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Double Triple Test | Missouri 2026 #2 Page 3 of 3
Train for FREE with our Missouri CDL double triple practice test online. 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 MO CDL double triple license in 2026, 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 may vary from state to state.
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15 . Maintaining a cushion of space between your vehicle and the vehicle ahead is:
For safe driving, it is essential that you maintain cushions of space on all sides of your vehicle. This helps to ensure that you will have time to take appropriate action if a problem arises.
16 . Air tank drains should:
Compressed air in an air brake system usually contains a certain amount of water and compressor oil. The water and oil can damage the brakes if left to accumulate in the system. Manually operated air tank drains must be opened daily to remove this build-up.
17 . Which of the following is a sign that brakes will need repair?
When inspecting your brakes, you should check for cracked drums; shoes or pads covered in oil, grease, or brake fluid; and shoes that are missing, broken, or worn dangerously thin.
18 . A trailer that is not at the proper height:
Before coupling together a tractor and a trailer, you should make sure the trailer is at the proper height. If the trailer is too low, the trailer nose may be damaged. If the trailer is too high, it may not be able to couple correctly.
19 . When starting an engine, oil pressure should come up to a normal level:
Look at your truck's gauges when starting the engine. The oil pressure in an engine should come up to a normal level within seconds of the vehicle's engine being started.
20 . When approaching your vehicle as part of your pre-trip inspection, you should look for what as a sign of trouble?
When approaching your vehicle for an inspection, you should look underneath the vehicle for fresh leaks of oil, coolant, grease, or fuel. Seeing a fresh puddle of any of these fluids could indicate a safety issue with your vehicle.
2026 Missouri | Frequently Asked Questions
To secure a Doubles/Triples endorsement for your CDL in Missouri, you'll need to pass the Doubles/Triples Knowledge Test. This involves studying the relevant section in the Missouri CDL manual. After passing, you'll receive the endorsement on your CDL. Note, having a valid CDL and being at least 18 years old are prerequisites.
To obtain a CDL Doubles/Triples license, you must already have a valid CDL. You'll need to pass the Doubles/Triples Knowledge Test, which includes questions on coupling/uncoupling, inspecting doubles/triples, and handling. Study materials can be found in the CDL manual. Applicants must be at least 18 years old and meet all physical requirements.
No specialized experience or training is legally required for a CDL Doubles/Triples endorsement in Missouri. However, you must pass the Doubles/Triples Knowledge Test. Studying the relevant sections in the Missouri CDL manual can help prepare you. Practical experience or training in handling doubles/triples can be beneficial but isn't mandatory.
Yes, to receive a CDL Doubles/Triples endorsement in Missouri, you must take and pass the Doubles/Triples Knowledge Test. This test covers specific knowledge areas including coupling and uncoupling, inspecting doubles/triples, and handling of these types of vehicles. No additional driving skills test is required for this endorsement.
For the CDL Doubles/Triples endorsement in Missouri, there's no specific driving skills test. However, the Doubles/Triples Knowledge Test covers areas like coupling and uncoupling, inspecting doubles and triples, and handling these vehicles. It's important to understand these aspects theoretically, even though you don't have to demonstrate them practically for the test.
No, it is not permissible to operate double/triple trailers without a valid CDL Doubles/Triples endorsement in Missouri. Driving such vehicles without the proper endorsement is considered illegal and may lead to penalties, fines, or suspension of your commercial driving license. Always ensure you have the correct endorsements for the vehicle you are operating.
You can append the CDL Doubles/Triples endorsement to your current CDL. You don't need to initiate a new application for a CDL. However, you will need to pass the Doubles/Triples endorsement written test and pay the required fee to add this endorsement to your existing license in Missouri.
Yes, there are limitations for drivers holding a CDL Doubles/Triples endorsement in Missouri. Drivers must not exceed the maximum length and weight limits for double/triple trailers. They should also have a good driving record, pass the required knowledge tests, and maintain their physical health to meet the demands of driving larger, more complex vehicles.
The maximum weight for a double trailer in Missouri is 80,000 lbs and the maximum length is 81.5 feet. For triple trailers, the maximum gross weight is also 80,000 lbs, but the maximum length varies. It's important to note that these restrictions can change and it's recommended to check with local authorities for the most current regulations.
Yes, there are specific safety guidelines. Drivers must ensure proper coupling and uncoupling of trailers, correctly distribute the weight for safe handling, check all brake connections and trailer height before driving. Additionally, they must maintain a safe following distance, manage high-speed risks, and monitor the effect of wind and other weather conditions on the vehicle.