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These 10 free SC-PEST questions are organized by exam domain, so you can see how each part of the South Carolina Commercial Pesticide Applicator Core Exam blueprint is tested. Reveal the answer and explanation under each question.
A crop insecticide label states: "Apply only 1.0 to 1.5 pints per treated acre. Do not exceed 3.0 pints per treated acre per year. PHI: 7 days. For best results, apply before 10 a.m." The site received 1.5 pints per treated acre in May and 1.0 pint in June. A third treatment is proposed at 1.0 pint on July 1, with harvest on July 12. What is the compliant decision?
Correct answer: C - Do not make another application of this product this year
A pesticide is labeled for use on golf-course turf against mole crickets and chinch bugs. Fire ants are correctly identified on the same turf. The label does not restrict control to listed pests, does not prohibit fire-ant treatment, and no more restrictive state rule applies. All rate, method, PPE, and environmental directions can be met. How should the proposed use be classified?
Correct answer: A - Potentially lawful as an unlabeled-target use on a labeled site
The container directions say, "For best results, apply in early morning. Do not apply when wind exceeds 10 mph. Before use, obtain and follow the current county-and-month Endangered Species Protection Bulletin." At 2 p.m. the wind is 8 mph, and the bulletin requires a 100-foot buffer. Which interpretation is correct?
Correct answer: D - Early morning is advisory; the wind cap and bulletin are mandatory
Acute testing for a pesticide product gives an oral LD50 of 900 mg/kg, a dermal LD50 of 6,000 mg/kg, and an inhalation LC50 of 0.15 mg/L. No eye or skin endpoint is more severe. What front-panel hazard marking is required?
Correct answer: B - DANGER, red POISON, and the skull-and-crossbones
While mixing an insecticide, an applicator develops pinpoint pupils, profuse salivation, wheezing, diarrhea, muscle twitching, and confusion. A coworker has the product label and can approach without entering the contaminated area. What should the coworker do first?
Correct answer: A - Call 911, prevent further exposure, and give responders the label
After an hour in chemical-resistant coveralls, a worker is sweating heavily, pale and clammy, dizzy, cramping, fully oriented, and able to drink. There is no known pesticide spill, and symptoms begin improving in the shade. The best immediate management is to:
Correct answer: C - Stop work, remove PPE safely, cool, hydrate, and monitor
At sunrise, a smoke plume from the edge of a field remains in a flat layer and drifts sideways instead of rising. Surface wind is light and within the product's numeric wind range. The label prohibits application during a temperature inversion. What condition controls the decision?
Correct answer: B - A temperature inversion; postpone until vertical mixing returns
Two sites receive the same pesticide. Site 1 has sandy soil, low organic matter, a shallow water table, and a highly soluble, weakly adsorbed product. Site 2 has compacted clay on a steep, saturated slope just before heavy rain. Which pairing identifies the dominant water-movement risk?
Correct answer: D - Site 1 - downward leaching; Site 2 - surface runoff
Scouting finds six larvae per plant. The established action threshold is ten larvae per plant, damage is stable, beneficial predators are increasing, and no quarantine or zero-tolerance rule applies. The most defensible IPM decision is to:
Correct answer: A - Continue monitoring and preserve the beneficial predators
A jar test made with the planned carrier, ratios, and mixing order remains uniform with no heat, gas, clumps, or separation. One product's label, however, states, "Do not tank mix with emulsifiable concentrates," and the partner is an EC. What follows?
Correct answer: D - The tank mix is prohibited despite physical compatibility
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