questions come from the Minnesota Commercial Driver’s Manual. Questions come from chapters covering: Driving Safely, Cargo, 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
15. Without engine oil:
Explanation
It is critical that an engine have sufficient oil pressure. The engine can be destroyed rapidly if run without oil.
16. When a vehicle with multiple trailers makes a turn, the rearmost wheels follow a slightly different path than the front wheels.
Explanation
When a vehicle turns, its rear wheels follow a different path than its front wheels. This is referred to as off-tracking.
17. The radiator cap:
Explanation
Never remove the radiator cap or any part of the pressurized cooling system until it has cooled. Opening the cap while the system is too hot could release steam and boiling water that could severely burn you. If the radiator cap is cool to the touch, the system is likely cool enough for you to open the cap.
18. What is the minimum number of tie-downs required to secure a 10-foot piece of cargo?
Explanation
On flatbed trailers and trailers without sides, cargo must be tied down. There should be at least one tie-down for every 10 feet of cargo. Regardless of the size of the cargo, at least two tie-downs must be used.
19. A one-way check valve:
Explanation
A one-way check valve is required to be between an air compressor and the first main reservoir. This valve prevents air from escaping the system if the air compressor develops a leak.
20. To help your vehicle be seen by others:
Explanation
When driving at night, it is important that your lights be clean so that they provide as much light as possible. This will help others to see your vehicle.
Frequently Asked Questions
To obtain a CDL Doubles/Triples endorsement in Minnesota, follow these steps:
1. Review the Minnesota CDL Manual: Before applying for a Doubles/Triples endorsement, you must pass the CDL knowledge test. Review the CDL manual to prepare for the test.
2. Pass the Doubles/Triples Knowledge Test: Schedule an appointment at a Minnesota DVS exam station to take the CDL Doubles/Triples knowledge test. You must pass this test to obtain the endorsement.
3. Meet the Requirements: To apply for a CDL Doubles/Triples endorsement, you must have a valid Minnesota Class A CDL and meet all federal and state requirements.
4. Submit Application & Fees: Complete and submit an application for a Commercial Driver’s License, along with any required fees, at a Minnesota DVS exam station.
5. Pass a Skills Test: Schedule and pass a Doubles/Triples skills test with an authorized third-party testing organization or Minnesota DVS exam station.
6. Receive Your Endorsement: Once you have passed the knowledge and skills tests, your new endorsement will be added to your Minnesota Commercial Driver’s License.
Note: You must renew your endorsement every four years by passing the knowledge test again.
1. Review the Minnesota CDL Manual: Before applying for a Doubles/Triples endorsement, you must pass the CDL knowledge test. Review the CDL manual to prepare for the test.
2. Pass the Doubles/Triples Knowledge Test: Schedule an appointment at a Minnesota DVS exam station to take the CDL Doubles/Triples knowledge test. You must pass this test to obtain the endorsement.
3. Meet the Requirements: To apply for a CDL Doubles/Triples endorsement, you must have a valid Minnesota Class A CDL and meet all federal and state requirements.
4. Submit Application & Fees: Complete and submit an application for a Commercial Driver’s License, along with any required fees, at a Minnesota DVS exam station.
5. Pass a Skills Test: Schedule and pass a Doubles/Triples skills test with an authorized third-party testing organization or Minnesota DVS exam station.
6. Receive Your Endorsement: Once you have passed the knowledge and skills tests, your new endorsement will be added to your Minnesota Commercial Driver’s License.
Note: You must renew your endorsement every four years by passing the knowledge test again.
To obtain a CDL Doubles/Triples license in Minnesota, you must meet the following requirements:
1. Age Requirement: You must be at least 18 years old to operate a commercial vehicle within Minnesota and 21 years old to cross state lines.
2. Valid Driver's License: You must possess a valid Minnesota driver's license.
3. Medical Certificate: You must provide a current and valid Medical Examiner's Certificate, which indicates that you are physically qualified to operate a commercial vehicle.
4. Minnesota Residency: You must provide proof of your Minnesota residency or provide proof of residency in another state and obtain a waiver from that state.
5. Commercial Learner's Permit (CLP): You must hold a valid Minnesota Commercial Learner's Permit (CLP) for at least 14 days before taking the CDL skills test.
6. Pass Knowledge Tests: You must pass the CDL general knowledge test and the Doubles/Triples endorsement knowledge test.
7. Pass Skills Test: You must pass the CDL Doubles/Triples skills test, which includes a pre-trip inspection, basic vehicle control, and on-road driving test in a vehicle with Doubles/Triples attached.
Note that additional requirements may apply depending on your specific situation and the type of commercial vehicle you plan to operate with Doubles/Triples attached. It's important to review the Minnesota CDL Manual and consult with the Minnesota Department of Public Safety for more information on obtaining a CDL Doubles/Triples license.
1. Age Requirement: You must be at least 18 years old to operate a commercial vehicle within Minnesota and 21 years old to cross state lines.
2. Valid Driver's License: You must possess a valid Minnesota driver's license.
3. Medical Certificate: You must provide a current and valid Medical Examiner's Certificate, which indicates that you are physically qualified to operate a commercial vehicle.
4. Minnesota Residency: You must provide proof of your Minnesota residency or provide proof of residency in another state and obtain a waiver from that state.
5. Commercial Learner's Permit (CLP): You must hold a valid Minnesota Commercial Learner's Permit (CLP) for at least 14 days before taking the CDL skills test.
6. Pass Knowledge Tests: You must pass the CDL general knowledge test and the Doubles/Triples endorsement knowledge test.
7. Pass Skills Test: You must pass the CDL Doubles/Triples skills test, which includes a pre-trip inspection, basic vehicle control, and on-road driving test in a vehicle with Doubles/Triples attached.
Note that additional requirements may apply depending on your specific situation and the type of commercial vehicle you plan to operate with Doubles/Triples attached. It's important to review the Minnesota CDL Manual and consult with the Minnesota Department of Public Safety for more information on obtaining a CDL Doubles/Triples license.
Yes, to obtain a CDL Doubles/Triples endorsement, you must have specialized experience and training.
According to federal regulations, drivers must have a valid Commercial Driver's License (CDL) and pass a knowledge and skills test specific to double/triple trailers. Additionally, you must have at least 90 days of recent experience driving a commercial motor vehicle that is both equipped with a full air brake system and that is of the same vehicle group as the combination vehicle you plan to operate.
The Minnesota Department of Public Safety requires that you hold a valid Minnesota Class A CDL and pass the CDL Doubles/Triples skills test. You can prepare for the knowledge test by reviewing the Minnesota CDL manual and by taking practice tests.
It's important to note that as of February 7, 2022, new federal regulations will require drivers seeking a Doubles/Triples endorsement to complete a minimum of 15 hours of behind-the-wheel training in a commercial motor vehicle with double/triple trailers. The training must be provided by an FMCSA-approved training provider.
Therefore, it's recommended that you receive specialized training from an approved training provider before attempting to obtain your CDL Doubles/Triples endorsement. This will ensure that you have the necessary skills and knowledge to safely operate double/triple trailers on the road.
According to federal regulations, drivers must have a valid Commercial Driver's License (CDL) and pass a knowledge and skills test specific to double/triple trailers. Additionally, you must have at least 90 days of recent experience driving a commercial motor vehicle that is both equipped with a full air brake system and that is of the same vehicle group as the combination vehicle you plan to operate.
The Minnesota Department of Public Safety requires that you hold a valid Minnesota Class A CDL and pass the CDL Doubles/Triples skills test. You can prepare for the knowledge test by reviewing the Minnesota CDL manual and by taking practice tests.
It's important to note that as of February 7, 2022, new federal regulations will require drivers seeking a Doubles/Triples endorsement to complete a minimum of 15 hours of behind-the-wheel training in a commercial motor vehicle with double/triple trailers. The training must be provided by an FMCSA-approved training provider.
Therefore, it's recommended that you receive specialized training from an approved training provider before attempting to obtain your CDL Doubles/Triples endorsement. This will ensure that you have the necessary skills and knowledge to safely operate double/triple trailers on the road.
Yes, to obtain a CDL Doubles/Triples endorsement, you must pass additional written tests or exams in addition to the general knowledge test for a commercial driver's license (CDL). You will need to pass a Doubles/Triples endorsement knowledge test, which covers the following topics:
1. Inspection of Doubles/Triples: This section covers the proper inspection of double/triple trailers, including the coupling process, uncoupling process, and proper securement of cargo.
2. Driving Doubles/Triples: This section covers the safe operation of double/triple trailers on the road, including turning and backing up with doubles/triples attached.
3. Combination Vehicle Air Brakes: This section covers the proper operation and maintenance of air brakes on combination vehicles.
To pass the Doubles/Triples endorsement knowledge test, you must answer at least 80% of the questions correctly. You must also pass this test before you can take the CDL Doubles/Triples skills test.
It's important to study and prepare for the Doubles/Triples endorsement knowledge test in advance to ensure that you are fully prepared to pass it. You can find study materials and practice tests in the Minnesota CDL manual or through other resources provided by the Minnesota Department of Public Safety.
1. Inspection of Doubles/Triples: This section covers the proper inspection of double/triple trailers, including the coupling process, uncoupling process, and proper securement of cargo.
2. Driving Doubles/Triples: This section covers the safe operation of double/triple trailers on the road, including turning and backing up with doubles/triples attached.
3. Combination Vehicle Air Brakes: This section covers the proper operation and maintenance of air brakes on combination vehicles.
To pass the Doubles/Triples endorsement knowledge test, you must answer at least 80% of the questions correctly. You must also pass this test before you can take the CDL Doubles/Triples skills test.
It's important to study and prepare for the Doubles/Triples endorsement knowledge test in advance to ensure that you are fully prepared to pass it. You can find study materials and practice tests in the Minnesota CDL manual or through other resources provided by the Minnesota Department of Public Safety.
During the CDL Doubles/Triples endorsement skills test, you will need to demonstrate your ability to safely operate a double/triple combination vehicle. The skills test consists of three parts:
1. Pre-trip Inspection: You will need to conduct a pre-trip inspection of your vehicle and demonstrate your knowledge and ability to identify any potential safety hazards or equipment malfunctions.
2. Basic Vehicle Control: You will need to demonstrate your ability to safely maneuver your vehicle in tight spaces, such as backing up and turning around obstacles.
3. On-road Test: You will need to demonstrate your ability to safely operate your vehicle on the road, including making turns, lane changes, and maneuvering through traffic.
Specifically, during the on-road portion of the test, you will be evaluated on your ability to perform the following maneuvers:
1. Coupling and uncoupling double/triple trailers
2. Shifting gears
3. Lane changes
4. Making turns
5. Adjusting speed and maintaining a safe following distance
6. Managing space around your vehicle
7. Responding to traffic signals and signs
It's important that you are familiar with the operation of double/triple trailers and are comfortable driving them before attempting the CDL Doubles/Triples endorsement skills test. You can receive training from an FMCSA-approved training provider or from an experienced driver who is willing to provide guidance and instruction.
1. Pre-trip Inspection: You will need to conduct a pre-trip inspection of your vehicle and demonstrate your knowledge and ability to identify any potential safety hazards or equipment malfunctions.
2. Basic Vehicle Control: You will need to demonstrate your ability to safely maneuver your vehicle in tight spaces, such as backing up and turning around obstacles.
3. On-road Test: You will need to demonstrate your ability to safely operate your vehicle on the road, including making turns, lane changes, and maneuvering through traffic.
Specifically, during the on-road portion of the test, you will be evaluated on your ability to perform the following maneuvers:
1. Coupling and uncoupling double/triple trailers
2. Shifting gears
3. Lane changes
4. Making turns
5. Adjusting speed and maintaining a safe following distance
6. Managing space around your vehicle
7. Responding to traffic signals and signs
It's important that you are familiar with the operation of double/triple trailers and are comfortable driving them before attempting the CDL Doubles/Triples endorsement skills test. You can receive training from an FMCSA-approved training provider or from an experienced driver who is willing to provide guidance and instruction.
No, you cannot legally operate a double/triple trailer without a CDL Doubles/Triples endorsement on your commercial driver's license (CDL). In Minnesota, the Doubles/Triples endorsement is required for any driver who operates a double/triple trailer combination that exceeds 26,000 pounds.
You must pass both a knowledge test and a skills test in order to obtain the Doubles/Triples endorsement on your CDL. The knowledge test covers topics such as inspection of doubles/triples, driving doubles/triples, and combination vehicle air brakes. The skills test evaluates your ability to safely operate a double/triple trailer combination.
If you are caught operating a double/triple trailer without the required Doubles/Triples endorsement, you may face fines and other penalties. Additionally, your employer may be subject to fines or other penalties for allowing you to operate a double/triple trailer without the proper endorsement.
It's important to ensure that you have the necessary endorsements on your CDL before operating any commercial vehicle. If you are unsure of which endorsements you need for your specific job or vehicle, contact the Minnesota Department of Public Safety for guidance and information.
You must pass both a knowledge test and a skills test in order to obtain the Doubles/Triples endorsement on your CDL. The knowledge test covers topics such as inspection of doubles/triples, driving doubles/triples, and combination vehicle air brakes. The skills test evaluates your ability to safely operate a double/triple trailer combination.
If you are caught operating a double/triple trailer without the required Doubles/Triples endorsement, you may face fines and other penalties. Additionally, your employer may be subject to fines or other penalties for allowing you to operate a double/triple trailer without the proper endorsement.
It's important to ensure that you have the necessary endorsements on your CDL before operating any commercial vehicle. If you are unsure of which endorsements you need for your specific job or vehicle, contact the Minnesota Department of Public Safety for guidance and information.
You can add the CDL Doubles/Triples endorsement to your existing CDL license by passing the required knowledge and skills tests and paying the necessary fees. You do not need to apply for a new license.
To add the Doubles/Triples endorsement to your CDL, you will need to visit a Minnesota Department of Public Safety Driver and Vehicle Services (DVS) exam station. You will need to bring your current CDL, proof of identity, proof of residence, and payment for the endorsement fee.
You will be required to pass a knowledge test that covers topics such as inspection of doubles/triples, driving doubles/triples, and combination vehicle air brakes. After passing the knowledge test, you will need to pass a skills test that evaluates your ability to safely operate a double/triple trailer combination.
Once you have successfully passed both tests and paid the fee, the Doubles/Triples endorsement will be added to your CDL license. You will receive a new license that shows the endorsement.
It's important to note that you must already hold a valid CDL before you can add any endorsements. If your CDL has expired or has been disqualified, you will need to renew or reinstate your CDL before adding any endorsements.
To add the Doubles/Triples endorsement to your CDL, you will need to visit a Minnesota Department of Public Safety Driver and Vehicle Services (DVS) exam station. You will need to bring your current CDL, proof of identity, proof of residence, and payment for the endorsement fee.
You will be required to pass a knowledge test that covers topics such as inspection of doubles/triples, driving doubles/triples, and combination vehicle air brakes. After passing the knowledge test, you will need to pass a skills test that evaluates your ability to safely operate a double/triple trailer combination.
Once you have successfully passed both tests and paid the fee, the Doubles/Triples endorsement will be added to your CDL license. You will receive a new license that shows the endorsement.
It's important to note that you must already hold a valid CDL before you can add any endorsements. If your CDL has expired or has been disqualified, you will need to renew or reinstate your CDL before adding any endorsements.
Yes, there are restrictions and limitations that apply to drivers with a CDL Doubles/Triples endorsement. The Federal Motor Carrier Safety Administration (FMCSA) has established specific rules and regulations for operating double/triple trailer combinations, and drivers with the Doubles/Triples endorsement must follow these rules.
Here are some of the restrictions and limitations that apply to drivers with a CDL Doubles/Triples endorsement:
1. Vehicle weight: Double/triple trailer combinations cannot exceed a total gross weight of 80,000 pounds.
2. Length limitations: Double/triple trailer combinations are limited to a maximum length of 28 feet for each trailer.
3. Turning radius: Double/triple trailer combinations require more space for turning than single vehicles, so drivers must be aware of their vehicle's turning radius and maneuver accordingly.
4. Braking systems: Double/triple trailer combinations require special braking systems that allow the driver to control all trailers with one brake system.
5. Speed limits: Some states have lower speed limits for double/triple trailer combinations than for single vehicles, so drivers must be aware of these limits and comply with them.
6. Special driving skills: Operating double/triple trailer combinations requires special driving skills, including maneuvering in tight spaces, backing up, and maintaining control in adverse weather conditions or emergency situations.
It's important for drivers with the Doubles/Triples endorsement to be familiar with all applicable rules and regulations, as well as any state-specific laws or restrictions that may apply. Drivers should also receive proper training and practice before operating a double/triple trailer combination on public roads.
Here are some of the restrictions and limitations that apply to drivers with a CDL Doubles/Triples endorsement:
1. Vehicle weight: Double/triple trailer combinations cannot exceed a total gross weight of 80,000 pounds.
2. Length limitations: Double/triple trailer combinations are limited to a maximum length of 28 feet for each trailer.
3. Turning radius: Double/triple trailer combinations require more space for turning than single vehicles, so drivers must be aware of their vehicle's turning radius and maneuver accordingly.
4. Braking systems: Double/triple trailer combinations require special braking systems that allow the driver to control all trailers with one brake system.
5. Speed limits: Some states have lower speed limits for double/triple trailer combinations than for single vehicles, so drivers must be aware of these limits and comply with them.
6. Special driving skills: Operating double/triple trailer combinations requires special driving skills, including maneuvering in tight spaces, backing up, and maintaining control in adverse weather conditions or emergency situations.
It's important for drivers with the Doubles/Triples endorsement to be familiar with all applicable rules and regulations, as well as any state-specific laws or restrictions that may apply. Drivers should also receive proper training and practice before operating a double/triple trailer combination on public roads.
The maximum weight and length limits for double/triple trailers with a CDL Doubles/Triples endorsement are regulated by the Federal Motor Carrier Safety Administration (FMCSA). The limits are as follows:
1. Maximum weight limit: Double/triple trailer combinations cannot exceed a total gross weight of 80,000 pounds.
2. Maximum length limit: Double/triple trailer combinations are limited to a maximum length of 28 feet for each trailer. The overall maximum length of the truck and two trailers cannot exceed 80 feet.
It's important to note that some states may have additional weight and length restrictions for double/triple trailer combinations, and drivers with a Doubles/Triples endorsement must comply with these restrictions as well. Drivers should also be aware of any special driving skills required to operate double/triple trailer combinations, such as maneuvering in tight spaces, backing up, and maintaining control in adverse weather conditions or emergency situations.
1. Maximum weight limit: Double/triple trailer combinations cannot exceed a total gross weight of 80,000 pounds.
2. Maximum length limit: Double/triple trailer combinations are limited to a maximum length of 28 feet for each trailer. The overall maximum length of the truck and two trailers cannot exceed 80 feet.
It's important to note that some states may have additional weight and length restrictions for double/triple trailer combinations, and drivers with a Doubles/Triples endorsement must comply with these restrictions as well. Drivers should also be aware of any special driving skills required to operate double/triple trailer combinations, such as maneuvering in tight spaces, backing up, and maintaining control in adverse weather conditions or emergency situations.
Yes, there are specific safety considerations and regulations that apply to driving double/triple trailers with a CDL Doubles/Triples endorsement. Here are some of the most important ones:
1. Special driving skills: Driving a double/triple trailer combination requires special driving skills and techniques. These include maintaining a safe following distance, anticipating turns and lane changes, and being aware of the vehicle's turning radius.
2. Special braking systems: Double/triple trailer combinations require special braking systems that allow the driver to control all trailers with one brake system. Drivers should ensure that their brakes are in good working order and that they are familiar with the operation of the braking system.
3. Weight distribution: Proper weight distribution is essential for safe handling of double/triple trailer combinations. Drivers should ensure that the weight is evenly distributed between all trailers, and that the weight is within legal limits.
4. Speed limits: Some states have lower speed limits for double/triple trailer combinations than for single vehicles. Drivers should be aware of these limits and comply with them.
5. Adverse weather conditions: Driving a double/triple trailer combination in adverse weather conditions requires extra caution and skill. Drivers should be prepared to adjust their driving techniques and reduce their speed as necessary.
6. Pre-trip inspections: Before operating a double/triple trailer combination, drivers should perform a thorough pre-trip inspection to ensure that all equipment is in good working order.
It's important for drivers with a Doubles/Triples endorsement to be familiar with all applicable rules and regulations, as well as any state-specific laws or restrictions that may apply. They should also receive proper training and practice before operating a double/triple trailer combination on public roads.
1. Special driving skills: Driving a double/triple trailer combination requires special driving skills and techniques. These include maintaining a safe following distance, anticipating turns and lane changes, and being aware of the vehicle's turning radius.
2. Special braking systems: Double/triple trailer combinations require special braking systems that allow the driver to control all trailers with one brake system. Drivers should ensure that their brakes are in good working order and that they are familiar with the operation of the braking system.
3. Weight distribution: Proper weight distribution is essential for safe handling of double/triple trailer combinations. Drivers should ensure that the weight is evenly distributed between all trailers, and that the weight is within legal limits.
4. Speed limits: Some states have lower speed limits for double/triple trailer combinations than for single vehicles. Drivers should be aware of these limits and comply with them.
5. Adverse weather conditions: Driving a double/triple trailer combination in adverse weather conditions requires extra caution and skill. Drivers should be prepared to adjust their driving techniques and reduce their speed as necessary.
6. Pre-trip inspections: Before operating a double/triple trailer combination, drivers should perform a thorough pre-trip inspection to ensure that all equipment is in good working order.
It's important for drivers with a Doubles/Triples endorsement to be familiar with all applicable rules and regulations, as well as any state-specific laws or restrictions that may apply. They should also receive proper training and practice before operating a double/triple trailer combination on public roads.
