CA QAL/QAC Category F Aquatic Practice
Exam Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. The primary objective of aquatic pest control is to:
A. Eliminate all plant life
B. Maintain ecological balance
C. Increase water turbidity
D. Promote algae growth
Answer: B
Rationale: Aquatic pest control focuses on managing pests while
preserving the ecological balance of the water body.
2. Which factor most directly influences herbicide selection for
aquatic use?
A. Air temperature
B. Water depth and flow
C. Soil compaction
D. Wind direction
Answer: B
Rationale: Water depth and flow affect herbicide dispersion,
concentration, and effectiveness.
3. An applicator treating an irrigation canal must be especially
cautious about:
, A. Sunlight intensity
B. Downstream water use
C. Fish migration
D. Sediment type
Answer: B
Rationale: Treated water may be used downstream for crops,
livestock, or drinking, requiring strict label compliance.
4. Which aquatic plant is classified as a submerged species?
A. Water hyacinth
B. Duckweed
C. Hydrilla
D. Cattail
Answer: C
Rationale: Hydrilla grows entirely below the water surface,
classifying it as submerged.
5. Floating aquatic plants primarily reproduce by:
A. Spores
B. Tubers
C. Rhizomes
D. Vegetative fragmentation
Answer: D
Rationale: Many floating plants spread rapidly through vegetative
fragmentation.
6. Dissolved oxygen depletion after herbicide treatment is most likely
caused by:
A. Chemical toxicity
B. Plant decay
, C. Increased salinity
D. Water stratification
Answer: B
Rationale: Decaying plant material consumes oxygen during
decomposition.
7. Which organism is commonly targeted in aquatic mosquito
control?
A. Adult mosquitoes
B. Mosquito larvae
C. Dragonflies
D. Water beetles
Answer: B
Rationale: Larval control is more effective and environmentally
sound than targeting adults.
8. When applying pesticides near potable water sources, applicators
must follow:
A. Federal Aviation Regulations
B. Restricted entry intervals
C. Drinking water setback requirements
D. Worker housing rules
Answer: C
Rationale: Setback requirements protect drinking water from
contamination.
9. Emergent aquatic plants are best described as plants that:
A. Float freely
B. Grow entirely underwater
C. Are rooted with foliage above water
, D. Grow only in saline water
Answer: C
Rationale: Emergent plants are rooted underwater with stems and
leaves above the surface.
10. Which method provides the most selective aquatic weed
control?
A. Mechanical harvesting
B. Chemical control
C. Biological control
D. Water drawdown
Answer: C
Rationale: Biological control targets specific species with minimal
impact on non-targets.
11. Water temperature affects pesticide performance by
influencing:
A. Label language
B. Chemical solubility and plant metabolism
C. Spray equipment pressure
D. Applicator safety gear
Answer: B
Rationale: Temperature impacts how chemicals dissolve and how
plants absorb them.
12. Which aquatic pest is classified as an algae?
A. Hydrilla
B. Eurasian watermilfoil
C. Chara
D. Cattail
Exam Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. The primary objective of aquatic pest control is to:
A. Eliminate all plant life
B. Maintain ecological balance
C. Increase water turbidity
D. Promote algae growth
Answer: B
Rationale: Aquatic pest control focuses on managing pests while
preserving the ecological balance of the water body.
2. Which factor most directly influences herbicide selection for
aquatic use?
A. Air temperature
B. Water depth and flow
C. Soil compaction
D. Wind direction
Answer: B
Rationale: Water depth and flow affect herbicide dispersion,
concentration, and effectiveness.
3. An applicator treating an irrigation canal must be especially
cautious about:
, A. Sunlight intensity
B. Downstream water use
C. Fish migration
D. Sediment type
Answer: B
Rationale: Treated water may be used downstream for crops,
livestock, or drinking, requiring strict label compliance.
4. Which aquatic plant is classified as a submerged species?
A. Water hyacinth
B. Duckweed
C. Hydrilla
D. Cattail
Answer: C
Rationale: Hydrilla grows entirely below the water surface,
classifying it as submerged.
5. Floating aquatic plants primarily reproduce by:
A. Spores
B. Tubers
C. Rhizomes
D. Vegetative fragmentation
Answer: D
Rationale: Many floating plants spread rapidly through vegetative
fragmentation.
6. Dissolved oxygen depletion after herbicide treatment is most likely
caused by:
A. Chemical toxicity
B. Plant decay
, C. Increased salinity
D. Water stratification
Answer: B
Rationale: Decaying plant material consumes oxygen during
decomposition.
7. Which organism is commonly targeted in aquatic mosquito
control?
A. Adult mosquitoes
B. Mosquito larvae
C. Dragonflies
D. Water beetles
Answer: B
Rationale: Larval control is more effective and environmentally
sound than targeting adults.
8. When applying pesticides near potable water sources, applicators
must follow:
A. Federal Aviation Regulations
B. Restricted entry intervals
C. Drinking water setback requirements
D. Worker housing rules
Answer: C
Rationale: Setback requirements protect drinking water from
contamination.
9. Emergent aquatic plants are best described as plants that:
A. Float freely
B. Grow entirely underwater
C. Are rooted with foliage above water
, D. Grow only in saline water
Answer: C
Rationale: Emergent plants are rooted underwater with stems and
leaves above the surface.
10. Which method provides the most selective aquatic weed
control?
A. Mechanical harvesting
B. Chemical control
C. Biological control
D. Water drawdown
Answer: C
Rationale: Biological control targets specific species with minimal
impact on non-targets.
11. Water temperature affects pesticide performance by
influencing:
A. Label language
B. Chemical solubility and plant metabolism
C. Spray equipment pressure
D. Applicator safety gear
Answer: B
Rationale: Temperature impacts how chemicals dissolve and how
plants absorb them.
12. Which aquatic pest is classified as an algae?
A. Hydrilla
B. Eurasian watermilfoil
C. Chara
D. Cattail
