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These 10 free AR-PEST questions are organized by exam domain, so you can see how each part of the Arkansas Commercial Pesticide Applicator Basic Core Exam blueprint is tested. Reveal the answer and explanation under each question.
Separate crews are scheduled to hand-weed and harvest a treated crop. The pesticide label specifies a 24-hour restricted-entry interval and a 7-day preharvest interval. Three full days have passed since application, the spray is dry, and no other entry restrictions apply. What instructions should the supervisor give the crews?
Correct answer: B - Permit hand-weeding, but wait for the preharvest interval before harvesting.
An Extension specialist confirms that an insecticide can control an identified pest on a crop listed on its label. The pest itself is not listed. The label neither limits use to named pests nor prohibits this target, and the proposed rate, method, and timing comply with all directions. No stricter state restriction applies. Under FIFRA section 2(ee), how should the unlisted pest be handled?
Correct answer: D - Proceed with the otherwise compliant use; the unlisted pest alone does not prohibit it.
A pesticide splashes behind a handler's goggles and into one eye. She is wearing contact lenses, and a coworker has clean running water immediately available. Another coworker is retrieving the container and contacting Poison Control. What should happen at the water station without delay?
Correct answer: C - Start gently rinsing the eye with clean water while holding the eyelids open.
A pesticide formulation has an acute oral LD50 of 6,400 mg/kg and an acute dermal LD50 of 5,800 mg/kg. Its inhalation result is Category IV, and its skin-irritation result is Category III. Eye testing, however, shows irreversible tissue damage. Which labeling requirement follows from these results?
Correct answer: C - DANGER, without a POISON requirement based solely on the eye damage.
The label permits spraying in winds of 3-10 mph and prohibits temperature inversions. At dawn, wind is 5 mph, but air temperature is 64 degrees F near the soil and 73 degrees F at 10 feet. Smoke hangs in a horizontal layer near the ground. The applicator should:
Correct answer: A - Postpone spraying until field observations confirm that the inversion has dissipated.
Wilting appears in a narrow strip of a crop field served by one irrigation lateral. Adjacent rows remain turgid. Soil in the affected strip is unusually dry, roots are firm without discoloration, and scouting finds no feeding injury. Before selecting a pesticide, the applicator should investigate:
Correct answer: A - Whether irrigation flow is inadequate along that lateral.
"We rotate products every season," an applicator says, pointing to two herbicide brands with the same active ingredient. Which replacement represents a genuine mode-of-action rotation rather than another brand or formulation change?
Correct answer: C - A locally effective herbicide that acts on a different biological target.
A treatment calls for 8 pounds of a 50%-by-weight wettable powder. The supplier instead has an 80%-by-weight water-dispersible granule containing the same active ingredient. Both labels authorize the crop, target, method, and intended active-ingredient rate. How much of the 80% product supplies the prescribed amount of active ingredient?
Correct answer: B - 5.0 pounds
During a clean-water check, every nozzle on a boom delivers 0.46 gallon per minute at the specified test pressure. The manufacturer lists 0.40 gallon per minute for a new nozzle and an acceptable range of 0.36-0.44. The pressure gauge has been verified. The operator considers the nozzles acceptable because their outputs match. Which conclusion is justified?
Correct answer: D - The nozzles are uniformly outside specification despite their matching outputs.
An Arkansas commercial applicator has two years remaining on certification in the category needed for a scheduled agricultural application. The individual commercial applicator license expired last week, although the employer's business license remains current. What must the applicator address before performing the for-hire work?
Correct answer: A - Obtain a current individual commercial applicator license before applying for hire.
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