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.

Checking the trailer in your mirrors.

Backing a truck is always dangerous because the driver may not be able to see everything behind them. CMV operators should avoid backing whenever possible.

It is difficult to see behind the vehicle.

Most trucks do not have the ability to move in reverse.

Cargo may fall out of the trailer.

In an air brake system, a low air pressure warning signal must come on if air pressure in the tanks falls below 60 psi. This warning signal may come in the form of a light, a buzzer, or a wig wag.

When tank pressure falls below 60 psi.

When tank pressure falls below 120 psi.

When tank pressure falls below 60 psi.

When tank pressure falls below 10 psi.

When tank pressure falls below 5 psi.

An Anti-Lock Braking System (ABS) helps prevent wheel lockup during hard braking. If ABS detects impending lockup, it reduces braking pressure to a safe level.

It prevents a vehicle's wheels from locking up.

It allows a vehicle's wheels to lock up.

It prevents a vehicle's wheels from locking up.

It makes turning a vehicle easier.

Double Triple Test | Ohio 2025 #1 Page 3 of 3

Train for FREE with our Ohio 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 OH CDL double triple 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 may vary from state to state.

Number of Question 20

Passing Score 16

Number of Tests 20

Double Triple Test | Ohio 2025 #1 Page 3 of 3

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

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

17 . Backing with a trailer is dangerous because:

18 . A low air pressure warning signal should activate:

19 . As part of the vehicle inspection test, a CDL applicant may be asked to:

20 . What does an Anti-Lock Braking System (ABS) do?

See the exact questions that will be on the 2025 DMV exam.

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