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Ohio Pesticide License Practice Test (Free Core Exam Questions)

Preparing for the Ohio pesticide applicator exam? In Ohio, applicator certification and licensing are handled by the state pesticide regulatory agency, generally the Ohio Department of Agriculture. Like every state, Ohio requires applicators to show competency in the core (general standards) areas set out in federal rules: label comprehension, safety, environmental protection, pests, pesticides, equipment, application methods, laws, supervision, and professionalism. Most candidates also take a state laws section and one or more category exams.

Confirm current exam requirements, manuals, fees, and testing locations directly with the Ohio Department of Agriculture. This site is unofficial and not affiliated with any Ohio agency.

10 free Ohio core exam practice questions

1. If a pesticide gets in someone's eyes, first aid usually calls for rinsing the eye with clean running water for at least:

Answer: B. Hold the eye open and flush gently with clean water for at least 15 minutes, then get medical help, following the label's first aid statement.

2. To reduce risk to honey bees, an applicator should generally:

Answer: A. Bee-toxic products should not reach flowering plants while bees are active. Labels may carry specific pollinator protection language.

3. Rotating crops, adjusting planting dates, and sanitation are examples of:

Answer: C. Cultural practices change the environment to make it less favorable to pests.

4. An adjuvant that helps a spray spread out and wet a waxy leaf surface is a:

Answer: D. Surfactants reduce surface tension so droplets spread and contact the leaf surface better.

5. Strainers and screens in a sprayer:

Answer: D. Filters protect the pump and nozzles from particles and help keep output uniform.

6. Which of the following is generally permitted under FIFRA even if not specifically listed on the label?

Answer: B. FIFRA allows certain deviations, such as lower rates, less frequent application, or any method not prohibited, as long as the labeling doesn't prohibit them.

7. Which agency requires Safety Data Sheets and hazard communication for employees who work with hazardous chemicals, including many pesticides?

Answer: C. OSHA's Hazard Communication Standard requires SDSs and employee training on hazardous chemicals.

8. Noncertified applicators should have access to the product labeling:

Answer: A. Labeling must be available so the applicator can follow directions and precautions during use.

9. Restricted-use pesticides should be stored:

Answer: C. Chemical security means preventing theft and misuse through locked storage, inventory control, and limited access.

10. How many fluid ounces are in one U.S. gallon?

Answer: C. 1 gallon = 128 fluid ounces = 4 quarts = 8 pints.
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How to study for the Ohio core exam

  1. Get the core manual edition your state uses (many states are moving to the 2025 3rd edition national core manual during 2026) and any Ohio law supplement.
  2. Take a timed practice test to find your weak areas.
  3. Re-read those chapters, then retest until you're consistently above passing.
  4. Memorize the high-yield facts: signal words, first aid, PPE rules, drift and inversions, and basic calibration math.

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