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Exam (elaborations)

Oregon Category E Aquatic Pest Control Exam Questions and Correct Answers

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This Oregon Category E Aquatic Pest Control exam preparation guide provides structured practice questions and verified answers focused on the management of pests in aquatic environments. It covers aquatic weed identification, algae control, pesticide selection and application in water systems, label restrictions, environmental protection, water quality considerations, non-target species protection, drift prevention, and compliance with Oregon pesticide regulations. Designed for pesticide applicators working in lakes, ponds, irrigation systems, and other aquatic environments seeking Category E certification.

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OREGON CATEGORY E AQUATIC PEST CONTROL ETI
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OREGON CATEGORY E AQUATIC PEST CONTROL ETI

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OREGON CATEGORY E AQUATIC PEST CONTROL
EXAM QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) Q&A 2027 INSTANT
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1. What is the primary goal of aquatic pest control?
A. Eliminate all aquatic life
B. Maintain ecosystem balance while managing pests
C. Increase chemical concentration in water
D. Prevent oxygen production
Correct Answer: B
Rationale: Aquatic pest control aims to manage pests without
disrupting ecosystem balance.


2. Which is a common aquatic weed?
A. Poa annua
B. Hydrilla
C. Taraxacum
D. Zea mays
Correct Answer: B
Rationale: Hydrilla is an invasive submerged aquatic plant.


3. Algae blooms are primarily caused by excess:
A. Oxygen

,B. Nitrogen and phosphorus
C. Calcium
D. Salt
Correct Answer: B
Rationale: Nutrient overload leads to eutrophication and algal
growth.


4. Eutrophication refers to:
A. Water purification
B. Nutrient enrichment of water bodies
C. Soil drying
D. Oxygen depletion reversal
Correct Answer: B


5. A selective herbicide:
A. Kills all plants
B. Targets specific species
C. Only kills insects
D. Is non-toxic
Correct Answer: B


6. Floating aquatic weeds are controlled best by:
A. Soil fumigation
B. Surface-applied herbicides
C. Fertilizers

,D. UV light only
Correct Answer: B


7. Aquatic weeds reduce oxygen by:
A. Photosynthesis increase
B. Blocking light penetration
C. Increasing fish reproduction
D. Increasing salinity
Correct Answer: B


8. A submerged weed example is:
A. Water lily
B. Duckweed
C. Elodea
D. Cattail
Correct Answer: C


9. The most important factor before applying aquatic
herbicides is:
A. Wind speed only
B. Water temperature
C. Water use restrictions
D. Soil type
Correct Answer: C

, 10. Aquatic pest control laws are enforced by:
A. Private companies
B. EPA and state agencies
C. Farmers only
D. Schools
Correct Answer: B


11. A major concern in aquatic pesticide use is:
A. Air pollution
B. Drift into water systems
C. Soil compaction
D. Noise pollution
Correct Answer: B


12. Contact herbicides kill plants by:
A. Systemic movement
B. Direct tissue contact
C. Root absorption only
D. Genetic modification
Correct Answer: B


13. Systemic herbicides:
A. Remain on surface only
B. Move within plant tissues
C. Evaporate quickly
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OREGON CATEGORY E AQUATIC PEST CONTROL ETI
Course
OREGON CATEGORY E AQUATIC PEST CONTROL ETI

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Uploaded on
July 6, 2026
Number of pages
44
Written in
2025/2026
Type
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Questions & answers

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