CDL Practice Test


Use this site as you prepare to take the Ohio CDL test. You can work through these practice test questions as you prepare for the Ohio CDL Test. The questions on these practice tests will gauge your knowledge on the various areas that apply to obtain a CDL in Ohio. This site is completely free and you are welcome to take the practice tests as many times as you would like. You will be presented with 40 questions and you must answer 34 questions correctly to pass. There is a 50-minute time limit. You may not go back once you answer a question. Click the "Start Test" button below to begin.

1 / 40

Alcohol evaporators in some air brake systems help to:

2 / 40

A commercial motor vehicle (CMV) is defined as:

3 / 40

You should turn off your engine when loading flammable liquid unless:

4 / 40

Why should you test the tractor protection valve?

5 / 40

What type fire extinguisher is required in the power unit of a placarded vehicle?

6 / 40

You should follow the posted speed limits for curves and be aware of:

7 / 40

Who is responsible for packaging, labeling, and preparing the hazardous material shipping papers for a common carrier?

8 / 40

The minimum tread depth for tires other than the front tires is ____.

9 / 40

You should_____when checking the slack adjusters on S-Cam brakes.

10 / 40

The two other places where the hazardous identification number must appear are:

11 / 40

What should you hear when you test the trailer brakes by opening the service air line at rear of trailer with the hand valve on?

12 / 40

For Division 1.1 or 1.2 Explosives A, should the floor liner required be stainless steel?

13 / 40

Remember to_____to prevent rollovers.

14 / 40

How do you release the dolly brakes when coupling twin trailers?

15 / 40

How often should air tanks be drained?

16 / 40

Select the first action to do when the low air pressure warning comes on:

17 / 40

What does the drain valve for air tanks remove?

18 / 40

Your vehicle is going down a long hill and your brakes begin to fail. What should you do?

19 / 40

What do you check when doing a visual inspection of the coupling?

20 / 40

Your vehicle is going down a long hill and your brakes begin to fail. What should you do?

21 / 40

Select the true statement in regards to driving a truck with triple or double trailers:

22 / 40

The trailer height is correct for connecting a converter dolly to a second or third trailer when:

23 / 40

Which of the following is something the driver must watch for:

24 / 40

It is important to know the outage required for the liquids you carry because:

25 / 40

The interlock system for the brake and accelerator on a transit coach may be used:

26 / 40

To inspect the______you should pump the pedal 3 times and hold it down for 5 seconds while making sure the pedal doesn't move during those 5 seconds.

27 / 40

When using turn signals, which of the following should be avoided?

28 / 40

An air system that is fully charged will typically have ___ psi of pressure.

29 / 40

Liquid surge affects the handling of a tanker by:

30 / 40

What gauge on the dashboard indicates electrical system charging rate?

31 / 40

Select the true statement in regards to a converter dolly:

32 / 40

Start by___when coupling.

33 / 40

The pintle hook should be_____ and the converter dolly air tank drain valve is___when doing a walk around inspection of a triple or double trailer.

34 / 40

A trailer is at the right height to have the tractor backed up to it when:

35 / 40

Is it important to look into the back of the fifth wheel to see if the lockpin is locked in?

36 / 40

Which of the following is NOT something you need to know in order to determine if you need to use placards?

37 / 40

Select the statement that is true in regards to quick steering movements and triple/double trailers:

38 / 40

What do yo need to do before supplying air to the air tanks of the second trailer?

39 / 40

An example of a low pressure warning signal for air brakes is:

40 / 40

The main reason you should pull the dolly out from under a trailer before disconnecting it from the trailer in front is:

Your score is

The average score is 82%

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CDL Category Practice Tests

CDL Practice Test

How To Get A ohio Commercial Drivers License

To be eligible for a CDL in Ohio, applicants must meet the following age eligibility requirements.

  • Be at least 18 years old to operate a commercial vehicle intrastate (within Ohio only).
  • Be at least 21 years old to operate a commercial vehicle interstate (outside of Ohio).

Ohio CDL applicants must be medically certified that they are medically capable of operating a commercial vehicle and pass a vision test. Ohio applicants must get assistance with completing the forms from a CDL-certified doctor.

Applicants are required to submit the following documents.

  • Medical Examiner’s Certificate
  • (Form 649-F) Medical Examination Report for Commercial Driver Fitness Determination

Drivers who have had their licenses revoked, suspended, denied or canceled are not eligible for a CDL in Ohio. Applicants can be disqualified for having multiple licenses.

Ohio CDL Endorsements
H – Hazmat Vehicles
N – Tank Vehicles
P – Passenger Vehicles
S – School Bus
T – Double or Triple Trailer
X – Combination Tank Vehicles and Hazmat Vehicles

Hit the Open Road

ohio CDL License Test Tips

All Ohio CDL applicants must pass the general knowledge test prior to taking the skills test. This test consists of 50 questions. To pass the Ohio test, applicants must score 80 percent or higher. Applicants who require additional endorsements must pass additional tests and pay the required fees. The Ohio skills test can be taken 14 days after applicants pass the knowledge test. It includes a pre-trip vehicle inspection, basic control skills and on-road driving. Applicants must pass each section.

Military veterans and active military members can apply to have the skills exam waived if they meet the requirements. To qualify for a waiver, applicants must:

  • Be active duty military personnel.
  • Operate a commercial vehicle as part of their military duties.
  • Have been honorably discharged from the military within the past 12 months.
  • Submit an Application for CDL Skills Test Waiver.

Additional Information

Information on the Ohio Bureau of Motor Vehicles

The Ohio Department of Public Safety Bureau of Motor Vehicles oversees CDL license requirements in Ohio. To get more information contact them via:

Website: https://www.bmv.ohio.gov/dl-cdl-testing.aspx

Phone: 844.644.6268


Additional Ohio CDL Helpful Links

Please use the links below to access more valuable Ohio CDL testing resources and to learn more about practice driving tests for the state of Ohio.