Combination Vehicles Practice Test | Ohio 2025 #1

Train for FREE online with our Ohio 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 OH 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.

Number of Question 20

Passing Score 16

Number of Tests 20

1 . The best way to recognize that your trailer has started to skid is by:

Seeing other drivers' faces.

Checking the trailer in your mirrors.

Feeling the trailer move.

The easiest way to become aware that your trailer has begun to jackknife is to observe it in your mirrors. Checking your trailer in your mirrors will also allow you to spot any skidding at the earliest possible moment.

2 . If you cannot reverse your trailer in a straight path, you should:

Swerve back and forth while backing.

Back toward the driver's side.

Back toward the passenger's side.

If you need to back your trailer but cannot back up in a straight path, you should back on a curved path toward the driver's side of the vehicle. This will allow you the best possible visibility while backing.

3 . In an empty combination vehicle, the stiff suspension springs and strong brakes will have:

High traction.

Low traction.

No traction.

An empty combination vehicle will come to a complete stop more slowly than a fully-loaded vehicle. With less weight in a trailer, the stiff suspension springs and strong brakes will have lower traction than they would if the vehicle carried more weight.

4 . If a trailer begins to jackknife, the driver:

Should not apply the trailer hand brake.

Should firmly apply the brakes.

Can straighten the trailer with the parking brake.

If a trailer begins to jackknife, you should release the brakes and allow the trailer wheels to regain traction with the road. Do not apply the trailer hand brake to attempt to straighten out the rig because the application of brakes is what caused the wheels to lock in the first place.

5 . Place the trailer air supply control in its "emergency" position to test:

The trailer emergency brakes.

A coupling device.

The anti-lock brakes.

Be sure to test the trailer emergency brakes before beginning a trip. After ensuring that the trailer rolls freely, you can test the emergency brakes by pulling out the trailer air supply control, or placing it in the "emergency" position. Pull forward slightly with the tractor and make sure the trailer does not move.

6 . All trailers made after ____ must be equipped with Anti-Lock Braking Systems (ABS).

1943

1998

2009

All trailers and converter dollies manufactured on or after March 1, 1998 must have Anti-Lock Braking Systems (ABS).

7 . What is a bobtail tractor?

A tractor without a semi-trailer

A tractor with two semi-trailers

A tractor that travels faster than the speed limit

Tractors without semi-trailers are referred to as "bobtail tractors." Bobtail tractors are difficult to operate and drivers must exercise caution.

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2025 Ohio | Frequently Asked Questions

To acquire a CDL Hazmat endorsement in Ohio, first, you must hold a valid Ohio CDL. Then, pass the Hazmat knowledge test at your local BMV. You'll also need to undergo a TSA background check. Lastly, submit your application with the appropriate fees to the Ohio Bureau of Motor Vehicles (BMV). The endorsement will be added upon approval.

To obtain a CDL Hazmat license, you must have a valid Commercial Driver's License (CDL). You also need to pass the Hazardous Materials Endorsement Knowledge Test. A Transportation Security Administration (TSA) background check is required. Lastly, you must be at least 21 years old and be able to read and speak English adequately.

When applying for a CDL Hazmat endorsement in Ohio, you'll need your current Ohio CDL. You should also have proof of U.S. citizenship or legal status, such as a birth certificate, passport, or immigration documents. Additionally, you'll need to provide your Social Security number and complete a TSA security threat assessment application, which includes fingerprinting and a background check.

Yes, there is a dedicated written test for the CDL Hazmat endorsement. The Hazardous Materials Endorsement Knowledge Test is designed to evaluate your understanding of the rules and regulations of transporting hazardous materials. It covers topics such as loading and unloading, bulk packaging marking, driving and parking rules, and emergency response procedures.

The written test for the CDL Hazmat endorsement covers a variety of subjects related to hazardous materials. These include identifying different types of hazardous materials, understanding shipping papers, placarding rules, loading and unloading procedures, driving and parking rules, emergency response procedures, and how to handle hazardous materials safely and effectively.

Yes, there are additional charges associated with acquiring a CDL Hazmat endorsement in Ohio. These include fees for the knowledge test, endorsement application, fingerprinting, and background check. The exact amount may vary, so it's advised to check with the Ohio Bureau of Motor Vehicles or a local DMV office for current rates.

Yes, obtaining a CDL Hazmat endorsement requires a background check and security clearance. This is mandated by the Transportation Security Administration (TSA). The process includes fingerprinting and a check of criminal, immigration, and mental health records. The goal is to ensure that hazardous materials are transported safely and securely.

Yes, specialized training and certification are mandatory for a CDL Hazmat endorsement in Ohio. Applicants must pass a written knowledge test that covers hazardous materials regulations and safety procedures. Once you pass the test, the endorsement is added to your Commercial Driver's License. This ensures you are equipped with the necessary knowledge to handle hazardous materials.

No, you cannot legally transport hazardous materials without a valid CDL Hazmat endorsement in Ohio. The endorsement is required to ensure the driver understands the safety procedures and regulations related to transporting hazardous materials. Violating this can result in hefty fines, suspension of your CDL, or even imprisonment.

You can add a CDL Hazmat endorsement to your current CDL license without needing a new application. However, you must pass the Hazmat knowledge test and undergo a TSA background check. Once cleared, the Hazmat endorsement will be added to your existing CDL. Remember, your CDL must be valid and in good standing for this process.