New Hampshire Category L —
Fumigation Pest Control Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the primary purpose of fumigation in pest control?
A. To repel pests
B. To sterilize soil only
C. To eliminate pests in enclosed spaces using gas
D. To trap insects using bait
Answer: C
Rationale: Fumigation uses toxic gases in enclosed spaces to kill pests in all
life stages.
2. Which property is essential for an effective fumigant?
A. High viscosity
B. High volatility
, C. Low solubility in water
D. High color intensity
Answer: B
Rationale: A fumigant must volatilize easily to penetrate treated areas as a
gas.
3. Phosphine gas is commonly released from:
A. Liquid nitrogen
B. Aluminum phosphide
C. Sodium chloride
D. Calcium carbonate
Answer: B
Rationale: Aluminum phosphide reacts with moisture to produce phosphine
gas.
4. Why must fumigated areas be sealed properly?
A. To increase humidity
B. To prevent gas leakage
C. To reduce temperature
D. To improve lighting
Answer: B
Rationale: Sealing prevents fumigant escape and ensures lethal
concentration.
, 5. Which gas is commonly used in structural fumigation?
A. Oxygen
B. Nitrogen
C. Sulfur dioxide
D. Sulfuryl fluoride
Answer: D
Rationale: Sulfuryl fluoride is widely used for structural pest fumigation.
6. What PPE is essential during fumigation?
A. Sunglasses
B. Chemical-resistant gloves and respirator
C. Cotton gloves only
D. Ear plugs
Answer: B
Rationale: Fumigants are toxic; proper respiratory and skin protection is
required.
7. What is the main hazard of fumigants?
A. Fire hazard only
B. Corrosion of metals
C. High acute toxicity
D. Low effectiveness
, Answer: C
Rationale: Fumigants are highly toxic to humans and animals.
8. Which factor most affects fumigant effectiveness?
A. Soil color
B. Temperature
C. Pest size only
D. Wind direction indoors
Answer: B
Rationale: Higher temperatures increase fumigant activity and
penetration.
9. What is phosphine gas primarily used for?
A. Weed control
B. Stored grain fumigation
C. Tree pruning
D. Water purification
Answer: B
Rationale: Phosphine is widely used in stored grain pest control.
10. What does “aeration” mean after fumigation?
A. Adding more fumigant
B. Cooling the structure
Fumigation Pest Control Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the primary purpose of fumigation in pest control?
A. To repel pests
B. To sterilize soil only
C. To eliminate pests in enclosed spaces using gas
D. To trap insects using bait
Answer: C
Rationale: Fumigation uses toxic gases in enclosed spaces to kill pests in all
life stages.
2. Which property is essential for an effective fumigant?
A. High viscosity
B. High volatility
, C. Low solubility in water
D. High color intensity
Answer: B
Rationale: A fumigant must volatilize easily to penetrate treated areas as a
gas.
3. Phosphine gas is commonly released from:
A. Liquid nitrogen
B. Aluminum phosphide
C. Sodium chloride
D. Calcium carbonate
Answer: B
Rationale: Aluminum phosphide reacts with moisture to produce phosphine
gas.
4. Why must fumigated areas be sealed properly?
A. To increase humidity
B. To prevent gas leakage
C. To reduce temperature
D. To improve lighting
Answer: B
Rationale: Sealing prevents fumigant escape and ensures lethal
concentration.
, 5. Which gas is commonly used in structural fumigation?
A. Oxygen
B. Nitrogen
C. Sulfur dioxide
D. Sulfuryl fluoride
Answer: D
Rationale: Sulfuryl fluoride is widely used for structural pest fumigation.
6. What PPE is essential during fumigation?
A. Sunglasses
B. Chemical-resistant gloves and respirator
C. Cotton gloves only
D. Ear plugs
Answer: B
Rationale: Fumigants are toxic; proper respiratory and skin protection is
required.
7. What is the main hazard of fumigants?
A. Fire hazard only
B. Corrosion of metals
C. High acute toxicity
D. Low effectiveness
, Answer: C
Rationale: Fumigants are highly toxic to humans and animals.
8. Which factor most affects fumigant effectiveness?
A. Soil color
B. Temperature
C. Pest size only
D. Wind direction indoors
Answer: B
Rationale: Higher temperatures increase fumigant activity and
penetration.
9. What is phosphine gas primarily used for?
A. Weed control
B. Stored grain fumigation
C. Tree pruning
D. Water purification
Answer: B
Rationale: Phosphine is widely used in stored grain pest control.
10. What does “aeration” mean after fumigation?
A. Adding more fumigant
B. Cooling the structure
