Combination #1
Combination Vehicles Practice Test | Missouri 2025 #1
Train for FREE online with our Missouri 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 MO combination license in 2025, 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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1 . A tractor protection valve:
A tractor protection valve keeps air in a tractor or truck air brake system should the trailer break away or develop a bad leak. The valve will close automatically if the pressure drops to an unsafe level.
2 . In a double or triple combination, the ____ trailer should be directly behind the cab.
When positioning trailers in a combination, the most heavily-loaded trailer should be the closest to the tractor. The lightest trailer should be positioned in the rear.
3 . How much space should be between the upper and lower fifth wheel?
Before a trip, be sure to inspect all couplings. There should be no space between the upper and lower fifth wheel.
4 . When coupling, you should:
When coupling air brake hoses, you should make sure the proper pairs of gland hands are connected. They are sometimes color-coded to help drivers avoid mistakes. Typically, blue is used for service lines and red is used for emergency lines.
5 . Shut-off valves:
Shut-off valves are used in air supply lines to control the passage of air from one trailer to another. The rear shut-off valve should always be closed to prevent air from leaving the braking system.
6 . If the emergency air line loses pressure:
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.
7 . If color-coded, which color is used to identify service lines?
Air lines are sometimes color-coded to help drivers avoid mistakes when coupling glad hands. Typically, blue is used for service lines and red is used for emergency lines.
See the exact questions that will be on the 2025 Missouri DMV exam.
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2025 Missouri | Frequently Asked Questions
To acquire a CDL Tank endorsement in Missouri, you need to pass the knowledge test specific to tank vehicles. You can prepare for the test using the Missouri CDL manual. Visit a local Missouri Driver License Office to take the test. Passing this test allows you to legally operate commercial vehicles designed to transport liquid or gaseous materials.
To obtain a CDL Tank license in Missouri, you must have a basic CDL license first. Then, you'll need to pass the Tank Vehicle endorsement test. This test covers the knowledge of tank vehicles, inspecting tank vehicles, driving tank vehicles, and safe driving rules. You may also need additional endorsements depending on the vehicle's specific requirements.
While Missouri doesn't explicitly require specific training or experience to get a CDL Tank endorsement, it's beneficial to have practical training. This helps in passing the Tank Vehicle endorsement test, which covers topics like inspecting tank vehicles and safe driving rules. Prior experience can also be useful but isn't mandatory.
Yes, in Missouri, to obtain a CDL Tank endorsement, you need to pass an additional written test called the Tank Vehicle endorsement test. This test covers the knowledge of tank vehicles, their inspection, and safe driving rules. Note that this is in addition to the general CDL written exam.
The written test for the CDL Tank endorsement in Missouri includes subjects such as the safe operation of tank vehicles, tank vehicle inspections, proper loading and unloading procedures, and the transportation of hazardous materials. Additionally, you may be tested on topics like emergency response and the use of emergency equipment specific to tank vehicles.
The CDL Tank endorsement written test in Missouri focuses on the knowledge rather than practical skills or maneuvers. It covers subjects like inspecting tank vehicles, recognizing high center of gravity, handling surge, driving tank vehicles, and safe driving rules and practices specific to tank vehicles. There's no separate skills or road test for the Tank endorsement.
In Missouri, drivers with a CDL Tank endorsement must adhere to specific regulations. For instance, they must always ensure the tank is not overloaded and the load is properly balanced. Additionally, they must follow safety protocols while loading and unloading. Violation of these guidelines can lead to endorsement revocation or legal penalties. Note that endorsements don't grant authority to transport hazardous materials unless you also have a Hazmat endorsement.
No, in Missouri, you cannot legally transport liquid or gas materials without a valid CDL Tank endorsement. This endorsement is required for drivers who operate commercial vehicles transporting liquids or gases in a tank or tanks having an individual rated capacity of more than 119 gallons and an aggregate rated capacity of 1,000 gallons or more. Violations can lead to serious penalties.
In Missouri, the CDL Tank endorsement can be added to your existing Commercial Driver's License. You don't need a fresh application for a new license. However, you must pass the Tank Vehicle written test. Once you pass the test, the endorsement will be added to your CDL, enabling you to legally transport liquid or gas materials.
Yes, to handle hazardous materials with a CDL Tank endorsement in Missouri, drivers must also have a Hazardous Materials (H) endorsement. This requires passing a written test on federal and state regulations for transporting hazardous materials. Additionally, drivers must undergo a federal background check and fingerprinting. Failure to comply with these regulations can result in severe penalties.
