Combination #1
Combination Vehicles Practice Test | Indiana 2025 #1 Page 3 of 3
Train for FREE online with our Indiana 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 IN 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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15 . What is a tractor protection valve?
A valve that prevents the trailer from accidentally being released
In a combination vehicle with air brakes, the tractor protection valve keeps air in the tractor or truck brake system in the event of the trailer breaking away or developing a leak.
16 . What happens when the wheels of a trailer lock up?
The trailer will stop.
A trailer tends to swing around, potentially resulting in a trailer jackknife, if its wheels lock up.
17 . What is another name for the service line?
The power line
The trailer service air line is also referred to as the control line or signal line.
18 . Which of the following types of vehicles is most prone to the “crack-the-whip" effect?
A triple combination
Double and triple combinations are the most vulnerable to turning over as a result of the "crack-the-whip" effect.
19 . After finishing a pre-trip inspection, you should:
Leave the emergency line valve open.
Before a trip, you should ensure that air reaches all air brakes on all trailers by opening up the rear emergency line and service line shut-off valves to listen for escaping air. Close both shut-off valves before beginning to drive.
20 . If you are operating a vehicle built before 1998 and are unsure if the trailer has an Anti-Lock Braking System (ABS), you can:
Assume the vehicle has ABS.
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.
2025 Indiana | Frequently Asked Questions
To acquire a CDL Tank endorsement in Indiana, you must first have a Commercial Driver's License (CDL). Next, study the Indiana CDL handbook section on tank vehicles. Then, schedule and pass the Tank Vehicle Endorsement Knowledge Test at a BMV branch. Lastly, pay the required fee to add the endorsement to your license.
To obtain a CDL Tank license, it's essential to have a valid Commercial Driver's License (CDL). You must also pass the Tank Vehicle Endorsement Knowledge Test, which covers the special driving rules and techniques for tank vehicles. Studying the relevant section in the Indiana CDL manual can help prepare for this test.
While specific training isn't mandatory for a CDL Tank endorsement in Indiana, it's highly recommended. Having a solid understanding of the Indiana CDL handbook section on tank vehicles is crucial. Prior experience isn't required, but practicing with a professional driver or attending a driving school can increase your chances of passing the endorsement test.
Yes, in Indiana, to obtain a CDL Tank endorsement, you are required to pass the Tank Vehicle Endorsement Knowledge Test. This test is in addition to the general CDL knowledge and skills tests. Studying the tank vehicle section of the Indiana CDL handbook is crucial to pass this written test.
The written test for the CDL Tank endorsement in Indiana includes subjects like inspecting tank vehicles, driving tank vehicles, and safe driving rules specific to tank vehicles. It also covers the effects of liquid surge on vehicle handling, and knowledge about bulkheads and baffles. Studying these topics will help you pass the test.
The CDL Tank endorsement assessment in Indiana primarily focuses on knowledge rather than specific driving maneuvers. It tests your understanding of inspecting tank vehicles, driving them safely, handling liquid surge, and the function of bulkheads and baffles. However, the general CDL skills test will assess your actual driving abilities.
Yes, drivers with a CDL Tank endorsement must adhere to certain regulations. They must pass regular drug and alcohol tests, maintain a clean driving record, and follow hours-of-service regulations. Additionally, they must comply with special procedures for loading and unloading cargo, and avoid certain routes, like roads with low bridges or tunnels, due to the vehicle's size.
No, drivers cannot legally transport liquid or gas materials without a valid CDL Tank endorsement in Indiana. This endorsement is specifically required for operating a tank vehicle, which is defined as any commercial motor vehicle designed to transport any liquid or gaseous materials within a tank either permanently or temporarily attached to the vehicle.
Yes, the CDL Tank endorsement can be added to your current license. A fresh application isn't necessary. You need to pass the Indiana CDL Tank Vehicle written test, and once you do, the endorsement will be added to your existing CDL. Remember, there may be additional fees for adding endorsements.
Yes, there are specific regulations and prerequisites in place for handling hazardous materials with a CDL Tank endorsement in Indiana. These include passing a written test, undergoing a background check, obtaining a Transportation Security Administration (TSA) clearance, and completing specialized training on the safe handling and transportation of hazardous materials. Compliance with federal regulations, such as those outlined in the Hazardous Materials Regulations (HMR), is also required.