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These 10 free DE-PEST questions are organized by exam domain, so you can see how each part of the Delaware Commercial Pesticide Applicator Core Exam blueprint is tested. Reveal the answer and explanation under each question.
A Delaware commercial applicator logs wind speed and air temperature for a product whose label advises precautions against drift. To complete the required on-site weather entries, what else must be recorded?
Correct answer: C - Wind direction and relative humidity
An applicator confirms a pest in ornamental turf, but the pest is not named on a pesticide's label. The product is registered in Delaware for that turf site, and the proposed use follows all labeled rates and precautions. The labeling does not limit use to listed pests, and no separate prohibition applies. What additional authorization is required solely because the pest is unlisted?
Correct answer: D - No additional authorization; the proposed treatment is an allowed unlisted-pest use on a labeled site.
A client describes a patch of narrow-leaved weeds as grass. Before accepting that identification, an applicator checks for a sedge. Which finding would most strongly support a sedge rather than a true grass?
Correct answer: D - A solid, triangular stem with leaves in three ranks
Weekly scouting in a nursery block finds a mean of six larvae per plant, up from three the previous week. The management plan uses a mean action threshold of five larvae per plant and an economic injury level of eight. Sampling methods are unchanged, and the larvae are susceptible to available controls. Which decision follows from these findings?
Correct answer: A - Begin appropriate control now, then resample to check its effectiveness.
A vegetable grower schedules crop scouting and harvesting three days after a pesticide application. The label specifies a 12-hour restricted-entry interval and a 7-day preharvest interval. The spray is dry, required worker notifications are complete, and no additional entry restrictions apply. How should these work orders be handled?
Correct answer: B - Allow scouting now, but delay harvesting until the preharvest interval ends.
Pesticide concentrate splashes into a loader's eye while contact lenses are in place. Clean running water is within reach, and a coworker is calling Poison Control. Which action should begin immediately?
Correct answer: A - Start gentle rinsing; remove the lenses after five minutes and continue rinsing for 15-20 minutes total.
A handler completes OSHA-accepted quantitative fit tests: the half-facepiece has an overall fit factor of 180, and the full-facepiece has an overall fit factor of 320. The label permits either respirator configuration with the specified cartridges; separate required eyewear is available for half-facepiece use. Medical clearance and training are current. Which interpretation supports equipment selection for this job?
Correct answer: C - The half-facepiece passed its 100 minimum; the full-facepiece failed its 500 minimum.
A wettable-powder spray mixture gradually separates in the tank while boom pressure and individual nozzle flow rates remain normal. Undissolved solids collect at the bottom. Which component should be checked first?
Correct answer: D - The tank agitation system
For a banded herbicide application, a 12-acre planted block has 36-inch row spacing and an 18-inch treatment band over each row. The label rate is 2 pints of formulated product per acre actually treated. What quantity of product is needed to treat every row in the block?
Correct answer: B - 12 pints
Four potential treatment sites have the same depth to groundwater and will receive similar rainfall. Product water solubility and application rate are comparable. Which soil-pesticide combination presents the greatest concern for groundwater contamination by leaching?
Correct answer: B - Sandy soil, low organic matter; weak adsorption and long pesticide persistence.
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