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 Commercial Driver 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.
1. Bobtail tractors are ____ to stop than tractors attached to full semitrailers.
Bobtail tractors are tractors that are not attached to any semitrailers. When operating a bobtail, you should be aware that stopping can be difficult and that it will take a longer distance to come to a complete stop than a tractor attached to a loaded semitrailer.
2. What is road rage?
Aggressive driving is defined as operating a motor vehicle in a selfish, bold, or pushy manner. Road rage is defined as operating a motor vehicle with the intent of doing harm to others, or the intent of physically assaulting another driver or their vehicle.
3. When should you slow for a curve?
You should always slow to a safe speed before entering a curve. Slowing while within the curve could cause a skid.
4. When starting your vehicle, the coolant temperature should:
Watch the gauges in your vehicle before starting a trip. After starting your vehicle's engine, the coolant temperature should begin a gradual rise to the normal operating range.
5. A tread depth of ____ should be in every major groove of a front tire.
For safe operation, a commercial motor vehicle needs a tread depth of 4/32 of an inch in every major groove on the front tires, and a tread depth of 2/32 of an inch on other tires.
6. When making a left turn, you should start the turn:
When making a left turn, you should wait until you reach the center of the intersection before actually beginning to turn. Due to off-tracking, the left side of your vehicle could hit another driver if you begin turning too early.
7. To change lanes, you should:
Always change lanes slowly and smoothly. If you did not see drivers who are already using the lane you wish to occupy, this will give them a chance to get out of your way or honk their horns to alert you. Always signal when changing lanes.
Frequently Asked Questions
1. Obtain a Washington State Commercial Driver's License (CDL) by passing the general knowledge written test, a skills test, and a medical exam.
2. Study the Washington State Commercial Driver Guide to learn about the requirements, restrictions, and regulations for driving double and triple trailers.
3. Schedule an appointment with a Washington Department of Licensing (DOL) office that offers CDL testing.
4. Pass the CDL Doubles/Triples endorsement knowledge test, which covers topics such as coupling and uncoupling, inspecting double/triple trailers, and driving double/triple trailers.
5. Pay the fee for the Doubles/Triples endorsement.
6. Once you have passed the written test and paid the fee, you will receive a permit that allows you to practice driving double/triple trailers under supervision.
7. When you are ready, schedule a skills test appointment with the DOL office to demonstrate your ability to safely operate double/triple trailers on the road.
8. Pass the skills test and receive your CDL Doubles/Triples endorsement.
It is important to note that before applying for a Doubles/Triples endorsement, you must already have a CDL Class A license. Additionally, you must be at least 21 years old to drive double/triple trailers in interstate commerce or 18 years old for intrastate commerce only.
1. Be at least 21 years old to drive double/triple trailers in interstate commerce or 18 years old for intrastate commerce only.
2. Hold a valid Washington State Commercial Driver's License (CDL) Class A.
3. Pass the CDL Doubles/Triples endorsement knowledge test, which covers topics such as coupling and uncoupling, inspecting double/triple trailers, and driving double/triple trailers.
4. Pay the fee for the Doubles/Triples endorsement.
5. Pass a skills test demonstrating your ability to safely operate double/triple trailers on the road.
It is also important to note that you will be required to have a medical certificate that proves you are physically qualified to operate a commercial motor vehicle when applying for your CDL. Additionally, you must not have any disqualifying criminal convictions and must provide proof of your identity and residency in Washington State.
To prepare for the Doubles/Triples endorsement knowledge test and the skills test, you can study the Washington State Commercial Driver Guide, which covers the information needed to safely operate double/triple trailers. You may also choose to take a CDL training course offered by a certified truck driving school or training organization, which can provide you with hands-on experience and instruction specific to driving double/triple trailers.
Ultimately, it is your responsibility to ensure that you have the knowledge and skills necessary to operate a commercial motor vehicle safely and effectively, including double/triple trailers if you choose to pursue that endorsement.
1. Inspecting double/triple trailers.
2. Coupling and uncoupling double/triple trailers.
3. Driving double/triple trailers.
4. Checking air brakes and electrical systems on double/triple trailers.
5. Understanding weight distribution and load securement for double/triple trailers.
You will need to pass this test in addition to the general knowledge test required for obtaining a standard CDL license.
It is important to note that you cannot take the CDL Doubles/Triples endorsement test without first passing the general knowledge test and obtaining a CDL Class A license in Washington State. Also, you will need to pay a fee to take the endorsement test, in addition to any fees associated with obtaining or renewing your CDL license.
1. Vehicle inspection: You will need to perform a thorough inspection of the double/triple trailers, including checking the air brake system, coupling and uncoupling the trailers, and ensuring that the load is properly secured.
2. Basic control skills: You will need to demonstrate your ability to control the double/triple trailers in a controlled environment. This may include backing up in a straight line, making turns, and parking.
3. On-road driving: You will need to demonstrate your ability to safely operate the double/triple trailers on public roads. This may include merging onto highways, changing lanes, turning at intersections, and driving in traffic.
During the skills test, you will be evaluated on your ability to safely and effectively operate double/triple trailers in a variety of situations. It is important to practice these maneuvers beforehand and be prepared for the test. If you feel unsure about any particular skill or maneuver, consider taking a CDL training course offered by a certified truck driving school or training organization.
The CDL Doubles/Triples endorsement allows you to legally operate double/triple trailers, which are two or three separate trailers attached to each other and pulled by a single tractor. These types of trailers require additional skills and knowledge to operate safely and efficiently.
It is important to note that operating double/triple trailers without the proper endorsement is illegal and can result in fines, penalties, and even the suspension or revocation of your CDL license. It is always best to obtain the appropriate endorsements and meet all legal requirements before operating any commercial vehicle on public roads.
To add the endorsement, you will need to:
1. Study for the Doubles/Triples endorsement test by reviewing the Washington State Commercial Driver Guide and other study materials.
2. Pass the Doubles/Triples endorsement knowledge test at a Washington State Department of Licensing (DOL) driver licensing office.
3. Practice driving double/triple trailers with a qualified instructor or trainer, if necessary.
4. Pass the Doubles/Triples endorsement skills test, which includes a pre-trip inspection, basic control skills, and on-road driving.
Once you have successfully passed both tests, you can add the CDL Doubles/Triples endorsement to your existing CDL license at a DOL driver licensing office. You will need to pay a fee for the endorsement and possibly for any additional knowledge or skills tests required.
It is important to note that you must have a valid CDL license before you can add any endorsements. Additionally, if your CDL license is due for renewal soon, it may be a good time to add any necessary endorsements or make any other necessary updates to your license.
Here are some of the most important restrictions and limitations to be aware of:
1. Vehicle weight: Drivers with a Doubles/Triples endorsement are limited to operating combination vehicles with a gross vehicle weight rating (GVWR) of 80,000 pounds or less.
2. Trailer length: The total length of the combination of vehicles cannot exceed 75 feet, including the tractor.
3. Trailer types: Drivers with a Doubles/Triples endorsement are only allowed to pull two or three trailers specifically designed for towing purposes.
4. Driving conditions: Drivers with a Doubles/Triples endorsement are prohibited from operating double/triple trailers during hazardous weather conditions such as snow, ice, or heavy rain.
5. Training requirements: Before operating double/triple trailers, drivers must complete specialized training that includes both classroom instruction and behind-the-wheel training.
It is important for drivers with a CDL Doubles/Triples endorsement to be aware of these restrictions and limitations and to follow all applicable laws and regulations. Violating these restrictions can result in fines, penalties, and even the suspension or revocation of your CDL license.
Here are the maximum weight and length limits for double/triple trailers with a CDL Doubles/Triples endorsement:
1. Weight limit: The combined gross vehicle weight (GVW) of the tractor and trailers cannot exceed 80,000 pounds.
2. Length limit: The total length of the vehicle combination cannot exceed 75 feet, including the tractor.
It is important to note that these weight and length limits are subject to change based on federal and state regulations. Drivers with a CDL Doubles/Triples endorsement should always stay up-to-date on any changes to weight and length limits by checking with the Washington State Department of Licensing (DOL) or other relevant authorities.
Additionally, drivers should always ensure that they are properly trained and equipped to handle double/triple trailers before operating them on public roads. This includes completing specialized training that includes both classroom instruction and behind-the-wheel training.
Here are some of the key safety considerations and regulations for driving double/triple trailers with a CDL Doubles/Triples endorsement:
1. Specialized training: Before operating double/triple trailers, drivers must complete specialized training that includes both classroom instruction and behind-the-wheel training. This training covers topics such as vehicle handling, coupling and uncoupling trailers, and driving techniques.
2. Vehicle inspection: Drivers must perform a thorough inspection of their vehicle before each trip to ensure that it is in safe operating condition. This includes checking the brakes, tires, lights, and other critical components.
3. Weight distribution: Drivers must ensure that their cargo is properly distributed within their trailers to prevent overloading or instability.
4. Speed limits: Drivers should observe posted speed limits and adjust their speed based on road conditions and weather.
5. Driving conditions: Drivers should avoid driving in hazardous weather conditions such as snow, ice, or heavy rain.
6. Following distance: Drivers should maintain a safe following distance from other vehicles on the road to allow for sudden stops or emergencies.
7. Turning radius: Double/triple trailers require a wider turning radius than single vehicles. Drivers should be aware of this when making turns and avoid making sharp turns.
8. Parking: Double/triple trailers require more space for parking than single vehicles. Drivers should be aware of this when choosing where to park.
Drivers with a CDL Doubles/Triples endorsement should always follow these safety considerations and regulations to ensure the safe operation of their vehicle on public roads. Violating these regulations can result in fines, penalties, and even the suspension or revocation of your CDL license.