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Delaware Pesticide License Practice Test (Free Core Exam Questions)

Preparing for the Delaware pesticide applicator exam? In Delaware, applicator certification and licensing are handled by the state pesticide regulatory agency, generally the Delaware Department of Agriculture. Like every state, Delaware requires applicators to show competency in the core (general standards) areas set out in federal rules: label comprehension, safety, environmental protection, pests, pesticides, equipment, application methods, laws, supervision, and professionalism. Most candidates also take a state laws section and one or more category exams.

Confirm current exam requirements, manuals, fees, and testing locations directly with the Delaware Department of Agriculture. This site is unofficial and not affiliated with any Delaware agency.

10 free Delaware core exam practice questions

1. Pesticide tolerances (maximum legal residue levels on food) are set by:

Answer: C. The EPA sets tolerances. FDA and USDA monitor and enforce residue limits in food.

2. Use-specific instructions given to a noncertified applicator should include:

Answer: D. The supervisor must give instructions specific to the product and site, including label directions and precautions.

3. Product stewardship includes:

Answer: D. Stewardship means responsible handling from purchase through disposal to protect people and the environment.

4. A rectangular lawn is 100 feet by 250 feet. What is its area?

Answer: D. 100 x 250 = 25,000 square feet (about 0.57 acre).

5. Using a pesticide in a manner inconsistent with its labeling is:

Answer: C. FIFRA makes it unlawful to use a registered pesticide in a manner inconsistent with its labeling.

6. Chronic toxicity refers to effects from:

Answer: D. Acute effects come from a single exposure. Chronic effects come from repeated exposures over time.

7. A back-siphoning incident can contaminate a water source when:

Answer: D. Keep an air gap between the hose and the tank's liquid surface, or use an anti-backflow device, so mix can't be drawn back into the water source.

8. Quarantines that prevent movement of infested materials are:

Answer: B. Government-mandated quarantines and eradication programs are regulatory pest control.

9. Persistence refers to:

Answer: B. Persistent pesticides remain active longer. That can give residual control but raises carryover, leaching, and residue concerns.

10. Calibration is the process of:

Answer: A. Calibration confirms the equipment delivers the labeled rate over the intended area.
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How to study for the Delaware core exam

  1. Get the core manual edition your state uses (many states are moving to the 2025 3rd edition national core manual during 2026) and any Delaware law supplement.
  2. Take a timed practice test to find your weak areas.
  3. Re-read those chapters, then retest until you're consistently above passing.
  4. Memorize the high-yield facts: signal words, first aid, PPE rules, drift and inversions, and basic calibration math.

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