California Branch 1 (Fumigation)
Field Representative Exam Prep
Practice Questions And Answers with Expert-Level Rationales Latest
Update 2026 For Guaranteed Success A+ Rated Get It Now / study guide
,Contents by Category
Fumigant Chemistry & Properties — Questions 1–14
Safety & Personal Protective Equipment — Questions 15–28
Tenting & Tarping Procedures — Questions 29–40
Regulations & Documentation — Questions 41–56
Application, Monitoring & Clearance — Questions 57–72
First Aid, Emergency Response & Health Effects — Questions 73–86
Equipment & Calculations — Questions 87–100
,1. Which fumigant is most commonly used for structural fumigation of
drywood termites in California?
A. Methyl bromide
B. Sulfuryl fluoride
C. Chloropicrin
D. Phosphine
Answer: B
Rationale: Sulfuryl fluoride (marketed as Vikane) is the primary fumigant used
for structural drywood termite fumigation in California because it penetrates
wood effectively, leaves no residue, and does not damage most structural
materials or finishes.
2. Why is chloropicrin often added to a fumigant even when it is not the
primary killing agent?
A. It increases the fumigant's insecticidal potency
B. It serves as a warning agent because of its strong, irritating odor
C. It reduces the cost of the fumigation
D. It speeds up aeration time
Answer: B
Rationale: Chloropicrin has a strong lacrimatory (tear-inducing) and irritating
odor at very low concentrations, making it an effective warning agent that alerts
people to the presence of an otherwise difficult-to-detect fumigant before
dangerous concentrations are reached.
3. Sulfuryl fluoride is characterized by which of the following properties?
A. It is colorless and virtually odorless, requiring the use of a warning agent
B. It has a strong garlic-like odor detectable at safe concentrations
C. It is highly flammable and explosive
D. It leaves a visible residue on treated surfaces
Answer: A
, Rationale: Sulfuryl fluoride is colorless and essentially odorless at
concentrations used in fumigation, which is why chloropicrin is typically
introduced first as a warning agent to alert occupants and workers to its
presence.
4. What is the vapor density of sulfuryl fluoride relative to air, and what
practical implication does this have for fumigation?
A. It is heavier than air, so it tends to settle toward lower areas of a structure
and must be circulated to reach upper levels
B. It is lighter than air and rises to the top of a structure only
C. It has the same density as air and does not require circulation
D. Its density varies unpredictably and cannot be planned for
Answer: A
Rationale: Sulfuryl fluoride has a vapor density heavier than air, meaning it
tends to concentrate in lower areas; circulation fans are used during fumigation
to ensure even gas distribution throughout all levels of the structure.
5. Which factor most directly affects the required fumigant dosage for a
structural fumigation?
A. The color of the exterior tarpaulins used
B. Temperature, structure volume, and target pest tolerance
C. The day of the week the fumigation is performed
D. The number of vehicles parked near the structure
Answer: B
Rationale: Fumigant dosage calculations are based on the volume of the
structure, ambient and structural temperature (which affects fumigant activity),
and the tolerance level of the target pest, since lower temperatures generally
require higher dosages or longer exposure periods.
6. A fumigation technician notes that a fumigant readily penetrates wood,
fabric, and other porous materials. This property is referred to as which of
the following?
A. Sorption resistance
Field Representative Exam Prep
Practice Questions And Answers with Expert-Level Rationales Latest
Update 2026 For Guaranteed Success A+ Rated Get It Now / study guide
,Contents by Category
Fumigant Chemistry & Properties — Questions 1–14
Safety & Personal Protective Equipment — Questions 15–28
Tenting & Tarping Procedures — Questions 29–40
Regulations & Documentation — Questions 41–56
Application, Monitoring & Clearance — Questions 57–72
First Aid, Emergency Response & Health Effects — Questions 73–86
Equipment & Calculations — Questions 87–100
,1. Which fumigant is most commonly used for structural fumigation of
drywood termites in California?
A. Methyl bromide
B. Sulfuryl fluoride
C. Chloropicrin
D. Phosphine
Answer: B
Rationale: Sulfuryl fluoride (marketed as Vikane) is the primary fumigant used
for structural drywood termite fumigation in California because it penetrates
wood effectively, leaves no residue, and does not damage most structural
materials or finishes.
2. Why is chloropicrin often added to a fumigant even when it is not the
primary killing agent?
A. It increases the fumigant's insecticidal potency
B. It serves as a warning agent because of its strong, irritating odor
C. It reduces the cost of the fumigation
D. It speeds up aeration time
Answer: B
Rationale: Chloropicrin has a strong lacrimatory (tear-inducing) and irritating
odor at very low concentrations, making it an effective warning agent that alerts
people to the presence of an otherwise difficult-to-detect fumigant before
dangerous concentrations are reached.
3. Sulfuryl fluoride is characterized by which of the following properties?
A. It is colorless and virtually odorless, requiring the use of a warning agent
B. It has a strong garlic-like odor detectable at safe concentrations
C. It is highly flammable and explosive
D. It leaves a visible residue on treated surfaces
Answer: A
, Rationale: Sulfuryl fluoride is colorless and essentially odorless at
concentrations used in fumigation, which is why chloropicrin is typically
introduced first as a warning agent to alert occupants and workers to its
presence.
4. What is the vapor density of sulfuryl fluoride relative to air, and what
practical implication does this have for fumigation?
A. It is heavier than air, so it tends to settle toward lower areas of a structure
and must be circulated to reach upper levels
B. It is lighter than air and rises to the top of a structure only
C. It has the same density as air and does not require circulation
D. Its density varies unpredictably and cannot be planned for
Answer: A
Rationale: Sulfuryl fluoride has a vapor density heavier than air, meaning it
tends to concentrate in lower areas; circulation fans are used during fumigation
to ensure even gas distribution throughout all levels of the structure.
5. Which factor most directly affects the required fumigant dosage for a
structural fumigation?
A. The color of the exterior tarpaulins used
B. Temperature, structure volume, and target pest tolerance
C. The day of the week the fumigation is performed
D. The number of vehicles parked near the structure
Answer: B
Rationale: Fumigant dosage calculations are based on the volume of the
structure, ambient and structural temperature (which affects fumigant activity),
and the tolerance level of the target pest, since lower temperatures generally
require higher dosages or longer exposure periods.
6. A fumigation technician notes that a fumigant readily penetrates wood,
fabric, and other porous materials. This property is referred to as which of
the following?
A. Sorption resistance
