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. Test questions come from the Illinois Commercial Driver’s License Study Guide. 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 the brake pedal is depressed, air brakes work:
Explanation
After the brake pedal is pushed down in a vehicle with air brakes, it takes a half-second or more for air to flow through the lines and make the brakes work. This contrasts with hydraulic brakes used in cars and light and medium trucks, which instantly begin working when the pedal is pushed.
9. If another driver is tailgating you, you should:
Explanation
If you are being tailgated, it is advisable to open up the space in front of your vehicle, making it easier for the tailgater to get around you. Speeding up may be counterproductive because the driver may continue to tailgate you at the higher speed, only increasing the danger.
10. If a parked trailer does not have spring brakes, you should keep the trailer from moving by:
Explanation
If a parked trailer does not have spring brakes, wheel chocks should be used to prevent it from moving. Air brakes can only hold a parked trailer for as long as there is air pressure remaining in the air tanks, so wheel chocks will ensure safety.
11. Which of the following can help you determine when to upshift?
Explanation
There are two indicators that determine when you need to shift into a higher gear. One indicator is the engine speed (rpm). You should read your vehicle's manual to learn its rpm range and shift up when you reach the top of that range. The other indicator is road speed (mph). You should learn which speeds each gear can accommodate, then keep an eye on the speedometer and shift up as needed.
12. Starting in which year were newly manufactured trailers required to have ABS?
Explanation
All trailers and converter dollies manufactured on or after March 1, 1998 must be equipped with Anti-Lock Braking Systems (ABS).
13. A modulating control valve can control the:
Explanation
A modulating control valve allows a driver to gradually apply spring brakes. In equipped vehicles, the valve is controlled by a lever located on the dashboard.
14. Before a drive, ensure that air flows to all trailers by:
Explanation
Before a trip, ensure that air in the air brake system reaches all trailers. Do this by waiting for air pressure to build, then sending air to both the emergency and service lines and opening the shut-off valves on the rear of the last trailer. If air escapes from the shut-off valves in the rear of the combination, the air is being supplied to the entire vehicle.
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Frequently Asked Questions
To obtain a CDL Doubles/Triples endorsement in Illinois, you will need to:
1. Hold a valid Illinois CDL: You must hold a valid Illinois CDL before applying for any endorsements.
2. Study the Illinois CDL study guide: Study the Illinois CDL study guide and pay special attention to the sections related to Doubles/Triples.
3. Schedule an appointment: Schedule an appointment at your local Secretary of State Driver Services facility.
4. Visit Driver Services Facility: Visit the Driver Services facility on your scheduled appointment date and provide the following documents:
- Illinois CDL
- Social Security card
- Proof of residency
- Medical certificate
5. Pass a written exam: Pass a written exam on Doubles/Triples. The exam will test your knowledge of safety regulations, coupling and uncoupling, and inspecting double/triple trailers.
6. Pay the required fee: Pay the required fee for the endorsement.
Once you have completed these steps, you will receive your CDL Doubles/Triples endorsement. It is important to note that you must renew your endorsement every 4 years by passing a written exam and paying the required fee.
1. Hold a valid Illinois CDL: You must hold a valid Illinois CDL before applying for any endorsements.
2. Study the Illinois CDL study guide: Study the Illinois CDL study guide and pay special attention to the sections related to Doubles/Triples.
3. Schedule an appointment: Schedule an appointment at your local Secretary of State Driver Services facility.
4. Visit Driver Services Facility: Visit the Driver Services facility on your scheduled appointment date and provide the following documents:
- Illinois CDL
- Social Security card
- Proof of residency
- Medical certificate
5. Pass a written exam: Pass a written exam on Doubles/Triples. The exam will test your knowledge of safety regulations, coupling and uncoupling, and inspecting double/triple trailers.
6. Pay the required fee: Pay the required fee for the endorsement.
Once you have completed these steps, you will receive your CDL Doubles/Triples endorsement. It is important to note that you must renew your endorsement every 4 years by passing a written exam and paying the required fee.
To obtain a CDL Doubles/Triples license in Illinois, you must meet the following requirements:
1. Be at least 21 years old: You must be at least 21 years old to operate a commercial vehicle across state lines or transport hazardous materials.
2. Hold a valid Illinois driver’s license: You must hold a valid Illinois driver’s license.
3. Obtain a CDL learner’s permit: You must obtain a CDL learner’s permit by passing a written exam and meeting the medical requirements.
4. Complete a CDL training program: You are not required to complete a CDL training program in Illinois, but it is highly recommended.
5. Pass the CDL skills test: You must pass the CDL skills test in a vehicle that is representative of the commercial vehicle you will be driving with Doubles/Triples.
6. Pass the Doubles/Triples endorsement written exam: You must pass the Doubles/Triples endorsement written exam after passing the CDL skills test.
7. Meet medical requirements: You must meet the medical requirements for commercial drivers, including having good vision and hearing, and not having any medical conditions that would interfere with your ability to safely operate a commercial vehicle.
8. Provide required documentation: You must provide all required documentation, including your Social Security card, proof of residency, and medical certificate.
By meeting these requirements and successfully obtaining a CDL Doubles/Triples license in Illinois, you will be able to legally operate commercial vehicles with double/triple trailers in the state.
1. Be at least 21 years old: You must be at least 21 years old to operate a commercial vehicle across state lines or transport hazardous materials.
2. Hold a valid Illinois driver’s license: You must hold a valid Illinois driver’s license.
3. Obtain a CDL learner’s permit: You must obtain a CDL learner’s permit by passing a written exam and meeting the medical requirements.
4. Complete a CDL training program: You are not required to complete a CDL training program in Illinois, but it is highly recommended.
5. Pass the CDL skills test: You must pass the CDL skills test in a vehicle that is representative of the commercial vehicle you will be driving with Doubles/Triples.
6. Pass the Doubles/Triples endorsement written exam: You must pass the Doubles/Triples endorsement written exam after passing the CDL skills test.
7. Meet medical requirements: You must meet the medical requirements for commercial drivers, including having good vision and hearing, and not having any medical conditions that would interfere with your ability to safely operate a commercial vehicle.
8. Provide required documentation: You must provide all required documentation, including your Social Security card, proof of residency, and medical certificate.
By meeting these requirements and successfully obtaining a CDL Doubles/Triples license in Illinois, you will be able to legally operate commercial vehicles with double/triple trailers in the state.
Yes, before you can obtain a CDL Doubles/Triples endorsement, you must have some form of experience or training with double/triple trailers. The Federal Motor Carrier Safety Administration (FMCSA) requires that you have a valid CDL before you can get a Doubles/Triples endorsement, and that you have experience driving a commercial vehicle with a single trailer before you can operate a vehicle with double/triple trailers.
In Illinois, there are no specific training requirements for obtaining a Doubles/Triples endorsement. However, it is highly recommended that you complete a training program or seek additional training from a qualified instructor before attempting to drive with double/triple trailers.
Additionally, it is important to note that some employers may require specific experience and training before hiring drivers to operate vehicles with double/triple trailers. Therefore, it is important to check with potential employers to determine their specific requirements.
In Illinois, there are no specific training requirements for obtaining a Doubles/Triples endorsement. However, it is highly recommended that you complete a training program or seek additional training from a qualified instructor before attempting to drive with double/triple trailers.
Additionally, it is important to note that some employers may require specific experience and training before hiring drivers to operate vehicles with double/triple trailers. Therefore, it is important to check with potential employers to determine their specific requirements.
Yes, you are required to pass an additional written test or exam to obtain a CDL Doubles/Triples endorsement in Illinois. The written test for the Doubles/Triples endorsement covers specific topics related to driving with double/triple trailers, such as:
1. Coupling and uncoupling multiple trailers
2. Inspecting double/triple trailers
3. Checking air brakes on double/triple trailers
4. Maneuvering double/triple trailers
5. Safety precautions specific to double/triple trailers
The Doubles/Triples endorsement written test is in addition to the other CDL written tests you must pass, such as the general knowledge test and any other endorsement tests you may need.
To prepare for the Doubles/Triples endorsement written test, you should study the Illinois Commercial Driver’s License Study Guide and any other materials recommended by your training program or instructor. It is important to take the time to thoroughly understand all of the topics covered on the exam to ensure that you are fully prepared and can pass it successfully.
1. Coupling and uncoupling multiple trailers
2. Inspecting double/triple trailers
3. Checking air brakes on double/triple trailers
4. Maneuvering double/triple trailers
5. Safety precautions specific to double/triple trailers
The Doubles/Triples endorsement written test is in addition to the other CDL written tests you must pass, such as the general knowledge test and any other endorsement tests you may need.
To prepare for the Doubles/Triples endorsement written test, you should study the Illinois Commercial Driver’s License Study Guide and any other materials recommended by your training program or instructor. It is important to take the time to thoroughly understand all of the topics covered on the exam to ensure that you are fully prepared and can pass it successfully.
In Illinois, you must pass a skills test to obtain a CDL Doubles/Triples endorsement. During the skills test, you will be required to demonstrate your ability to safely operate a commercial vehicle with double/triple trailers. Some of the specific skills and maneuvers you may be required to perform during the Doubles/Triples endorsement test include:
1. Pre-trip inspection - You will be asked to perform a pre-trip inspection of your double/triple trailers, including checking for any defects or problems.
2. Coupling and uncoupling - You will need to correctly couple and uncouple your double/triple trailers.
3. Straight line backing - You will need to safely back up your double/triple trailers in a straight line.
4. Off-set backing - You may be required to demonstrate your ability to off-set back your double/triple trailers into a designated space.
5. Parallel parking - You may also need to parallel park your double/triple trailers between two cones or markers.
6. Turning and lane changes - You will need to safely navigate turns and lane changes while driving with double/triple trailers.
The exact skills and maneuvers you will be required to perform during the Doubles/Triples endorsement test may vary depending on the specific testing location and examiner. It is important to practice all of these skills and maneuvers before taking the test, and to ensure that you are comfortable operating a commercial vehicle with double/triple trailers in different driving situations.
1. Pre-trip inspection - You will be asked to perform a pre-trip inspection of your double/triple trailers, including checking for any defects or problems.
2. Coupling and uncoupling - You will need to correctly couple and uncouple your double/triple trailers.
3. Straight line backing - You will need to safely back up your double/triple trailers in a straight line.
4. Off-set backing - You may be required to demonstrate your ability to off-set back your double/triple trailers into a designated space.
5. Parallel parking - You may also need to parallel park your double/triple trailers between two cones or markers.
6. Turning and lane changes - You will need to safely navigate turns and lane changes while driving with double/triple trailers.
The exact skills and maneuvers you will be required to perform during the Doubles/Triples endorsement test may vary depending on the specific testing location and examiner. It is important to practice all of these skills and maneuvers before taking the test, and to ensure that you are comfortable operating a commercial vehicle with double/triple trailers in different driving situations.
No, in Illinois, you are required to have a CDL Doubles/Triples endorsement to operate a commercial vehicle with double/triple trailers. If you are found operating a commercial vehicle with double/triple trailers without the proper endorsement, you could face fines and penalties.
It is important to note that different states may have different requirements for CDL Doubles/Triples endorsements, so it is important to check the specific laws and regulations in your state. In general, however, if you plan to operate a commercial vehicle with double/triple trailers, you will need to obtain the appropriate endorsement on your CDL license.
To obtain a CDL Doubles/Triples endorsement in Illinois, you will need to pass a written test that covers specific topics related to driving with double/triple trailers and a skills test that demonstrates your ability to safely operate a commercial vehicle with double/triple trailers. It is important to take the time to study and prepare for these tests so that you can pass them successfully and obtain the necessary endorsement on your CDL license.
It is important to note that different states may have different requirements for CDL Doubles/Triples endorsements, so it is important to check the specific laws and regulations in your state. In general, however, if you plan to operate a commercial vehicle with double/triple trailers, you will need to obtain the appropriate endorsement on your CDL license.
To obtain a CDL Doubles/Triples endorsement in Illinois, you will need to pass a written test that covers specific topics related to driving with double/triple trailers and a skills test that demonstrates your ability to safely operate a commercial vehicle with double/triple trailers. It is important to take the time to study and prepare for these tests so that you can pass them successfully and obtain the necessary endorsement on your CDL license.
In Illinois, you can add the CDL Doubles/Triples endorsement to your existing CDL license. To add the endorsement, you will need to pass a written test that covers specific topics related to driving with double/triple trailers and a skills test that demonstrates your ability to safely operate a commercial vehicle with double/triple trailers.
To add the endorsement to your CDL license, you will need to visit a Secretary of State Driver Services facility and provide the necessary documentation, including your current CDL license, proof of identity and residency, and any other required forms or fees. Once you have passed the required tests and provided all necessary documentation, your CDL license will be updated to include the Doubles/Triples endorsement.
It is important to note that if you have any restrictions on your current CDL license, such as a restriction for automatic transmission only, you will need to have those restrictions removed before you can add the Doubles/Triples endorsement. You may also need to meet other requirements, such as having a certain amount of driving experience or completing specific training programs.
Overall, adding the CDL Doubles/Triples endorsement to your existing CDL license is typically a straightforward process as long as you meet all of the necessary requirements and provide all required documentation.
To add the endorsement to your CDL license, you will need to visit a Secretary of State Driver Services facility and provide the necessary documentation, including your current CDL license, proof of identity and residency, and any other required forms or fees. Once you have passed the required tests and provided all necessary documentation, your CDL license will be updated to include the Doubles/Triples endorsement.
It is important to note that if you have any restrictions on your current CDL license, such as a restriction for automatic transmission only, you will need to have those restrictions removed before you can add the Doubles/Triples endorsement. You may also need to meet other requirements, such as having a certain amount of driving experience or completing specific training programs.
Overall, adding the CDL Doubles/Triples endorsement to your existing CDL license is typically a straightforward process as long as you meet all of the necessary requirements and provide all required documentation.
Yes, there are some restrictions and limitations for drivers with a CDL Doubles/Triples endorsement in Illinois. These restrictions are in place to help ensure the safety of the driver, other motorists on the road, and the cargo being transported.
Here are some of the restrictions and limitations that apply to drivers with a CDL Doubles/Triples endorsement:
1. Weight Limits: Drivers with a Doubles/Triples endorsement are subject to weight limits for their vehicles and trailers. In Illinois, the maximum weight for a commercial vehicle with double/triple trailers is 80,000 pounds.
2. Length Limits: Drivers with a Doubles/Triples endorsement are also subject to length limits for their vehicles and trailers. In Illinois, the maximum combined length of a commercial vehicle with double/triple trailers is 65 feet.
3. Driving Restrictions: Drivers with a Doubles/Triples endorsement may be subject to additional driving restrictions based on the specific type of commercial vehicle they are operating. For example, drivers of vehicles with triple trailers may be restricted from certain roads or highways due to safety concerns.
4. Special Training Requirements: Drivers with a Doubles/Triples endorsement may be required to complete additional training before they can operate a commercial vehicle with double/triple trailers. This training may cover topics such as coupling and uncoupling procedures, trailer inspection and maintenance, and safe handling practices.
It is important for drivers with a CDL Doubles/Triples endorsement to understand these restrictions and limitations and comply with all applicable laws and regulations to ensure safe operation of their commercial vehicle.
Here are some of the restrictions and limitations that apply to drivers with a CDL Doubles/Triples endorsement:
1. Weight Limits: Drivers with a Doubles/Triples endorsement are subject to weight limits for their vehicles and trailers. In Illinois, the maximum weight for a commercial vehicle with double/triple trailers is 80,000 pounds.
2. Length Limits: Drivers with a Doubles/Triples endorsement are also subject to length limits for their vehicles and trailers. In Illinois, the maximum combined length of a commercial vehicle with double/triple trailers is 65 feet.
3. Driving Restrictions: Drivers with a Doubles/Triples endorsement may be subject to additional driving restrictions based on the specific type of commercial vehicle they are operating. For example, drivers of vehicles with triple trailers may be restricted from certain roads or highways due to safety concerns.
4. Special Training Requirements: Drivers with a Doubles/Triples endorsement may be required to complete additional training before they can operate a commercial vehicle with double/triple trailers. This training may cover topics such as coupling and uncoupling procedures, trailer inspection and maintenance, and safe handling practices.
It is important for drivers with a CDL Doubles/Triples endorsement to understand these restrictions and limitations and comply with all applicable laws and regulations to ensure safe operation of their commercial vehicle.
In Illinois, drivers with a CDL Doubles/Triples endorsement are subject to weight and length limits for their double/triple trailers. The maximum weight limit for a commercial vehicle with double/triple trailers is 80,000 pounds, which is the same as the weight limit for standard commercial vehicles.
However, the maximum length limit for a commercial vehicle with double/triple trailers is 65 feet. This means that the total length of the tractor, trailers, and load cannot exceed 65 feet in length.
It's important to note that these weight and length limits are based on Illinois state law and may vary by state. Drivers with a CDL Doubles/Triples endorsement should always check the laws and regulations in the states where they will be operating to ensure compliance with all applicable rules.
Additionally, drivers with a CDL Doubles/Triples endorsement may be subject to other restrictions or limitations based on the specific type of commercial vehicle they are operating. These may include driving restrictions or special training requirements to ensure safe operation of their vehicle.
However, the maximum length limit for a commercial vehicle with double/triple trailers is 65 feet. This means that the total length of the tractor, trailers, and load cannot exceed 65 feet in length.
It's important to note that these weight and length limits are based on Illinois state law and may vary by state. Drivers with a CDL Doubles/Triples endorsement should always check the laws and regulations in the states where they will be operating to ensure compliance with all applicable rules.
Additionally, drivers with a CDL Doubles/Triples endorsement may be subject to other restrictions or limitations based on the specific type of commercial vehicle they are operating. These may include driving restrictions or special training requirements to ensure safe operation of their vehicle.
Yes, there are specific safety considerations and regulations for driving double/triple trailers with a CDL Doubles/Triples endorsement in Illinois. These regulations are in place to ensure the safety of the driver, other motorists on the road, and the cargo being transported.
Here are some of the safety considerations and regulations that apply to drivers with a CDL Doubles/Triples endorsement:
1. Coupling and Uncoupling Procedures: Drivers must be familiar with proper coupling and uncoupling procedures for double/triple trailers. This includes ensuring that the couplings are securely connected, the safety chains are properly attached, and the brakes are properly adjusted.
2. Turning Procedures: Double/triple trailers require wider turns due to their length and may require more space to maneuver. Drivers should be aware of their vehicle's turning radius and take extra care when turning.
3. Braking Procedures: Double/triple trailers require more time and distance to come to a complete stop due to their increased weight. Drivers should allow extra space between their vehicle and other vehicles on the road and be prepared to brake earlier than they would with a standard commercial vehicle.
4. Inspection and Maintenance: Drivers must inspect their double/triple trailers before each trip to ensure that all components are in proper working order. This includes checking brakes, tires, lights, couplings, safety chains, and other critical components.
5. Special Training Requirements: Drivers with a Doubles/Triples endorsement may be required to complete additional training before they can operate a commercial vehicle with double/triple trailers. This training may cover topics such as coupling and uncoupling procedures, trailer inspection and maintenance, and safe handling practices.
It is important for drivers with a CDL Doubles/Triples endorsement to understand these safety considerations and regulations and comply with all applicable laws and regulations to ensure safe operation of their commercial vehicle.
Here are some of the safety considerations and regulations that apply to drivers with a CDL Doubles/Triples endorsement:
1. Coupling and Uncoupling Procedures: Drivers must be familiar with proper coupling and uncoupling procedures for double/triple trailers. This includes ensuring that the couplings are securely connected, the safety chains are properly attached, and the brakes are properly adjusted.
2. Turning Procedures: Double/triple trailers require wider turns due to their length and may require more space to maneuver. Drivers should be aware of their vehicle's turning radius and take extra care when turning.
3. Braking Procedures: Double/triple trailers require more time and distance to come to a complete stop due to their increased weight. Drivers should allow extra space between their vehicle and other vehicles on the road and be prepared to brake earlier than they would with a standard commercial vehicle.
4. Inspection and Maintenance: Drivers must inspect their double/triple trailers before each trip to ensure that all components are in proper working order. This includes checking brakes, tires, lights, couplings, safety chains, and other critical components.
5. Special Training Requirements: Drivers with a Doubles/Triples endorsement may be required to complete additional training before they can operate a commercial vehicle with double/triple trailers. This training may cover topics such as coupling and uncoupling procedures, trailer inspection and maintenance, and safe handling practices.
It is important for drivers with a CDL Doubles/Triples endorsement to understand these safety considerations and regulations and comply with all applicable laws and regulations to ensure safe operation of their commercial vehicle.
