OKLAHOMA CATEGORY 5 AQUATIC PEST CONTROL
EXAM QUESTIONS AND CORRECT ANSWERS
(VERIFED ANSWERS) Q&A 2027|INSTANT
FOWNLOAD PDF
1. What is the primary goal of aquatic pest control?
A. Increase fish population
B. Eliminate all aquatic plants
C. Manage harmful aquatic pests while protecting water
systems
D. Increase water pollution
Rationale: Aquatic pest control focuses on balancing
ecosystems, not elimination.
Correct Answer: C
2. Which organism is considered an aquatic pest?
A. Trout
B. Duckweed (excess growth)
C. Bass
D. Catfish
Rationale: Duckweed becomes a pest when overgrown.
Correct Answer: B
,3. Herbicides used in water are called:
A. Terrestrial herbicides
B. Aquatic herbicides
C. Soil sterilants
D. Fungicides
Rationale: Aquatic herbicides are formulated for water use.
Correct Answer: B
4. Eutrophication is caused by:
A. Low oxygen levels
B. Excess nutrients in water
C. Cold temperatures
D. Fish migration
Rationale: Nutrient overload promotes plant/algae growth.
Correct Answer: B
5. Which is a submerged aquatic plant?
A. Water lily
B. Cattail
C. Hydrilla
D. Grass
Rationale: Hydrilla grows fully underwater.
Correct Answer: C
,6. Algae blooms are most often caused by:
A. Low sunlight
B. High nutrient levels
C. High salinity
D. Fish predators
Rationale: Nutrients fuel algae growth.
Correct Answer: B
7. Which is a mechanical aquatic weed control method?
A. Herbicide spraying
B. Dredging
C. Fertilization
D. Seeding
Rationale: Dredging physically removes vegetation.
Correct Answer: B
8. Aquatic herbicides must be:
A. Highly toxic to fish
B. Approved for water use
C. Colorless
D. Organic only
Rationale: Only labeled aquatic-use products are safe.
Correct Answer: B
, 9. What does dissolved oxygen affect most?
A. Water color
B. Fish survival
C. Plant height
D. Soil type
Rationale: Fish need oxygen to survive.
Correct Answer: B
10. Which is a floating aquatic plant?
A. Coontail
B. Duckweed
C. Milfoil
D. Elodea
Rationale: Duckweed floats freely on water surface.
Correct Answer: B
11. What is selective herbicide action?
A. Kills all plants
B. Targets specific species
C. Only works on algae
D. Only works on fish
Rationale: Selective herbicides target certain plants.
Correct Answer: B
EXAM QUESTIONS AND CORRECT ANSWERS
(VERIFED ANSWERS) Q&A 2027|INSTANT
FOWNLOAD PDF
1. What is the primary goal of aquatic pest control?
A. Increase fish population
B. Eliminate all aquatic plants
C. Manage harmful aquatic pests while protecting water
systems
D. Increase water pollution
Rationale: Aquatic pest control focuses on balancing
ecosystems, not elimination.
Correct Answer: C
2. Which organism is considered an aquatic pest?
A. Trout
B. Duckweed (excess growth)
C. Bass
D. Catfish
Rationale: Duckweed becomes a pest when overgrown.
Correct Answer: B
,3. Herbicides used in water are called:
A. Terrestrial herbicides
B. Aquatic herbicides
C. Soil sterilants
D. Fungicides
Rationale: Aquatic herbicides are formulated for water use.
Correct Answer: B
4. Eutrophication is caused by:
A. Low oxygen levels
B. Excess nutrients in water
C. Cold temperatures
D. Fish migration
Rationale: Nutrient overload promotes plant/algae growth.
Correct Answer: B
5. Which is a submerged aquatic plant?
A. Water lily
B. Cattail
C. Hydrilla
D. Grass
Rationale: Hydrilla grows fully underwater.
Correct Answer: C
,6. Algae blooms are most often caused by:
A. Low sunlight
B. High nutrient levels
C. High salinity
D. Fish predators
Rationale: Nutrients fuel algae growth.
Correct Answer: B
7. Which is a mechanical aquatic weed control method?
A. Herbicide spraying
B. Dredging
C. Fertilization
D. Seeding
Rationale: Dredging physically removes vegetation.
Correct Answer: B
8. Aquatic herbicides must be:
A. Highly toxic to fish
B. Approved for water use
C. Colorless
D. Organic only
Rationale: Only labeled aquatic-use products are safe.
Correct Answer: B
, 9. What does dissolved oxygen affect most?
A. Water color
B. Fish survival
C. Plant height
D. Soil type
Rationale: Fish need oxygen to survive.
Correct Answer: B
10. Which is a floating aquatic plant?
A. Coontail
B. Duckweed
C. Milfoil
D. Elodea
Rationale: Duckweed floats freely on water surface.
Correct Answer: B
11. What is selective herbicide action?
A. Kills all plants
B. Targets specific species
C. Only works on algae
D. Only works on fish
Rationale: Selective herbicides target certain plants.
Correct Answer: B
