# 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..

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

### 1. To check the automatic transmission fluid level in some vehicles, the vehicle:

Explanation
For some vehicles, you may need to leave the engine running to be able to check its automatic transmission fluid level.

### 2. When using a turn signal, you should not:

Explanation
Always signal well ahead of a turn or lane change. Signal continuously until you have completed the turn or lane change, then be sure to cancel the signal so you do not confuse other drivers.

### 3. Hydroplaning usually occurs:

Explanation
In places where water collects on the road, it is possible for a vehicle to hydroplane. Low tire pressure or worn tire tread makes this more likely to happen. If there is enough water on a road surface, hydroplaning can occur at speeds as low as 30 mph.

### 4. What is the only way to sober up after drinking?

Explanation
The liver removes alcohol from the body at a fixed rate that cannot be increased through tricks like drinking coffee or taking a cold shower. The only way to sober up after drinking is to wait for the alcohol to be removed from your system.

### 5. Check ____ to ensure that the air in your vehicle's air braking system flows to all tires.

Explanation
Check the air brakes on a double or triple combination during your normal pre-trip inspection. After air pressure has reached a normal level, push in the red trailer air supply knob to send air to the emergency lines. Use the trailer hand brake to send air to the service line, then open the rear shut-off valve. If air is escaping through the valve, you will know that the entire system is charged.

### 6. If a truck's Anti-Lock Braking System (ABS) is not working:

Explanation
If an ABS system fails, the vehicle will still have normal braking function. The driver should continue to drive and brake as they normally would.

### 7. Before a vehicle with dual air brakes is driven, pressure of at least ____ should be built up in both braking systems.

Explanation
Before driving a vehicle with a dual air brake system, allow time for the air compressor to build up pressure of at least 100 psi in both the primary and secondary systems.

## Frequently Asked Questions

To obtain a CDL Doubles/Triples endorsement in Indiana, you need to follow these steps:

1. Obtain a valid Indiana CDL: You must have a valid Indiana Commercial Driver's License before you can apply for any endorsements.

2. Study the Indiana CDL Driver's Manual: You should study the Doubles/Triples section of the Indiana CDL Driver's Manual to prepare for the knowledge test.

3. Schedule and Pass the Knowledge Test: Contact your local BMV office and schedule an appointment to take the Doubles/Triples endorsement knowledge test. Once you pass the test, you will have to pay a fee for the endorsement.

4. Complete a skills test: After passing the knowledge test, you must complete a skills test that includes a pre-trip inspection and an on-road driving test in a vehicle that has double or triple trailers.

5. Submit required documents: You must submit proof of identity, residency, and social security number at the time of application.

6. Pay required fees: There is an additional fee to add a Doubles/Triples endorsement to your CDL.

7. Receive your endorsement: Once you have completed all of the requirements and passed all necessary tests, you will receive your CDL with Doubles/Triples endorsement from the Indiana BMV.
To get a CDL Doubles/Triples license in Indiana, you need to meet the following requirements:

1. Age requirement: You must be at least 21 years old to apply for a CDL Doubles/Triples license.

2. Valid Indiana CDL: You must hold a valid Indiana Commercial Driver's License (CDL) before you can apply for the Doubles/Triples endorsement.

3. Medical Certification: You must pass a medical examination and obtain a Medical Examiner's Certificate.

4. Clean driving record: You must have a clean driving record and not have any serious traffic violations in the past.

5. Knowledge Test: You must pass a knowledge test that covers the rules and regulations of driving with double or triple trailers.

6. Skills Test: You must pass a skills test that includes an on-road driving test in a vehicle with double or triple trailers.

7. Required Documents: You must submit proof of identity, residency, and Social Security number at the time of application.

8. Fees: You will need to pay an additional fee for the Doubles/Triples endorsement on your CDL.

It is important to note that there may be additional requirements depending on your specific situation, such as background checks or additional training requirements. It is recommended to check with your local BMV office for any additional requirements.
Yes, you do need specific training and experience to obtain a CDL Doubles/Triples endorsement in Indiana.

According to the Indiana Bureau of Motor Vehicles (BMV), you must have at least 90 days of experience driving a commercial motor vehicle with a Class A CDL before you can apply for the Doubles/Triples endorsement.

Additionally, before taking the skills test for the Doubles/Triples endorsement, you must complete training that includes both classroom instruction and behind-the-wheel experience. The training must cover the following topics:

1. Inspecting double/triple trailers for safety
2. Coupling and uncoupling double/triple trailers
3. Driving double/triple trailers
4. Backing up double/triple trailers

The training must be completed at a school or training facility that is approved by the Indiana BMV. After completing the training, you will receive a certificate of completion that you will need to present when you take the skills test for the Doubles/Triples endorsement.

It is important to note that additional training or experience may be required depending on your specific situation or employer's requirements. It is recommended to check with your local BMV office or employer for any additional requirements.
Yes, there is an additional written test that you must pass to obtain a CDL Doubles/Triples endorsement in Indiana.

The written test will cover the following topics:

1. Inspecting double/triple trailers for safety
2. Coupling and uncoupling double/triple trailers
3. Driving double/triple trailers
4. Backing up double/triple trailers

The test will have multiple-choice questions and you must score at least 80% to pass. The Indiana BMV provides a CDL study guide that includes information on the Doubles/Triples endorsement, as well as practice questions to help you prepare for the test.

It is important to note that in addition to the written test, you must also pass a skills test that includes an on-road driving test in a vehicle with double or triple trailers. You must also have at least 90 days of experience driving a commercial motor vehicle with a Class A CDL before you can apply for the Doubles/Triples endorsement.

It is recommended to study the CDL study guide and practice questions thoroughly before taking the written test and to ensure that you have completed the required training and have enough experience before taking the skills test.
To obtain a CDL Doubles/Triples endorsement in Indiana, you must pass a skills test that includes specific maneuvers and skills related to driving double or triple trailers.

The skills test will include the following maneuvers:

1. Pre-trip inspection: You must inspect the double or triple trailers and identify any safety hazards or defects before beginning the driving portion of the test.

2. Coupling and uncoupling: You must demonstrate proper techniques for coupling and uncoupling double or triple trailers.

3. Straight line backing: You must back the vehicle in a straight line for a distance of at least 100 feet.

4. Alley dock backing: You must back the vehicle into a space that is 40 feet long and 8 feet wide, with a 90-degree turn.

5. Offset backing: You must back the vehicle into a space that is 40 feet long and 8 feet wide, with a 45-degree turn.

6. Serpentine backing: You must back the vehicle through a series of cones in a serpentine pattern without touching any cones.

7. On-road driving: You must drive the vehicle with double or triple trailers on public roads while demonstrating safe driving techniques, including proper shifting, turning, braking, and acceleration.

It is important to note that you must provide your own vehicle for the skills test, which must meet certain specifications outlined by the Indiana BMV. Additionally, you must complete the required training and have at least 90 days of experience driving a commercial motor vehicle with a Class A CDL before you can apply for the Doubles/Triples endorsement.

It is recommended to practice these maneuvers thoroughly before taking the skills test and to ensure that your vehicle meets all required specifications.
No, you cannot operate double or triple trailers without a CDL Doubles/Triples endorsement. In Indiana, a CDL Doubles/Triples endorsement is required for anyone who operates a commercial motor vehicle with double or triple trailers.

According to the Indiana BMV, a double trailer is defined as "two trailers connected to each other by a converter dolly or fifth wheel assembly," while a triple trailer is defined as "three trailers connected to each other by a converter dolly or fifth wheel assembly."

To obtain the Doubles/Triples endorsement, you must pass a written test and a skills test that demonstrates your ability to safely operate double or triple trailers. You must also have at least 90 days of experience driving a commercial motor vehicle with a Class A CDL before you can apply for the endorsement.

It is important to note that operating a commercial motor vehicle without the proper endorsement can result in fines, penalties, and even the suspension or revocation of your CDL license. Therefore, it is essential to obtain the necessary endorsements and maintain compliance with all applicable regulations.
In Indiana, you can add the CDL Doubles/Triples endorsement to your existing CDL license by passing the required written and skills tests. You do not need to apply for a new license.

To add the endorsement, you must first study for and pass the written test. Once you have passed the written test, you can schedule a skills test at an approved testing location. During the skills test, you will be required to demonstrate your ability to safely operate double or triple trailers.

If you pass both tests, the Indiana BMV will add the Doubles/Triples endorsement to your existing CDL license. You will also need to pay a fee for the endorsement.

It is important to note that you must have at least 90 days of experience driving a commercial motor vehicle with a Class A CDL before you can apply for the Doubles/Triples endorsement.

If you do not currently hold a CDL license, you will need to apply for one and pass all required tests, including the Doubles/Triples endorsement tests, before you can legally operate double or triple trailers in Indiana.
Yes, there are restrictions and limitations for drivers with a CDL Doubles/Triples endorsement in Indiana.

Firstly, drivers with a Doubles/Triples endorsement are not allowed to operate triple trailers in Indiana. This means that you can only operate double trailers with this endorsement.

Secondly, drivers with a Doubles/Triples endorsement must also comply with all other applicable regulations and restrictions, such as weight limits, hours of service, and hazardous materials transportation.

Additionally, it is important to note that driving double trailers requires additional skill and attention compared to single trailers. Therefore, it is important for drivers to receive proper training and practice before operating double trailers on the road.

Finally, it is important for drivers with a Doubles/Triples endorsement to maintain a safe driving record and comply with all regulations. Violations of any traffic laws or regulations can result in fines, license suspension or revocation, or other penalties.
Yes, there are specific safety considerations and regulations for driving double/triple trailers with a CDL Doubles/Triples endorsement in Indiana.

Here are some important regulations and safety considerations to keep in mind:

1. Weight limits: The maximum weight for a double trailer combination is 80,000 pounds, and the maximum weight for a triple trailer combination is 100,000 pounds. It is important to ensure that the weight of the cargo you are carrying does not exceed these limits.

2. Length limits: The maximum length for a double trailer combination is 28 feet for each trailer, or a total length of 57 feet. The maximum length for a triple trailer combination is 28 feet for each trailer, or a total length of 81 feet. It is important to ensure that your vehicle does not exceed these length limits.

3. Braking requirements: Double and triple trailers require additional braking power to stop the vehicle safely. The braking system must be designed and maintained to meet federal regulations.

4. Turning considerations: Double and triple trailers require more space to turn than single trailers, so it is important to be aware of your surroundings and use caution when turning.

5. Driver training: Drivers operating double/triple trailers must receive specialized training in order to obtain their CDL Doubles/Triples endorsement. It is important to maintain your skills through ongoing training and practice.

6. Safety inspections: Double/triple trailers must be inspected regularly to ensure that they are safe to operate on the road.

7. Hours of service: Drivers operating double/triple trailers must comply with federal Hours of Service regulations, which limit the number of hours drivers can operate their vehicle each day and week.

By following these regulations and safety considerations, drivers with a CDL Doubles/Triples endorsement can help ensure that they are operating their vehicles safely on the road.