Washington Category 6 — Right-Of-Way
Pest Control Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
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1. Which area is primarily considered right-of-way (ROW)?
A. Home lawns
B. Agricultural crop fields
C. Roadsides, railways, and utility corridors
D. Indoor structures
Correct Answer: C
Rationale: Right-of-way areas include transportation corridors such
as highways, railways, and utility lines where vegetation control is
needed for safety and access.
2. The main purpose of vegetation control in ROW areas is to:
A. Increase crop yield
B. Improve visibility and safety
, C. Eliminate all plant life permanently
D. Promote ornamental growth
Correct Answer: B
Rationale: Vegetation is managed in ROW areas primarily to
maintain visibility, prevent fire hazards, and ensure safe travel and
infrastructure access.
3. Which herbicide application method targets cut stems of woody
plants?
A. Foliar spray
B. Basal bark
C. Cut-stump treatment
D. Soil injection
Correct Answer: C
Rationale: Cut-stump treatments apply herbicide directly to freshly
cut stumps to prevent resprouting of woody plants.
4. Drift of herbicides is most affected by:
A. Soil type
B. Wind speed
C. Plant height
D. Label color
Correct Answer: B
Rationale: Wind speed is a major factor influencing pesticide drift
away from target sites.
,5. A surfactant is used to:
A. Kill pests directly
B. Increase spray coverage and absorption
C. Neutralize herbicide toxicity
D. Dilute water hardness
Correct Answer: B
Rationale: Surfactants help herbicides spread and stick better to
plant surfaces for improved effectiveness.
6. Which PPE is most essential when mixing herbicides?
A. Sunglasses
B. Respirator, gloves, and goggles
C. Steel-toe boots only
D. Ear plugs
Correct Answer: B
Rationale: Mixing concentrates poses high exposure risk, requiring
full protective equipment including gloves, goggles, and respirators.
7. The term “label is the law” means:
A. Labels are suggestions
B. Only supervisors must follow labels
C. Pesticide labels must be strictly followed
D. Labels can be ignored if experience is high
Correct Answer: C
, Rationale: It is illegal to use pesticides in any manner inconsistent
with label directions under FIFRA regulations.
8. Selective herbicides are designed to:
A. Kill all vegetation
B. Target specific plant types
C. Sterilize soil permanently
D. Kill insects only
Correct Answer: B
Rationale: Selective herbicides target specific plant groups, such as
broadleaf weeds, while leaving others unharmed.
9. Non-selective herbicides:
A. Only kill grasses
B. Only kill broadleaf weeds
C. Kill most vegetation they contact
D. Only work in soil
Correct Answer: C
Rationale: Non-selective herbicides damage or kill nearly all plants
they contact.
10. Calibration of spray equipment ensures:
A. Faster spraying only
B. Accurate pesticide application rates
C. Lower water usage only
D. Higher wind drift
Pest Control Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
Download Pdf
1. Which area is primarily considered right-of-way (ROW)?
A. Home lawns
B. Agricultural crop fields
C. Roadsides, railways, and utility corridors
D. Indoor structures
Correct Answer: C
Rationale: Right-of-way areas include transportation corridors such
as highways, railways, and utility lines where vegetation control is
needed for safety and access.
2. The main purpose of vegetation control in ROW areas is to:
A. Increase crop yield
B. Improve visibility and safety
, C. Eliminate all plant life permanently
D. Promote ornamental growth
Correct Answer: B
Rationale: Vegetation is managed in ROW areas primarily to
maintain visibility, prevent fire hazards, and ensure safe travel and
infrastructure access.
3. Which herbicide application method targets cut stems of woody
plants?
A. Foliar spray
B. Basal bark
C. Cut-stump treatment
D. Soil injection
Correct Answer: C
Rationale: Cut-stump treatments apply herbicide directly to freshly
cut stumps to prevent resprouting of woody plants.
4. Drift of herbicides is most affected by:
A. Soil type
B. Wind speed
C. Plant height
D. Label color
Correct Answer: B
Rationale: Wind speed is a major factor influencing pesticide drift
away from target sites.
,5. A surfactant is used to:
A. Kill pests directly
B. Increase spray coverage and absorption
C. Neutralize herbicide toxicity
D. Dilute water hardness
Correct Answer: B
Rationale: Surfactants help herbicides spread and stick better to
plant surfaces for improved effectiveness.
6. Which PPE is most essential when mixing herbicides?
A. Sunglasses
B. Respirator, gloves, and goggles
C. Steel-toe boots only
D. Ear plugs
Correct Answer: B
Rationale: Mixing concentrates poses high exposure risk, requiring
full protective equipment including gloves, goggles, and respirators.
7. The term “label is the law” means:
A. Labels are suggestions
B. Only supervisors must follow labels
C. Pesticide labels must be strictly followed
D. Labels can be ignored if experience is high
Correct Answer: C
, Rationale: It is illegal to use pesticides in any manner inconsistent
with label directions under FIFRA regulations.
8. Selective herbicides are designed to:
A. Kill all vegetation
B. Target specific plant types
C. Sterilize soil permanently
D. Kill insects only
Correct Answer: B
Rationale: Selective herbicides target specific plant groups, such as
broadleaf weeds, while leaving others unharmed.
9. Non-selective herbicides:
A. Only kill grasses
B. Only kill broadleaf weeds
C. Kill most vegetation they contact
D. Only work in soil
Correct Answer: C
Rationale: Non-selective herbicides damage or kill nearly all plants
they contact.
10. Calibration of spray equipment ensures:
A. Faster spraying only
B. Accurate pesticide application rates
C. Lower water usage only
D. Higher wind drift
