Double
This endorsement is required if the driver will pull two or three trailers. To receive this endorsement, applicants must pass a test. The test consists of 20 multiple choice questions. To pass, the applicant must answer at least 16 questions correctly. Each question has three possible answer choices. Test questions come from the Idaho Commercial Driver’s License Manual. Questions come from chapters covering: Driving Safely, Transporting 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
1. Alcohol evaporators are:
Explanation
Some air brake systems include an alcohol evaporator. The evaporator introduces alcohol into the braking system to prevent the formation of ice, which can cause damage.
2. Rust around wheel nuts may mean:
Explanation
It is important to inspect your tires before every drive. Rust around wheel nuts may indicate that they are loose.
3. If the emergency air line loses pressure:
Explanation
The tractor protection valve keeps air in the trailer's braking system should the trailer break away or develop a leak. A loss of air pressure in the emergency line will cause the tractor protection valve to open and the emergency trailer brakes to activate.
4. If a vehicle's Anti-Lock Braking System (ABS) is malfunctioning:
Explanation
An Anti-Lock Braking System (ABS) intervenes to reduce brake pressure if there is a risk of wheel lockup. If the ABS isn't working, the vehicle's basic braking functions are not affected. A driver should continue to drive and brake in a normal manner.
5. If there is ice on the front of your side mirror:
Explanation
If your mirrors or wiper blades become icy while you are driving, you can expect the road surface to be icy as well.
6. Alcohol can be removed from your system:
Explanation
The liver removes alcohol from the body at a fixed rate, so the only way to sober up after consuming alcohol is to allow your body time to remove the alcohol on its own.
7. If a trailer begins to skid, it is best for the driver to:
Explanation
If your trailer begins to skid, you should release the brakes to regain traction. The trailer will begin to straighten out once the wheels begin to grip the road again.
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Frequently Asked Questions
To obtain a CDL Doubles/Triples endorsement in Idaho, follow these steps:
1. Meet the requirements: You must hold a valid Idaho CDL and be at least 21 years old to obtain the Doubles/Triples endorsement.
2. Study the Idaho CDL Driver's Manual: This manual covers all the information you need to know to pass the Doubles/Triples endorsement test.
3. Schedule an appointment: Contact your local Idaho DMV office to schedule an appointment for your written test.
4. Take the written test: The written test consists of 20 multiple-choice questions, and you must answer at least 16 questions correctly to pass.
5. Pay the fee: The fee for adding a Doubles/Triples endorsement to your CDL is $19.
6. Pass a skills test (if necessary): If you are adding the Doubles/Triples endorsement to your CDL for the first time, you may be required to take a skills test. This test will evaluate your ability to safely operate a vehicle with multiple trailers.
7. Receive your new CDL: Once you have passed the written test and any necessary skills tests, and paid the fee, you will receive a new CDL with your Doubles/Triples endorsement.
1. Meet the requirements: You must hold a valid Idaho CDL and be at least 21 years old to obtain the Doubles/Triples endorsement.
2. Study the Idaho CDL Driver's Manual: This manual covers all the information you need to know to pass the Doubles/Triples endorsement test.
3. Schedule an appointment: Contact your local Idaho DMV office to schedule an appointment for your written test.
4. Take the written test: The written test consists of 20 multiple-choice questions, and you must answer at least 16 questions correctly to pass.
5. Pay the fee: The fee for adding a Doubles/Triples endorsement to your CDL is $19.
6. Pass a skills test (if necessary): If you are adding the Doubles/Triples endorsement to your CDL for the first time, you may be required to take a skills test. This test will evaluate your ability to safely operate a vehicle with multiple trailers.
7. Receive your new CDL: Once you have passed the written test and any necessary skills tests, and paid the fee, you will receive a new CDL with your Doubles/Triples endorsement.
To obtain a CDL Doubles/Triples license in Idaho, you must meet the following requirements:
1. Hold a valid Idaho CDL: You must already have a valid Idaho Commercial Driver's License (CDL) before applying for the Doubles/Triples endorsement.
2. Be at least 21 years old: To operate a vehicle with multiple trailers, you must be at least 21 years old.
3. Pass the written test: You must pass the Doubles/Triples endorsement written test which covers topics such as coupling and uncoupling, inspecting doubles and triples, and driving combinations.
4. Pass the skills test (if applicable): If you are adding the Doubles/Triples endorsement to your CDL for the first time, you may be required to take a skills test. This test will evaluate your ability to safely operate a vehicle with multiple trailers.
5. Pay the fee: The fee for adding a Doubles/Triples endorsement to your CDL is $19.
6. Meet any additional requirements: Depending on your specific situation, there may be additional requirements or restrictions that apply to your CDL Doubles/Triples license. It's important to check with your local DMV office for any additional information or requirements.
1. Hold a valid Idaho CDL: You must already have a valid Idaho Commercial Driver's License (CDL) before applying for the Doubles/Triples endorsement.
2. Be at least 21 years old: To operate a vehicle with multiple trailers, you must be at least 21 years old.
3. Pass the written test: You must pass the Doubles/Triples endorsement written test which covers topics such as coupling and uncoupling, inspecting doubles and triples, and driving combinations.
4. Pass the skills test (if applicable): If you are adding the Doubles/Triples endorsement to your CDL for the first time, you may be required to take a skills test. This test will evaluate your ability to safely operate a vehicle with multiple trailers.
5. Pay the fee: The fee for adding a Doubles/Triples endorsement to your CDL is $19.
6. Meet any additional requirements: Depending on your specific situation, there may be additional requirements or restrictions that apply to your CDL Doubles/Triples license. It's important to check with your local DMV office for any additional information or requirements.
Yes, there are specific experience and training requirements to obtain a CDL Doubles/Triples endorsement in Idaho. You must complete a training program or have previous experience driving combination vehicles to be eligible for the Doubles/Triples endorsement.
The Federal Motor Carrier Safety Administration (FMCSA) requires that all drivers seeking a CDL Doubles/Triples endorsement complete a training program that includes both classroom instruction and behind-the-wheel training. The program must cover topics such as:
- Inspecting and coupling/uncoupling doubles/triples
- Checking air brakes
- Maneuvering doubles/triples in tight spaces
- Handling emergencies
- Driving safely with multiple trailers
If you have previous experience driving combination vehicles, you may be exempt from the training requirements. However, you will still need to pass the Doubles/Triples endorsement written test and any necessary skills tests.
It's important to note that individual employers may have additional requirements beyond the state and federal requirements. Before pursuing a CDL Doubles/Triples endorsement, it's a good idea to check with potential employers to verify their specific requirements.
The Federal Motor Carrier Safety Administration (FMCSA) requires that all drivers seeking a CDL Doubles/Triples endorsement complete a training program that includes both classroom instruction and behind-the-wheel training. The program must cover topics such as:
- Inspecting and coupling/uncoupling doubles/triples
- Checking air brakes
- Maneuvering doubles/triples in tight spaces
- Handling emergencies
- Driving safely with multiple trailers
If you have previous experience driving combination vehicles, you may be exempt from the training requirements. However, you will still need to pass the Doubles/Triples endorsement written test and any necessary skills tests.
It's important to note that individual employers may have additional requirements beyond the state and federal requirements. Before pursuing a CDL Doubles/Triples endorsement, it's a good idea to check with potential employers to verify their specific requirements.
Yes, to obtain a CDL Doubles/Triples endorsement in Idaho, you will need to pass an additional written test specifically for this endorsement. The written test is designed to evaluate your knowledge of the rules and regulations related to operating a vehicle with multiple trailers.
The test will cover topics such as:
- Coupling and uncoupling doubles and triples
- Inspecting doubles and triples
- Driving combinations safely
- Handling emergencies
You will need to pass this written test with a score of at least 80% to receive your CDL Doubles/Triples endorsement. Additionally, if you are adding the Doubles/Triples endorsement for the first time, you may also be required to take a skills test to demonstrate your ability to safely operate a vehicle with multiple trailers.
It's important to note that the requirements for obtaining a CDL Doubles/Triples endorsement may vary by state. Be sure to check with your local DMV office or commercial driver training school for specific information on the requirements in your area.
The test will cover topics such as:
- Coupling and uncoupling doubles and triples
- Inspecting doubles and triples
- Driving combinations safely
- Handling emergencies
You will need to pass this written test with a score of at least 80% to receive your CDL Doubles/Triples endorsement. Additionally, if you are adding the Doubles/Triples endorsement for the first time, you may also be required to take a skills test to demonstrate your ability to safely operate a vehicle with multiple trailers.
It's important to note that the requirements for obtaining a CDL Doubles/Triples endorsement may vary by state. Be sure to check with your local DMV office or commercial driver training school for specific information on the requirements in your area.
To obtain a CDL Doubles/Triples endorsement in Idaho, you will be required to pass a skills test in addition to the written test. The skills test is designed to evaluate your ability to safely operate a vehicle with multiple trailers. During the test, you will be required to demonstrate the following skills and maneuvers:
1. Pre-trip inspection: You will need to perform a thorough inspection of your vehicle and trailers, checking for any potential safety hazards or mechanical issues.
2. Coupling and uncoupling: You will need to safely couple and uncouple the trailers, ensuring that all connections are secure.
3. Straight-line backing: You will need to back up the vehicle in a straight line for a distance of at least 100 feet.
4. 90-degree alley dock: You will need to back up the vehicle into a narrow space that is 90 degrees from its starting position.
5. Offset backing: You will need to back up the vehicle into a space that is offset from its starting position.
6. Serpentine backing: You will need to back up the vehicle through a series of curves or turns.
7. Driving on public roads: You will need to safely operate the vehicle with multiple trailers on public roads, obeying all traffic laws and regulations.
During the skills test, you will be evaluated on your ability to complete each maneuver safely and effectively. It's important to practice these skills thoroughly before taking the test, and to ensure that you are familiar with all of the rules and regulations related to operating a vehicle with multiple trailers.
1. Pre-trip inspection: You will need to perform a thorough inspection of your vehicle and trailers, checking for any potential safety hazards or mechanical issues.
2. Coupling and uncoupling: You will need to safely couple and uncouple the trailers, ensuring that all connections are secure.
3. Straight-line backing: You will need to back up the vehicle in a straight line for a distance of at least 100 feet.
4. 90-degree alley dock: You will need to back up the vehicle into a narrow space that is 90 degrees from its starting position.
5. Offset backing: You will need to back up the vehicle into a space that is offset from its starting position.
6. Serpentine backing: You will need to back up the vehicle through a series of curves or turns.
7. Driving on public roads: You will need to safely operate the vehicle with multiple trailers on public roads, obeying all traffic laws and regulations.
During the skills test, you will be evaluated on your ability to complete each maneuver safely and effectively. It's important to practice these skills thoroughly before taking the test, and to ensure that you are familiar with all of the rules and regulations related to operating a vehicle with multiple trailers.
No, you cannot legally operate a combination of double or triple trailers without a CDL Doubles/Triples endorsement. In Idaho and most other states, a CDL Doubles/Triples endorsement is required to operate a commercial motor vehicle with multiple trailers.
The Federal Motor Carrier Safety Administration (FMCSA) requires drivers to have a CDL Doubles/Triples endorsement if they want to operate a combination of vehicles with two or three trailers. This endorsement also applies to drivers who want to operate a tractor-trailer combination with more than one trailer.
It is important to note that driving a commercial motor vehicle with multiple trailers requires additional knowledge and skills, which is why the CDL Doubles/Triples endorsement is required. To obtain this endorsement, you will need to pass a written test and a skills test, demonstrating your knowledge and ability to safely operate a vehicle with multiple trailers.
If you are caught operating a commercial motor vehicle with multiple trailers without the proper CDL endorsement, you may face fines, penalties, and even the suspension of your CDL. It's important to make sure you have the proper endorsements before operating any type of commercial motor vehicle.
The Federal Motor Carrier Safety Administration (FMCSA) requires drivers to have a CDL Doubles/Triples endorsement if they want to operate a combination of vehicles with two or three trailers. This endorsement also applies to drivers who want to operate a tractor-trailer combination with more than one trailer.
It is important to note that driving a commercial motor vehicle with multiple trailers requires additional knowledge and skills, which is why the CDL Doubles/Triples endorsement is required. To obtain this endorsement, you will need to pass a written test and a skills test, demonstrating your knowledge and ability to safely operate a vehicle with multiple trailers.
If you are caught operating a commercial motor vehicle with multiple trailers without the proper CDL endorsement, you may face fines, penalties, and even the suspension of your CDL. It's important to make sure you have the proper endorsements before operating any type of commercial motor vehicle.
You can add the CDL Doubles/Triples endorsement to your existing CDL license in Idaho. To obtain the endorsement, you will need to pass a written test and a skills test.
Here are the steps to add the CDL Doubles/Triples endorsement to your existing CDL in Idaho:
1. Study the Idaho CDL manual: The Idaho CDL manual includes information about the Doubles/Triples endorsement and what you can expect on the written test.
2. Schedule and pass the written test: Contact your local Idaho DMV office to schedule a time to take the written test. The test will cover topics such as coupling and uncoupling, inspecting doubles/triples, and safe driving practices.
3. Schedule and pass the skills test: Once you have passed the written test, you can schedule a time to take the skills test. The skills test will evaluate your ability to operate a vehicle with multiple trailers safely.
4. Pay any applicable fees: There may be fees associated with adding the Doubles/Triples endorsement to your CDL license. Contact your local DMV office for information on any applicable fees.
Once you have passed both the written and skills tests, and paid any applicable fees, your CDL license will be updated to include the Doubles/Triples endorsement. It's important to note that you must already have a valid CDL license before adding any endorsements.
Here are the steps to add the CDL Doubles/Triples endorsement to your existing CDL in Idaho:
1. Study the Idaho CDL manual: The Idaho CDL manual includes information about the Doubles/Triples endorsement and what you can expect on the written test.
2. Schedule and pass the written test: Contact your local Idaho DMV office to schedule a time to take the written test. The test will cover topics such as coupling and uncoupling, inspecting doubles/triples, and safe driving practices.
3. Schedule and pass the skills test: Once you have passed the written test, you can schedule a time to take the skills test. The skills test will evaluate your ability to operate a vehicle with multiple trailers safely.
4. Pay any applicable fees: There may be fees associated with adding the Doubles/Triples endorsement to your CDL license. Contact your local DMV office for information on any applicable fees.
Once you have passed both the written and skills tests, and paid any applicable fees, your CDL license will be updated to include the Doubles/Triples endorsement. It's important to note that you must already have a valid CDL license before adding any endorsements.
Yes, there are specific restrictions and limitations that apply to drivers with a CDL Doubles/Triples endorsement in Idaho. These restrictions are in place to ensure the safety of the driver, other motorists, and the cargo being transported.
Here are some of the restrictions and limitations that apply to drivers with a CDL Doubles/Triples endorsement in Idaho:
1. Length limitations: The total length of the combination of vehicles cannot exceed 68 feet for doubles or 75 feet for triples.
2. Weight limitations: The gross vehicle weight (GVW) cannot exceed 80,000 pounds for doubles or triples.
3. Route limitations: There may be certain routes that are restricted for vehicles with multiple trailers. Drivers should check with local authorities to determine any restrictions or limitations on the route they plan to take.
4. Additional training requirements: In addition to obtaining a CDL Doubles/Triples endorsement, drivers may also be required to undergo additional training before operating a vehicle with multiple trailers.
5. Increased stopping distance: Drivers must be aware that vehicles with multiple trailers require additional stopping distance, especially in adverse weather conditions or when traveling at high speeds.
It's important for drivers with a CDL Doubles/Triples endorsement to understand and follow these restrictions and limitations to ensure the safety of themselves and others on the road.
Here are some of the restrictions and limitations that apply to drivers with a CDL Doubles/Triples endorsement in Idaho:
1. Length limitations: The total length of the combination of vehicles cannot exceed 68 feet for doubles or 75 feet for triples.
2. Weight limitations: The gross vehicle weight (GVW) cannot exceed 80,000 pounds for doubles or triples.
3. Route limitations: There may be certain routes that are restricted for vehicles with multiple trailers. Drivers should check with local authorities to determine any restrictions or limitations on the route they plan to take.
4. Additional training requirements: In addition to obtaining a CDL Doubles/Triples endorsement, drivers may also be required to undergo additional training before operating a vehicle with multiple trailers.
5. Increased stopping distance: Drivers must be aware that vehicles with multiple trailers require additional stopping distance, especially in adverse weather conditions or when traveling at high speeds.
It's important for drivers with a CDL Doubles/Triples endorsement to understand and follow these restrictions and limitations to ensure the safety of themselves and others on the road.
In Idaho, drivers with a CDL Doubles/Triples endorsement are subject to weight and length limits when operating double or triple trailers. These limits are in place to ensure the safety of the driver, other motorists, and the cargo being transported.
Here are the maximum weight and length limits for double/triple trailers with a CDL Doubles/Triples endorsement in Idaho:
1. Weight limit: The maximum gross vehicle weight (GVW) for double trailers is 80,000 pounds. The maximum GVW for triple trailers is also 80,000 pounds.
2. Length limit: The maximum length for double trailers is 28 feet for each trailer. The maximum length for triple trailers is 28 feet for each trailer.
It's important for drivers with a CDL Doubles/Triples endorsement to be aware of these weight and length limits and to ensure that their vehicle does not exceed them. Exceeding these limits can result in fines, penalties, and potential safety hazards on the road.
Here are the maximum weight and length limits for double/triple trailers with a CDL Doubles/Triples endorsement in Idaho:
1. Weight limit: The maximum gross vehicle weight (GVW) for double trailers is 80,000 pounds. The maximum GVW for triple trailers is also 80,000 pounds.
2. Length limit: The maximum length for double trailers is 28 feet for each trailer. The maximum length for triple trailers is 28 feet for each trailer.
It's important for drivers with a CDL Doubles/Triples endorsement to be aware of these weight and length limits and to ensure that their vehicle does not exceed them. Exceeding these limits can result in fines, penalties, and potential safety hazards on the road.
Yes, there are specific safety considerations and regulations that drivers with a CDL Doubles/Triples endorsement must follow when driving double or triple trailers. These regulations are in place to ensure the safety of the driver, other motorists, and the cargo being transported.
Here are some of the specific safety considerations and regulations for driving double/triple trailers with a CDL Doubles/Triples endorsement in Idaho:
1. Increased stopping distance: Vehicles with multiple trailers require additional stopping distance, especially in adverse weather conditions or when traveling at high speeds.
2. Proper weight distribution: Drivers must ensure that weight is distributed evenly between the trailers to prevent instability or loss of control.
3. Adequate space: Drivers must allow for adequate space when changing lanes, merging, turning, and maneuvering in traffic.
4. Route restrictions: Certain routes may be restricted for vehicles with multiple trailers. Drivers should check with local authorities to determine any restrictions or limitations on the route they plan to take.
5. Additional training requirements: In addition to obtaining a CDL Doubles/Triples endorsement, drivers may also be required to undergo additional training before operating a vehicle with multiple trailers.
6. Regular vehicle inspections: Drivers must regularly inspect their vehicle and trailer(s) before and during trips to ensure that they are in good working condition.
It's important for drivers with a CDL Doubles/Triples endorsement to be aware of these safety considerations and regulations and to follow them at all times. Failure to do so can result in fines, penalties, and potential safety hazards on the road.
Here are some of the specific safety considerations and regulations for driving double/triple trailers with a CDL Doubles/Triples endorsement in Idaho:
1. Increased stopping distance: Vehicles with multiple trailers require additional stopping distance, especially in adverse weather conditions or when traveling at high speeds.
2. Proper weight distribution: Drivers must ensure that weight is distributed evenly between the trailers to prevent instability or loss of control.
3. Adequate space: Drivers must allow for adequate space when changing lanes, merging, turning, and maneuvering in traffic.
4. Route restrictions: Certain routes may be restricted for vehicles with multiple trailers. Drivers should check with local authorities to determine any restrictions or limitations on the route they plan to take.
5. Additional training requirements: In addition to obtaining a CDL Doubles/Triples endorsement, drivers may also be required to undergo additional training before operating a vehicle with multiple trailers.
6. Regular vehicle inspections: Drivers must regularly inspect their vehicle and trailer(s) before and during trips to ensure that they are in good working condition.
It's important for drivers with a CDL Doubles/Triples endorsement to be aware of these safety considerations and regulations and to follow them at all times. Failure to do so can result in fines, penalties, and potential safety hazards on the road.
