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.
See the exact questions that will be on the 2025 Indiana DMV exam.
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2025 Indiana | Frequently Asked Questions
In Indiana, a Commercial Driver's License (CDL) Class B allows you to operate single vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more or any such vehicle towing another not exceeding 10,000 pounds. It includes buses, farm labor vehicles, and any combination of vehicles that are not Class A vehicles.
A Class B Commercial Driver's License (CDL) in Indiana allows you to operate single vehicles with a Gross Vehicle Weight Rating (GVWR) of 26,001 pounds or more, or any such vehicle towing another not in excess of 10,000 pounds. This typically includes straight trucks, large buses, segmented buses, and dump trucks with small trailers.
To acquire a Class B CDL license in Indiana, you must be at least 18 years old (21 for interstate driving), possess a valid Indiana driver's license, pass a vision test, and obtain a medical clearance. You'll also need to pass written knowledge tests and a skills test, which includes a pre-trip vehicle inspection, a basic controls test, and an on-road driving exam.
In Indiana, you must be at least 18 years old to qualify for a Class B Commercial Driver's License (CDL) for intrastate driving (within Indiana only). However, you must be at least 21 years old to drive a commercial vehicle across state lines, carry hazardous materials, or transport passengers.
While not always necessary, specific endorsements may be required for certain jobs with a Class B CDL license in Indiana. These could include passenger, school bus, tanker, or hazardous materials endorsements. Each endorsement requires additional knowledge tests, and in some cases, a skills test. It's best to determine your job requirements before applying for endorsements.
The Class B CDL skills assessment in Indiana includes three parts: a pre-trip vehicle inspection to check if the driver can determine if the vehicle is safe to drive, a basic vehicle control test to assess the driver's ability to control the vehicle, and an on-road driving test to evaluate the driver's performance in real-world traffic situations.
Yes, there are some limitations for Class B CDL license holders. In Indiana, a Class B license allows you to operate single vehicles with a Gross Vehicle Weight Rating (GVWR) of 26,001 pounds or more, or a towed vehicle not exceeding 10,000 pounds GVWR. You can't operate vehicles that require a Class A license without the appropriate endorsements.
Yes, in Indiana, the written Class B CDL test is available in multiple languages. However, federal regulations require that all CDL holders must be able to read and speak English well enough to converse with the general public, understand highway traffic signs and signals, respond to official inquiries, and make entries on reports and records.
Yes, you can request accommodations for the Class B CDL written exam in Indiana due to disability. The Bureau of Motor Vehicles (BMV) is committed to ensuring that its services are accessible to all individuals. You should contact the BMV directly to discuss your specific needs and the types of accommodations available.
If you don't pass the Class B CDL written test in Indiana, you can retake it. However, you must wait until the next business day to do so. Keep in mind that there may be additional fees for each retake. It's also recommended to review your study materials thoroughly before attempting the test again.
