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 four possible answer choices. Test questions come from the Indiana 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. When uncoupling a dolly, you should:
Explanation
Never unlock the pintle hook with the dolly still under the rear trailer. This could cause the dolly tow bar to fly up, possibly causing serious injury.
9. A driver should always:
Explanation
While driving, you should continually scan the road to spot potential hazards in advance. Make emergency plans for how to deal with the hazards if they become dangerous.
10. When backing, it is best to:
Explanation
If you must drive in reverse, you should back up slowly and use the mirrors on both sides of your vehicle. Use a helper to monitor your blind spots whenever possible. You and the helper should agree on a signal for "stop."
11. Which of the following is not a problem?
Explanation
When inspecting an exhaust system, you should verify that parts of the system are not loose, broken, or missing. The system's parts must be properly mounted and should not be rubbing against moving parts of the vehicle.
12. During an applied leakage test, the maximum leakage rate for a triple combination vehicle is:
Explanation
It is important to know the maximum air loss rate that is safe for your specific vehicle. A triple combination should have a leakage rate no higher than 6 psi in a minute during an applied leakage test.
13. What is another name for the service line?
Explanation
The service line, also called the control line or signal line, carries air to the trailer brakes and is controlled by the foot brake or trailer hand brake.
14. When doing an inspection, make sure your brake pads are:
Explanation
Potential problems to check for when inspecting brakes include cracked drums; shoes or pads with oil, grease, or brake fluid on them; and shoes that are missing, broken, or worn dangerously thin.
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Frequently Asked Questions
Here are the steps to obtain a CDL Doubles/Triples endorsement in Indiana:
1. Meet the eligibility requirements: You must be at least 18 years old and hold a valid Indiana driver's license. You must also have a valid Medical Examiner's Certificate and pass a vision test.
2. Obtain a CDL: To obtain a CDL, you need to pass a written knowledge test, an on-road skills test, and a pre-trip inspection test. You will also need to provide proof of identity, residency, and legal presence in the United States.
3. Study for the Doubles/Triples endorsement: You can study for the Doubles/Triples endorsement by reviewing the Indiana CDL Driver's Manual or by taking a commercial driver training course.
4. Pass the Doubles/Triples endorsement written test: The written test consists of 20 multiple-choice questions related to safety procedures and regulations for driving with multiple trailers. You must score at least 80% to pass.
5. Pay the endorsement fee: The fee for the Doubles/Triples endorsement is $2.50 per year, with a minimum of $5 for a two-year endorsement.
6. Schedule a skills test (optional): If you want to add the Doubles/Triples endorsement to your CDL license, you will need to pass a skills test that includes coupling and uncoupling procedures, straight line backing, and on-road driving with multiple trailers.
7. Receive your new CDL: Once you have passed all required tests and paid the endorsement fee, you will receive an updated CDL with the Doubles/Triples endorsement added to it.
1. Meet the eligibility requirements: You must be at least 18 years old and hold a valid Indiana driver's license. You must also have a valid Medical Examiner's Certificate and pass a vision test.
2. Obtain a CDL: To obtain a CDL, you need to pass a written knowledge test, an on-road skills test, and a pre-trip inspection test. You will also need to provide proof of identity, residency, and legal presence in the United States.
3. Study for the Doubles/Triples endorsement: You can study for the Doubles/Triples endorsement by reviewing the Indiana CDL Driver's Manual or by taking a commercial driver training course.
4. Pass the Doubles/Triples endorsement written test: The written test consists of 20 multiple-choice questions related to safety procedures and regulations for driving with multiple trailers. You must score at least 80% to pass.
5. Pay the endorsement fee: The fee for the Doubles/Triples endorsement is $2.50 per year, with a minimum of $5 for a two-year endorsement.
6. Schedule a skills test (optional): If you want to add the Doubles/Triples endorsement to your CDL license, you will need to pass a skills test that includes coupling and uncoupling procedures, straight line backing, and on-road driving with multiple trailers.
7. Receive your new CDL: Once you have passed all required tests and paid the endorsement fee, you will receive an updated CDL with the Doubles/Triples endorsement added to it.
To get a CDL (Commercial Driver's License) Doubles/Triples license in Indiana, you must meet the following requirements:
1. Have a valid Indiana driver's license.
2. Be at least 18 years old.
3. Pass a vision test.
4. Have a valid Medical Examiner's Certificate.
5. Possess a valid CDL with the proper class for the vehicle you will be driving.
6. Pass the written test for the Doubles/Triples endorsement, which consists of 20 multiple-choice questions related to safety procedures and regulations for driving with multiple trailers.
7. Pay the endorsement fee of $2.50 per year, with a minimum of $5 for a two-year endorsement.
If you want to add the Doubles/Triples endorsement to your CDL license, you will also need to pass a skills test that includes coupling and uncoupling procedures, straight line backing, and on-road driving with multiple trailers.
It's essential to note that if you are under 21 years old, you can only drive within Indiana and cannot operate a commercial vehicle carrying hazardous materials or passengers across state lines. Also, if you are 21 years old or older, you can drive across state lines but cannot transport hazardous materials unless you obtain an additional Hazardous Materials (Hazmat) endorsement on your CDL license.
1. Have a valid Indiana driver's license.
2. Be at least 18 years old.
3. Pass a vision test.
4. Have a valid Medical Examiner's Certificate.
5. Possess a valid CDL with the proper class for the vehicle you will be driving.
6. Pass the written test for the Doubles/Triples endorsement, which consists of 20 multiple-choice questions related to safety procedures and regulations for driving with multiple trailers.
7. Pay the endorsement fee of $2.50 per year, with a minimum of $5 for a two-year endorsement.
If you want to add the Doubles/Triples endorsement to your CDL license, you will also need to pass a skills test that includes coupling and uncoupling procedures, straight line backing, and on-road driving with multiple trailers.
It's essential to note that if you are under 21 years old, you can only drive within Indiana and cannot operate a commercial vehicle carrying hazardous materials or passengers across state lines. Also, if you are 21 years old or older, you can drive across state lines but cannot transport hazardous materials unless you obtain an additional Hazardous Materials (Hazmat) endorsement on your CDL license.
Indiana does not require any specific experience or training to obtain a CDL Doubles/Triples endorsement. Still, it is highly recommended that you receive specialized training for driving vehicles with multiple trailers.
You can receive training through a CDL training school, community college, or vocational school. These programs provide hands-on training in driving with multiple trailers and coupling and uncoupling procedures.
The Federal Motor Carrier Safety Administration (FMCSA) also offers a free online training course called "Double/Triple Trailers" that provides information on safety procedures and regulations for driving with multiple trailers.
It is essential to note that some employers may require specialized training or experience before hiring you to drive vehicles with multiple trailers. Therefore, it's recommended to check with potential employers for their specific requirements before pursuing a Doubles/Triples endorsement.
You can receive training through a CDL training school, community college, or vocational school. These programs provide hands-on training in driving with multiple trailers and coupling and uncoupling procedures.
The Federal Motor Carrier Safety Administration (FMCSA) also offers a free online training course called "Double/Triple Trailers" that provides information on safety procedures and regulations for driving with multiple trailers.
It is essential to note that some employers may require specialized training or experience before hiring you to drive vehicles with multiple trailers. Therefore, it's recommended to check with potential employers for their specific requirements before pursuing a Doubles/Triples endorsement.
Yes, to obtain a CDL Doubles/Triples endorsement in Indiana, you must pass a written test that covers topics specific to driving with multiple trailers.
The written test consists of 20 multiple-choice questions, and you must answer at least 16 questions correctly to pass. The test covers topics such as:
1. Safety procedures for driving with multiple trailers
2. Coupling and uncoupling procedures
3. Inspection and maintenance of multiple trailers
4. Weight distribution and cargo securement for multiple trailers
5. Special regulations and restrictions for driving with multiple trailers
You can study for the written test by using the Indiana Commercial Driver's License Manual, which is available online or at your local Bureau of Motor Vehicles (BMV) office. It's also recommended that you take practice tests to help you prepare for the actual exam.
It's important to note that passing the written test alone is not enough to obtain a Doubles/Triples endorsement. You must also pass a skills test that includes coupling and uncoupling procedures, straight line backing, and on-road driving with multiple trailers.
The written test consists of 20 multiple-choice questions, and you must answer at least 16 questions correctly to pass. The test covers topics such as:
1. Safety procedures for driving with multiple trailers
2. Coupling and uncoupling procedures
3. Inspection and maintenance of multiple trailers
4. Weight distribution and cargo securement for multiple trailers
5. Special regulations and restrictions for driving with multiple trailers
You can study for the written test by using the Indiana Commercial Driver's License Manual, which is available online or at your local Bureau of Motor Vehicles (BMV) office. It's also recommended that you take practice tests to help you prepare for the actual exam.
It's important to note that passing the written test alone is not enough to obtain a Doubles/Triples endorsement. You must also pass a skills test that includes coupling and uncoupling procedures, straight line backing, and on-road driving with multiple trailers.
To obtain a CDL Doubles/Triples endorsement in Indiana, you must pass a skills test that includes the following maneuvers:
1. Vehicle inspection: You will be required to perform a pre-trip inspection of your vehicle and trailer(s) and explain to the examiner what you are checking for.
2. Coupling and uncoupling: You will be required to properly couple and uncouple your vehicle and trailer(s), including connecting and disconnecting air lines, electrical cables, and safety chains.
3. Straight line backing: You will be required to back up your vehicle and trailer(s) in a straight line for a distance of approximately 100 feet.
4. Offset backing: You will be required to back up your vehicle and trailer(s) through a marked course that simulates an offset parking situation.
5. Parallel parking: You will be required to parallel park your vehicle and trailer(s) in a marked space that is 65 feet long and 8 feet wide.
6. On-road driving: You will be required to drive your vehicle and trailer(s) on public roads while demonstrating safe driving techniques, such as maintaining proper speed, signaling turns, checking mirrors, and obeying traffic laws.
It's important to note that the skills test is conducted in a specific order, and if you fail any part of the test, you will need to retake the entire test. Therefore, it's crucial that you practice each maneuver extensively before taking the test to increase your chances of passing on the first attempt.
1. Vehicle inspection: You will be required to perform a pre-trip inspection of your vehicle and trailer(s) and explain to the examiner what you are checking for.
2. Coupling and uncoupling: You will be required to properly couple and uncouple your vehicle and trailer(s), including connecting and disconnecting air lines, electrical cables, and safety chains.
3. Straight line backing: You will be required to back up your vehicle and trailer(s) in a straight line for a distance of approximately 100 feet.
4. Offset backing: You will be required to back up your vehicle and trailer(s) through a marked course that simulates an offset parking situation.
5. Parallel parking: You will be required to parallel park your vehicle and trailer(s) in a marked space that is 65 feet long and 8 feet wide.
6. On-road driving: You will be required to drive your vehicle and trailer(s) on public roads while demonstrating safe driving techniques, such as maintaining proper speed, signaling turns, checking mirrors, and obeying traffic laws.
It's important to note that the skills test is conducted in a specific order, and if you fail any part of the test, you will need to retake the entire test. Therefore, it's crucial that you practice each maneuver extensively before taking the test to increase your chances of passing on the first attempt.
No, you cannot legally operate a commercial vehicle with double or triple trailers without a CDL Doubles/Triples endorsement in Indiana.
The Federal Motor Carrier Safety Administration (FMCSA) requires drivers of commercial motor vehicles (CMVs) with double or triple trailers to obtain the Doubles/Triples endorsement on their CDL. This endorsement is added to your existing CDL and shows that you have passed the required written and skills tests to safely operate CMVs with multiple trailers.
Operating a CMV with double or triple trailers without the proper endorsement can result in fines, license suspension, and even criminal charges in some cases. It's important to always ensure that you have the proper endorsements and qualifications before operating any commercial vehicle.
The Federal Motor Carrier Safety Administration (FMCSA) requires drivers of commercial motor vehicles (CMVs) with double or triple trailers to obtain the Doubles/Triples endorsement on their CDL. This endorsement is added to your existing CDL and shows that you have passed the required written and skills tests to safely operate CMVs with multiple trailers.
Operating a CMV with double or triple trailers without the proper endorsement can result in fines, license suspension, and even criminal charges in some cases. It's important to always ensure that you have the proper endorsements and qualifications before operating any commercial vehicle.
You can add the CDL Doubles/Triples endorsement to your existing CDL license in Indiana by passing the required written and skills tests.
To add the Doubles/Triples endorsement, you will need to visit a BMV office and provide the following documents:
1. Your current Indiana CDL license
2. Your Social Security card or other acceptable proof of identity
3. Proof of residency in Indiana
4. Payment for any applicable fees
Once you have provided the necessary documents and paid the fees, you will need to pass a written test that covers topics related to double and triple trailers, such as coupling and uncoupling procedures, weight distribution, and safety precautions. After passing the written test, you will need to pass a skills test that includes maneuvers specific to double and triple trailers, as I explained earlier.
Once you have passed both tests, your CDL license will be updated to include the Doubles/Triples endorsement. You will receive a new license with the updated endorsement and expiration date.
It's important to note that if your CDL license is due for renewal soon, it may be more efficient to wait until your renewal date and add the Doubles/Triples endorsement at that time.
To add the Doubles/Triples endorsement, you will need to visit a BMV office and provide the following documents:
1. Your current Indiana CDL license
2. Your Social Security card or other acceptable proof of identity
3. Proof of residency in Indiana
4. Payment for any applicable fees
Once you have provided the necessary documents and paid the fees, you will need to pass a written test that covers topics related to double and triple trailers, such as coupling and uncoupling procedures, weight distribution, and safety precautions. After passing the written test, you will need to pass a skills test that includes maneuvers specific to double and triple trailers, as I explained earlier.
Once you have passed both tests, your CDL license will be updated to include the Doubles/Triples endorsement. You will receive a new license with the updated endorsement and expiration date.
It's important to note that if your CDL license is due for renewal soon, it may be more efficient to wait until your renewal date and add the Doubles/Triples endorsement at that time.
Yes, there are some restrictions and limitations for drivers with a CDL Doubles/Triples endorsement in Indiana. These restrictions are in place to ensure the safety of both the driver and other motorists on the road.
Here are some of the most important restrictions to keep in mind:
1. Maximum number of trailers: Drivers with a Doubles/Triples endorsement are limited to operating a combination of two or three trailers, depending on the specific endorsement.
2. Weight limits: Drivers with a Doubles/Triples endorsement may be subject to different weight limits than those without this endorsement. It's important to be aware of these weight limits and ensure that your vehicle is within them.
3. Special routing: Some states may require drivers with a Doubles/Triples endorsement to follow specific routes that avoid certain roads or highways.
4. Additional training: Employers may require drivers with a Doubles/Triples endorsement to undergo additional training beyond what is required for a standard CDL license.
5. Endorsement renewal: The Doubles/Triples endorsement must be renewed every four years, along with your CDL license.
It's important to follow all of these restrictions and limitations to ensure that you are operating your vehicle safely and in compliance with Indiana laws and regulations.
Here are some of the most important restrictions to keep in mind:
1. Maximum number of trailers: Drivers with a Doubles/Triples endorsement are limited to operating a combination of two or three trailers, depending on the specific endorsement.
2. Weight limits: Drivers with a Doubles/Triples endorsement may be subject to different weight limits than those without this endorsement. It's important to be aware of these weight limits and ensure that your vehicle is within them.
3. Special routing: Some states may require drivers with a Doubles/Triples endorsement to follow specific routes that avoid certain roads or highways.
4. Additional training: Employers may require drivers with a Doubles/Triples endorsement to undergo additional training beyond what is required for a standard CDL license.
5. Endorsement renewal: The Doubles/Triples endorsement must be renewed every four years, along with your CDL license.
It's important to follow all of these restrictions and limitations to ensure that you are operating your vehicle safely and in compliance with Indiana laws and regulations.
In Indiana, the maximum weight and length limits for double/triple trailers vary depending on the specific endorsement you hold.
For the Double Trailer (TT) endorsement, the maximum weight of the combination of two trailers is 34,000 pounds per trailer, and the overall length of the combination cannot exceed 28 feet for each trailer. Therefore, the overall length of the combination cannot exceed 56 feet.
For the Triple Trailer (TTP) endorsement, the maximum weight of the combination of three trailers is 28,000 pounds per trailer, and the overall length of each trailer cannot exceed 28 feet. Therefore, the overall length of the combination cannot exceed 84 feet.
It's important to note that these weight and length limits are specific to Indiana and may vary in other states. As a driver with a CDL Doubles/Triples endorsement, it's important to be aware of these limits and follow them to ensure that you are operating your vehicle safely and in compliance with Indiana laws and regulations.
For the Double Trailer (TT) endorsement, the maximum weight of the combination of two trailers is 34,000 pounds per trailer, and the overall length of the combination cannot exceed 28 feet for each trailer. Therefore, the overall length of the combination cannot exceed 56 feet.
For the Triple Trailer (TTP) endorsement, the maximum weight of the combination of three trailers is 28,000 pounds per trailer, and the overall length of each trailer cannot exceed 28 feet. Therefore, the overall length of the combination cannot exceed 84 feet.
It's important to note that these weight and length limits are specific to Indiana and may vary in other states. As a driver with a CDL Doubles/Triples endorsement, it's important to be aware of these limits and follow them to ensure that you are operating your vehicle safely and in compliance with Indiana laws and regulations.
Yes, there are specific safety considerations and regulations for driving double/triple trailers with a CDL Doubles/Triples endorsement in Indiana. These regulations are in place to ensure that drivers with this endorsement operate their vehicles safely and responsibly on the road.
Here are some of the safety considerations and regulations you should be aware of as a driver with a CDL Doubles/Triples endorsement:
1. Increased stopping distance: Double/triple trailers require a longer stopping distance than single trailers. It's important to be aware of this increased stopping distance and adjust your driving accordingly.
2. Limited maneuverability: Double/triple trailers also have limited maneuverability, especially when making turns or backing up. It's important to be familiar with your vehicle's turning radius and take extra precautions when making turns.
3. Proper loading and weight distribution: It's important to properly load and distribute the weight on double/triple trailers to ensure that the vehicle is balanced and stable on the road.
4. Regular inspections: Double/triple trailers require regular inspections to ensure that they are in good working order. This includes checking the brakes, tires, suspension, lights, and other safety features.
5. Special endorsements and training: Drivers must have a CDL Doubles/Triples endorsement to operate double/triple trailers, and they may also need additional training beyond what is required for a standard CDL license.
6. Observe speed limits: Drivers should observe posted speed limits as exceeding the limit increases the risk of rollovers or jackknifing.
By following these safety considerations and regulations, drivers with a CDL Doubles/Triples endorsement can help ensure that they operate their vehicles safely on the road while complying with Indiana laws and regulations.
Here are some of the safety considerations and regulations you should be aware of as a driver with a CDL Doubles/Triples endorsement:
1. Increased stopping distance: Double/triple trailers require a longer stopping distance than single trailers. It's important to be aware of this increased stopping distance and adjust your driving accordingly.
2. Limited maneuverability: Double/triple trailers also have limited maneuverability, especially when making turns or backing up. It's important to be familiar with your vehicle's turning radius and take extra precautions when making turns.
3. Proper loading and weight distribution: It's important to properly load and distribute the weight on double/triple trailers to ensure that the vehicle is balanced and stable on the road.
4. Regular inspections: Double/triple trailers require regular inspections to ensure that they are in good working order. This includes checking the brakes, tires, suspension, lights, and other safety features.
5. Special endorsements and training: Drivers must have a CDL Doubles/Triples endorsement to operate double/triple trailers, and they may also need additional training beyond what is required for a standard CDL license.
6. Observe speed limits: Drivers should observe posted speed limits as exceeding the limit increases the risk of rollovers or jackknifing.
By following these safety considerations and regulations, drivers with a CDL Doubles/Triples endorsement can help ensure that they operate their vehicles safely on the road while complying with Indiana laws and regulations.
