Minnesota Category C Aquatic Pest Control Exam
questions and Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant Download Pdf
1. What is the primary purpose of aquatic pest control?
A. Increase fish population
B. Control harmful aquatic plants and pests
C. Improve water taste
D. Increase water temperature
Answer: B
Aquatic pest control is mainly used to manage unwanted organisms in
water systems.
2. Which is a common aquatic weed?
A. Crabgrass
B. Duckweed
C. Clover
D. Ragweed
Answer: B
,Duckweed is a floating aquatic plant commonly found in ponds and
lakes.
3. Herbicides used in water must be:
A. Highly volatile
B. Registered for aquatic use
C. Oil-based only
D. Illegal on land
Answer: B
Only herbicides specifically labeled for aquatic environments may be
used.
4. A major concern when treating aquatic weeds is:
A. Soil erosion
B. Oxygen depletion
C. Wind drift
D. Soil compaction
Answer: B
Decomposition of weeds can reduce dissolved oxygen in water.
,5. What does a selective herbicide do?
A. Kills all plants
B. Targets specific plants
C. Kills only algae
D. Sterilizes water
Answer: B
Selective herbicides target specific species without harming others.
6. Algae growth is most often caused by:
A. Low nutrients
B. Excess nutrients
C. Cold temperatures
D. High salinity
Answer: B
Nutrient-rich water encourages algae blooms.
7. Which factor affects herbicide effectiveness most?
A. Color of water
B. Water temperature
C. Fish species
, D. Wind speed
Answer: B
Temperature influences plant metabolism and herbicide activity.
8. A surfactant is used to:
A. Kill fish
B. Increase spray sticking ability
C. Lower water level
D. Neutralize herbicide
Answer: B
Surfactants help herbicides adhere to plant surfaces.
9. Aquatic pesticides must be applied:
A. At night only
B. According to label instructions
C. In rain
D. Without training
Answer: B
Label instructions are legally binding.
questions and Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant Download Pdf
1. What is the primary purpose of aquatic pest control?
A. Increase fish population
B. Control harmful aquatic plants and pests
C. Improve water taste
D. Increase water temperature
Answer: B
Aquatic pest control is mainly used to manage unwanted organisms in
water systems.
2. Which is a common aquatic weed?
A. Crabgrass
B. Duckweed
C. Clover
D. Ragweed
Answer: B
,Duckweed is a floating aquatic plant commonly found in ponds and
lakes.
3. Herbicides used in water must be:
A. Highly volatile
B. Registered for aquatic use
C. Oil-based only
D. Illegal on land
Answer: B
Only herbicides specifically labeled for aquatic environments may be
used.
4. A major concern when treating aquatic weeds is:
A. Soil erosion
B. Oxygen depletion
C. Wind drift
D. Soil compaction
Answer: B
Decomposition of weeds can reduce dissolved oxygen in water.
,5. What does a selective herbicide do?
A. Kills all plants
B. Targets specific plants
C. Kills only algae
D. Sterilizes water
Answer: B
Selective herbicides target specific species without harming others.
6. Algae growth is most often caused by:
A. Low nutrients
B. Excess nutrients
C. Cold temperatures
D. High salinity
Answer: B
Nutrient-rich water encourages algae blooms.
7. Which factor affects herbicide effectiveness most?
A. Color of water
B. Water temperature
C. Fish species
, D. Wind speed
Answer: B
Temperature influences plant metabolism and herbicide activity.
8. A surfactant is used to:
A. Kill fish
B. Increase spray sticking ability
C. Lower water level
D. Neutralize herbicide
Answer: B
Surfactants help herbicides adhere to plant surfaces.
9. Aquatic pesticides must be applied:
A. At night only
B. According to label instructions
C. In rain
D. Without training
Answer: B
Label instructions are legally binding.
