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

Select the true statement:

2 / 40

What should you hear when you have the hand valve on and are testing the trailer brakes by opening the service air line at the back of the trailer?

3 / 40

Select the true statement about baffled tankers:

4 / 40

A tank trailer should never be fully loaded due to:

5 / 40

How do you supply air to the trailer tanks?

6 / 40

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

7 / 40

How do you determine if slack adjusters need to be adjusted?

8 / 40

Suspension systems:

9 / 40

A commercial motor vehicle (CMV) is defined as:

10 / 40

What is the standee line?

11 / 40

What is the value of the overhead rear-view mirror inside of the bus?

12 / 40

What is the most important reason for doing a school bus inspection?

13 / 40

You should adjust all the outside left and right side flat mirrors to see:

14 / 40

A portable tank differs from a cargo tank in that ______.

15 / 40

Remember to_____to prevent rollovers.

16 / 40

What are you checking when looking at the lubrication level on a dipstick?

17 / 40

Select the answer that is not a part of the braking process when driving a tractor-trailer combination vehicle that has ABS:

18 / 40

The Emergency Response Guidebook (ERG):

19 / 40

Select how brakes work on long, steep downgrades:

20 / 40

Your engine runs a pump when you are delivering compressed gas. Should you turn off your engine before or after you unhook the hoses after finishing that delivery?

21 / 40

What does the amount of liquid you can carry depend on?

22 / 40

What are the three hazard classes should NOT be loaded into a trailer that has a heater air conditioner unit?

23 / 40

What are the three types of emergency equipment that you must have with your vehicle?

24 / 40

Most states require school bus drivers to take a physical examination:

25 / 40

Select the statement that best explains the "crack-the-whip" effect.

26 / 40

What handling effect will baffles have?

27 / 40

This item should not be rusted, bent, or damaged and centered over evenly spaced tires and dual wheels.

28 / 40

Which of the following should you do when driving the school bus in high wind?

29 / 40

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

30 / 40

Select the step that comes first:

31 / 40

If you are already carrying 100 pounds of silver cyanide, what precautions must you take if you are given papers at a dock to carry 100 cartons of battery acid?

32 / 40

What is a technical name?

33 / 40

You should___when driving down a long steep hill.

34 / 40

The bolst, brackets, or bushings that attach the air bag and/or spring to the vehicle and axle frame are _____.

35 / 40

When stopped on a divided highway where should your reflectors be placed?

36 / 40

What are the liquid tight separations between compartments inside tanks called?

37 / 40

This object releases the fifth wheel locking jaw to allow uncoupling.

38 / 40

How often should you drain your air tanks?

39 / 40

Which of the following are some suspension system defects?

40 / 40

With Division 1.1, 1.2, or 1.3 Class A or B, how close can you park to a bridge, tunnel, or building?

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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.