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The IL-PEST exam has 100 questions and runs 3 hours.
These 10 free IL-PEST questions are organized by exam domain, so you can see how each part of the Illinois Commercial Pesticide Applicator General Standards Exam blueprint is tested. Reveal the answer and explanation under each question.
A soybean label states, "Restricted-entry interval: 12 hours; preharvest interval: 30 days." An application ends at 6:00 a.m. on June 1. A trained worker with no early-entry exception needs to scout at 8:00 p.m. that day, and harvest is planned for June 20. Which interpretation is correct?
Correct answer: C - Scouting may begin after 6:00 p.m. June 1, but the June 20 harvest is too early
An herbicide's federally registered labeling lists a corn field as an approved site but does not name a newly identified weed. The labeling does not limit use to listed pests or prohibit the proposed application method. The applicator will stay below the labeled rate, follow every restriction, and no additional state prohibition applies. Under FIFRA Section 2(ee), which conclusion is best?
Correct answer: A - The use may be allowed under 2(ee) because the site is labeled
A pesticide has an acute oral LD50 of 900 mg/kg, an acute dermal LD50 of 5,500 mg/kg, and causes irreversible corneal injury. No oral, dermal, or inhalation lethality endpoint falls in Category I. What signal-word presentation is expected from the most severe acute endpoint?
Correct answer: D - DANGER without the POISON designation
Minutes after loading an insecticide, a worker develops heavy salivation and tearing, pinpoint pupils, abdominal cramps, diarrhea, muscle twitching, and trouble breathing. What is the best immediate response?
Correct answer: B - Activate 911, stop exposure, decontaminate safely, and send the product label
A handler splashes pesticide concentrate into one eye while wearing contact lenses. The product label's first-aid section gives the standard eye-rinse procedure. What should the handler do first?
Correct answer: A - Rinse immediately for 15 to 20 minutes; remove the lens after 5 minutes
A label requires protection from an oil-containing pesticide mist and an organic vapor. A worker proposes a P100 filtering facepiece with no vapor cartridge because "P100 filters 99.97%." What is the critical flaw?
Correct answer: C - P100 addresses particles; organic vapor requires the label-specified cartridge or canister
A grounds department is redesigning pesticide storage in a farm shop that is occasionally visited by employees' children. Which arrangement provides the strongest routine protection against accidental exposure?
Correct answer: B - Locked storage, original containers, liquids below dry products, and separation from feed
A volatile herbicide was applied with coarse droplets while wind carried spray away from a neighboring crop. Several hours later, temperatures rose and the wind shifted toward that crop; no rain occurred. Injury later appeared along the crop's near edge. Which pathway most plausibly explains the pattern?
Correct answer: D - Vapor drift after the application
A soil-applied pesticide has a 10-day half-life under the stated conditions, and its label requires a 45-day plant-back interval for sweet corn. Thirty days after treatment, a manager estimates residue decline before deciding whether to plant. How should the manager proceed?
Correct answer: C - About 12.5% remains, but planting must wait another 15 days
At sunrise, smoke released for a weather check spreads sideways in a thin layer instead of rising and dispersing. Wind at boom height is nearly calm. How should a ground applicator interpret these observations?
Correct answer: B - Likely inversion; wait until smoke rises and vertical mixing returns
The IL-PEST exam also covers these domains. Drill them in the full free practice test:
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