Combination #1
Combination Vehicles Practice Test | Virginia 2024 #1 Page 3 of 3
Train for FREE online with our Virginia CDL combination vehicle test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a VA combination license in 2024, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that DMV requirements for issuing a combination license may vary from state to state.
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15 . A trolley valve:
The trailer hand valve (also referred to as the trolley valve or Johnson bar) is a mechanism that works the trailer brakes. It should only be used to test the brakes. Using it while the vehicle is being driven could cause a skid. Never use the trailer hand valve while parking because doing so may release the air pressure from the braking system, releasing the brakes that are holding the vehicle in place.
16 . If unsure if a trailer has an Anti-Lock Braking System (ABS), you can:
If you do not know whether or not a trailer is equipped with ABS, look under the vehicle for the electronic control unit and wheel speed sensor wires coming from the back of the brakes.
17 . The "crack-the-whip" effect can:
Trailers can overturn as a result of the "crack-the-whip" effect. The last trailer in a combination is the most prone to tip over due to this effect. Drivers should be aware of the rearward amplification of their specific vehicles and drive accordingly.
18 . To find out if a vehicle that was built before 1998 has an Anti-Lock Braking System (ABS), you can:
If you are operating a vehicle built before 1998 and are unsure if the trailer has an Anti-Lock Braking System (ABS), you can check under the trailer for wheel speed sensors coming from the back of the brakes.
19 . If a load is placed on one side of a trailer, the trailer:
Positioning the weight of a load on one side of a trailer may cause the trailer to lean to that side, increasing the risk of a rollover during turns and lane changes.
20 . Keeping cargo low can:
Rollovers can happen when a combination vehicle is turned too quickly. To help prevent the risk of rollover, it is important to keep the vehicle's center of gravity low by loading cargo as close to the ground as possible.
2024 Virginia | Frequently Asked Questions
In Virginia, to secure a CDL Doubles/Triples endorsement, you must have a valid Commercial Driver's License (CDL). Start by studying the appropriate section in the Virginia CDL manual. Then, pass the written knowledge test at a DMV customer service center. You must also pass a skills test in a vehicle representative of the type you'll be driving.
To obtain a CDL Doubles/Triples license, you need a valid Commercial Driver's License (CDL). You must study the Doubles/Triples section in the CDL manual, pass a written knowledge test at your local DMV, and complete a skills test in a vehicle similar to what you plan to drive. This endorsement is required to drive vehicles pulling two or three trailers.
While Virginia doesn't mandate specialized experience or training for a CDL Doubles/Triples endorsement, it's recommended. You must have a valid CDL, pass the written knowledge test, and successfully complete a skills test in a representative vehicle. Practical training can help with these tests and safely operating such vehicles. Always check with your local DMV for specific requirements.
Yes, to obtain a CDL Doubles/Triples endorsement in Virginia, you must pass an additional written knowledge test specifically for this endorsement. This test covers topics like coupling and uncoupling, inspecting doubles and triples, and managing cargo. The test is based on the Doubles/Triples section in the CDL manual. No extra driving exam is required if you already hold a CDL.
For the CDL Doubles/Triples endorsement in Virginia, you don't have to perform a specific driving test. However, the written test covers important topics including coupling/uncoupling procedures, inspecting doubles/triples, and managing cargo. Understanding these skills is critical for safety. It's beneficial to practice these maneuvers even though they are not part of a specific driving test.
No, it's not permissible to operate double or triple trailers without a valid CDL Doubles/Triples endorsement in Virginia. The endorsement is a legal requirement that ensures you have the necessary knowledge and skills to safely operate such vehicles. Driving without the proper endorsement can result in hefty fines and penalties.
In Virginia, you can add the CDL Doubles/Triples endorsement to your existing commercial driver's license. You don't need to initiate a new application for a CDL. However, you'll need to pass the Doubles/Triples knowledge test and pay an applicable fee to add this endorsement to your current CDL.
Yes, even with a CDL Doubles/Triples endorsement, there are restrictions. In Virginia, drivers can only operate doubles/triples on specific highways and during certain hours. Also, the total weight of the trailers cannot exceed the Gross Vehicle Weight Rating. Drivers must also comply with all federal and state laws regarding rest periods and hours of service.
In Virginia, the maximum weight limit for double/triple trailers is 80,000 pounds. The maximum length for a double trailer is 61 feet for the two trailers combined, while the maximum length for a triple trailer combination is 75 feet. These limits can vary depending on the road type and may be subject to change based on state regulations.
Yes, there are specific safety guidelines for driving double/triple trailers. Drivers must ensure the securement of the cargo and conduct pre-trip inspections. They must also maintain a safe following distance, avoid sudden stops or lane changes, and understand the high rollover risk. Virginia adheres to Federal Motor Carrier Safety Regulations, which provide extensive safety rules for commercial vehicles.