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These 10 free OH-PEST questions are organized by exam domain, so you can see how each part of the Ohio Commercial Pesticide Applicator Core Exam blueprint is tested. Reveal the answer and explanation under each question.
A pesticide label states: "Apply 1 to 2 pints per acre per application; do not exceed 4 pints per acre per year; make no more than 3 applications per year; allow at least 14 days between applications." A field received 1.5 pints per acre on May 1 and 1.25 pints per acre on May 16. On June 1, all other label conditions are met. What is the greatest legal rate for a third application?
Correct answer: B - 1.25 pints per acre
A herbicide label says, "Do not apply when wind speed exceeds 10 mph" and, "For best results, treat weeds 4 inches tall or less." At the planned site, wind is steady at 6 mph away from sensitive areas, no inversion is present, and the target weeds are 6 inches tall. All other mandatory directions are satisfied. How should the applicator interpret the label?
Correct answer: D - The application is permitted, but control may be less reliable on the larger weeds
Two insecticides have similar brand names and the same active ingredient, but their directions for use differ. Before matching a container to the application record and approved directions, which identifier must the applicator compare?
Correct answer: A - The EPA Registration Number
While loading an insecticide, a worker develops pinpoint pupils, profuse salivation, muscle twitching, and marked difficulty breathing. A splash on the worker's clothing is still wet. What is the best immediate response?
Correct answer: C - Call 911, prevent further exposure, begin label-directed decontamination, and send the product label with the worker
A handler completed the annual fit test six months ago for one make and model of tight-fitting respirator. The employer now assigns a different facepiece model; the handler's medical evaluation remains current. What additional requirement is triggered by the facepiece change?
Correct answer: C - Complete a fit test with the new facepiece before required use
Two crews handle the same pesticide concentrate at the same labeled rate. Crew 1 pours from open containers; Crew 2 uses a closed transfer system and the same required PPE. Which statement accurately compares their risk?
Correct answer: A - Crew 2 has lower exposure and therefore lower risk, while the pesticide's inherent toxicity is unchanged
At sunrise, a wind meter reads 1 mph. Smoke from a test source hangs in a horizontal layer, and a sensitive orchard lies downwind. The label prohibits application during a temperature inversion. The applicator is using a fine spray. The sound decision is to:
Correct answer: D - Postpone until the inversion dissipates and all label conditions are met
A ground-boom application in outdoor agricultural production uses medium droplets released 18 inches above the planting medium. It is not air blast, fog, fumigant, or aerial application. A bicyclist enters a public easement 20 feet from the discharge point. Under the Worker Protection Standard, the handler must:
Correct answer: B - Suspend immediately; the person is inside the 25-foot AEZ
An IPM plan sets an action threshold at 12 larvae per plant and an economic injury level at 20. This week's representative counts average 9 larvae per plant, the population has been stable, and no health, quarantine, or zero-tolerance rule applies. What should the manager do now?
Correct answer: A - Continue monitoring and preventive controls; treatment is not yet triggered
Yellowing and leaf curl appear on one row of shrubs after fertilizer was applied on-site and an herbicide was sprayed next door. No insects or pathogen signs are visible, and an untreated row is normal. Before choosing a pesticide, what is the most defensible next move?
Correct answer: C - Document the pattern and timing, then obtain enough diagnostic evidence to identify the cause
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