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California (CA) Branch 1 (Fumigation) Field Representative
Exam | Latest Verified Questions and Detailed Answers
OVERVIEW DESCRIPTION
This comprehensive set of multiple choice questions is designed for the California
Branch 1 (Fumigation) Field Representative Exam, administered by the state's
Structural Pest Control Board (SPCB). The exam assesses a candidate's competency in
the safe and effective use of lethal gases for structural pest control, covering key
knowledge domains such as fumigants and label comprehension, personal protective
equipment and safety precautions, proper fumigation preparation, application, aeration,
and clearance procedures, the California Aeration Plan (CAP) and other state rules and
regulations, pest identification and biology, and essential business and law practices.
QUESTION 1
Which gas is the active ingredient in Vikane fumigant?
A) Methyl bromide
B) Sulfuryl fluoride
C) Phosphine
D) Chloropicrin
CORRECT ANSWER: B
EXPERT RATIONALE:
Vikane's active ingredient is sulfuryl fluoride, a colorless, odorless gas used for structural
fumigation. Methyl bromide is a separate fumigant often sold as Zythor or other brands.
QUESTION 2
The California Aeration Plan (CAP) for sulfuryl fluoride fumigations requires clearance
monitoring until the concentration at breathing zone height is at or below:
A) 1 ppm
B) 5 ppm
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C) 10 ppm
D) 15 ppm
CORRECT ANSWER: B
EXPERT RATIONALE:
CAP mandates that re-entry cannot occur until sulfuryl fluoride levels are 5 ppm or less,
verified by a direct-reading device. This protects occupants from overexposure.
QUESTION 3
A Branch 1 Field Representative who intends to change employers must provide written
notice to the current employer at least how many days before the change?
A) 5 days
B) 10 days
C) 15 days
D) 30 days
CORRECT ANSWER: B
EXPERT RATIONALE:
Pursuant to the Structural Pest Control Act, a field representative must give 10 days'
written notice before changing employment. The employer must then notify the board
within 10 days of termination.
QUESTION 4
What is the primary purpose of introducing chloropicrin during a Vikane fumigation?
A) Increase fumigant toxicity
B) Serve as a warning agent
C) Accelerate aeration
D) Reduce dosage needed
CORRECT ANSWER: B
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EXPERT RATIONALE:
Sulfuryl fluoride is odorless, so chloropicrin (a tear gas) is added as a warning agent to
alert anyone inadvertently entering the fumigated space. It does not enhance pesticidal
activity.
QUESTION 5
Which of the following drywood termite species is most commonly targeted by
structural fumigation in California?
A) Reticulitermes flavipes
B) Incisitermes minor
C) Coptotermes formosanus
D) Zootermopsis angusticollis
CORRECT ANSWER: B
EXPERT RATIONALE:
Incisitermes minor, the western drywood termite, is a prevalent wood-destroying pest in
California and is commonly controlled by whole-structure fumigation. Other species
listed are subterranean or dampwood termites.
QUESTION 6
After releasing sulfuryl fluoride into a structure, the fumigator must verify that lethal
concentrations are maintained. Which device is typically used to measure gas
concentration during fumigation?
A) Photoionization detector
B) Fumiscope or thermal conductivity analyzer
C) Oxygen meter
D) Infrared thermometer
CORRECT ANSWER: B
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EXPERT RATIONALE:
Fumiscope (thermal conductivity) is standard for monitoring sulfuryl fluoride or methyl
bromide levels inside the fumigated space. Other devices like SF-ExplorIR are used for
low-level clearance.
QUESTION 7
When handling methyl bromide, what delayed health effect is of particular concern after
acute exposure?
A) Kidney failure
B) Pulmonary edema
C) Cataracts
D) Permanent hearing loss
CORRECT ANSWER: B
EXPERT RATIONALE:
Methyl bromide can cause delayed pulmonary edema (fluid in lungs) hours to days after
exposure. Neurological effects may also appear later, making medical surveillance
critical.
QUESTION 8
What is the minimum width of a warning sign posted on a fumigated structure
according to California regulations?
A) 8 inches
B) 10 inches
C) 12 inches
D) 18 inches
CORRECT ANSWER: C
California (CA) Branch 1 (Fumigation) Field Representative
Exam | Latest Verified Questions and Detailed Answers
OVERVIEW DESCRIPTION
This comprehensive set of multiple choice questions is designed for the California
Branch 1 (Fumigation) Field Representative Exam, administered by the state's
Structural Pest Control Board (SPCB). The exam assesses a candidate's competency in
the safe and effective use of lethal gases for structural pest control, covering key
knowledge domains such as fumigants and label comprehension, personal protective
equipment and safety precautions, proper fumigation preparation, application, aeration,
and clearance procedures, the California Aeration Plan (CAP) and other state rules and
regulations, pest identification and biology, and essential business and law practices.
QUESTION 1
Which gas is the active ingredient in Vikane fumigant?
A) Methyl bromide
B) Sulfuryl fluoride
C) Phosphine
D) Chloropicrin
CORRECT ANSWER: B
EXPERT RATIONALE:
Vikane's active ingredient is sulfuryl fluoride, a colorless, odorless gas used for structural
fumigation. Methyl bromide is a separate fumigant often sold as Zythor or other brands.
QUESTION 2
The California Aeration Plan (CAP) for sulfuryl fluoride fumigations requires clearance
monitoring until the concentration at breathing zone height is at or below:
A) 1 ppm
B) 5 ppm
,2|Page
C) 10 ppm
D) 15 ppm
CORRECT ANSWER: B
EXPERT RATIONALE:
CAP mandates that re-entry cannot occur until sulfuryl fluoride levels are 5 ppm or less,
verified by a direct-reading device. This protects occupants from overexposure.
QUESTION 3
A Branch 1 Field Representative who intends to change employers must provide written
notice to the current employer at least how many days before the change?
A) 5 days
B) 10 days
C) 15 days
D) 30 days
CORRECT ANSWER: B
EXPERT RATIONALE:
Pursuant to the Structural Pest Control Act, a field representative must give 10 days'
written notice before changing employment. The employer must then notify the board
within 10 days of termination.
QUESTION 4
What is the primary purpose of introducing chloropicrin during a Vikane fumigation?
A) Increase fumigant toxicity
B) Serve as a warning agent
C) Accelerate aeration
D) Reduce dosage needed
CORRECT ANSWER: B
,3|Page
EXPERT RATIONALE:
Sulfuryl fluoride is odorless, so chloropicrin (a tear gas) is added as a warning agent to
alert anyone inadvertently entering the fumigated space. It does not enhance pesticidal
activity.
QUESTION 5
Which of the following drywood termite species is most commonly targeted by
structural fumigation in California?
A) Reticulitermes flavipes
B) Incisitermes minor
C) Coptotermes formosanus
D) Zootermopsis angusticollis
CORRECT ANSWER: B
EXPERT RATIONALE:
Incisitermes minor, the western drywood termite, is a prevalent wood-destroying pest in
California and is commonly controlled by whole-structure fumigation. Other species
listed are subterranean or dampwood termites.
QUESTION 6
After releasing sulfuryl fluoride into a structure, the fumigator must verify that lethal
concentrations are maintained. Which device is typically used to measure gas
concentration during fumigation?
A) Photoionization detector
B) Fumiscope or thermal conductivity analyzer
C) Oxygen meter
D) Infrared thermometer
CORRECT ANSWER: B
, 4|Page
EXPERT RATIONALE:
Fumiscope (thermal conductivity) is standard for monitoring sulfuryl fluoride or methyl
bromide levels inside the fumigated space. Other devices like SF-ExplorIR are used for
low-level clearance.
QUESTION 7
When handling methyl bromide, what delayed health effect is of particular concern after
acute exposure?
A) Kidney failure
B) Pulmonary edema
C) Cataracts
D) Permanent hearing loss
CORRECT ANSWER: B
EXPERT RATIONALE:
Methyl bromide can cause delayed pulmonary edema (fluid in lungs) hours to days after
exposure. Neurological effects may also appear later, making medical surveillance
critical.
QUESTION 8
What is the minimum width of a warning sign posted on a fumigated structure
according to California regulations?
A) 8 inches
B) 10 inches
C) 12 inches
D) 18 inches
CORRECT ANSWER: C
