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Ohio Commercial Pesticide Applicator Certification
Category 10c Fumigation exam COMPLETE
QUESTIONS AND DETAILED SOLUTIONS LATEST
UPDATE THIS YEAR-JUST RELEASED
Ohio Commercial Pesticide Applicator Certification Category 10c: Fumigation exam coverage in
summarized point form, followed by 250 MCQs with rationales in random order, based on Ohio
Department of Agriculture (ODA) requirements, EPA Worker Protection Standard (WPS), and common
fumigation safety and application principles.
EXAM COVERAGE (SUMMARIZED POINTS)
• Licensing Requirements: Commercial applicator license; Category 10c is a Commercial category .
• Fumigant Definition: Pesticide that forms a gas/vapor to control pests in enclosed spaces .
• Application Sites: Structures, grain bins, warehouses, railcars, soil (tarps), commodities .
• Fumigant Types: Methyl bromide, phosphine (aluminum/magnesium phosphide), sulfuryl
fluoride, chloropicrin.
• Toxicity & Entry Hazards: Highly toxic by inhalation; requires specific PPE (air-purifying
respirator with appropriate cartridges or SCBA).
• Safety Data Sheets (SDS): Required on-site; must be accessible to workers.
• Worker Protection Standard (WPS): Decontamination supplies; emergency assistance; pesticide
safety training; restricted-entry intervals (REIs).
• Label Requirements: Use of closed systems; specific personal protective equipment (PPE);
application rates; aeration times.
• Engines & Motors: Proximity to application sites; carbon monoxide hazards.
• Flame & Spark Prevention: Extinguish pilot lights; no smoking; eliminate all ignition sources
(fumigants may be flammable).
• Signage & Security: Posting warning signs; securing the area during fumigation; re-entry
restrictions.
• Fumigation Management Plan (FMP): Required for certain fumigants; including site map,
emergency procedures, and notification plan.
• Aeration & Re-entry: Testing air concentrations before re-entry; use of monitoring equipment
(e.g., photoionization detector, gas detector tubes).
• Notification Requirements: Adjacent property owners/occupants (schools, businesses,
residences) as required by label and state/local regs.
• Emergency Response: Evacuation procedures; contacting emergency personnel;
decontamination.
• Transportation: Compliance with DOT hazardous materials regulations for fumigants.
• Storage: Fumigants stored in cool, dry, well-ventilated areas away from combustibles.
• Application Records: Retention period (3 years typical); date, location, fumigant, rate, target
pest.
• Soil Fumigation: Tarps; injection equipment; buffer zones; re-entry intervals.
• Structural Fumigation: Sealing the structure (tarps/tents); monitoring; aeration.
• Grain Bin Fumigation: Recirculation systems; surface application; aeration.
• Health Effects: Respiratory irritation, neurological symptoms, pulmonary edema,
methemoglobinemia (certain fumigants).
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• First Aid: Move to fresh air; artificial respiration; get medical attention immediately.
• Decontamination: Wash skin/hair with soap and water; remove contaminated clothing.
• Prohibited Acts: Use of fumigants inconsistent with labeling; false records; missing postings.
• Environmental Hazards: Toxicity to non-target organisms; groundwater contamination (soil
fumigants).
QUESTIONS 1–250
1. A Category 10c commercial applicator license is required for which type of pest control activity?
a) Spraying herbicides along a fence row
b) Applying a fumigant to control insects in a grain bin
c) Setting rodent traps in a warehouse
d) Applying disinfectants in a hospital
Rationale: Category 10c specifically covers the commercial application of fumigants for the control of
pests in structures or confined areas such as grain bins .
2. Which of the following is the most significant route of exposure when applying fumigants?
a) Dermal absorption
b) Inhalation
c) Eye contact
d) Ingestion
, Page 3 of 88
Rationale: Fumigants are gases or vapors; the primary and most dangerous route of exposure is
inhalation because they displace oxygen or are directly toxic when breathed.
3. Before re-entering a fumigated area, what must be verified?
a) The door is unlocked
b) The concentration of fumigant is below acceptable limits
c) The lights are on
d) The pest is dead
Rationale: Re-entry is prohibited until air monitoring confirms that fumigant concentrations have fallen
below the established safe exposure limits specified on the label.
4. According to WPS, decontamination supplies must be provided to handlers and early-entry workers.
These supplies include:
a) Food and beverages
b) Soap, water, and single-use towels
c) Bedding and shelter
d) Entertainment materials
, Page 4 of 88
Rationale: The Worker Protection Standard requires that pesticide handlers have access to adequate
decontamination supplies such as soap, water, and towels for washing off pesticide residues.
5. When fumigating a structure, pilot lights and other ignition sources should be:
a) Left on to prevent explosions
b) Extinguished before fumigant application
c) Relocated outside the structure
d) Covered with plastic
Rationale: Many fumigants are flammable or explosive. All pilot lights and potential ignition sources
must be eliminated before application to prevent fire or explosion .
6. Which document must be available on-site for each fumigant used, providing details on hazards and
emergency measures?
a) The pesticide label only
b) The Safety Data Sheet (SDS)
c) The applicator's logbook
d) The equipment manual
Ohio Commercial Pesticide Applicator Certification
Category 10c Fumigation exam COMPLETE
QUESTIONS AND DETAILED SOLUTIONS LATEST
UPDATE THIS YEAR-JUST RELEASED
Ohio Commercial Pesticide Applicator Certification Category 10c: Fumigation exam coverage in
summarized point form, followed by 250 MCQs with rationales in random order, based on Ohio
Department of Agriculture (ODA) requirements, EPA Worker Protection Standard (WPS), and common
fumigation safety and application principles.
EXAM COVERAGE (SUMMARIZED POINTS)
• Licensing Requirements: Commercial applicator license; Category 10c is a Commercial category .
• Fumigant Definition: Pesticide that forms a gas/vapor to control pests in enclosed spaces .
• Application Sites: Structures, grain bins, warehouses, railcars, soil (tarps), commodities .
• Fumigant Types: Methyl bromide, phosphine (aluminum/magnesium phosphide), sulfuryl
fluoride, chloropicrin.
• Toxicity & Entry Hazards: Highly toxic by inhalation; requires specific PPE (air-purifying
respirator with appropriate cartridges or SCBA).
• Safety Data Sheets (SDS): Required on-site; must be accessible to workers.
• Worker Protection Standard (WPS): Decontamination supplies; emergency assistance; pesticide
safety training; restricted-entry intervals (REIs).
• Label Requirements: Use of closed systems; specific personal protective equipment (PPE);
application rates; aeration times.
• Engines & Motors: Proximity to application sites; carbon monoxide hazards.
• Flame & Spark Prevention: Extinguish pilot lights; no smoking; eliminate all ignition sources
(fumigants may be flammable).
• Signage & Security: Posting warning signs; securing the area during fumigation; re-entry
restrictions.
• Fumigation Management Plan (FMP): Required for certain fumigants; including site map,
emergency procedures, and notification plan.
• Aeration & Re-entry: Testing air concentrations before re-entry; use of monitoring equipment
(e.g., photoionization detector, gas detector tubes).
• Notification Requirements: Adjacent property owners/occupants (schools, businesses,
residences) as required by label and state/local regs.
• Emergency Response: Evacuation procedures; contacting emergency personnel;
decontamination.
• Transportation: Compliance with DOT hazardous materials regulations for fumigants.
• Storage: Fumigants stored in cool, dry, well-ventilated areas away from combustibles.
• Application Records: Retention period (3 years typical); date, location, fumigant, rate, target
pest.
• Soil Fumigation: Tarps; injection equipment; buffer zones; re-entry intervals.
• Structural Fumigation: Sealing the structure (tarps/tents); monitoring; aeration.
• Grain Bin Fumigation: Recirculation systems; surface application; aeration.
• Health Effects: Respiratory irritation, neurological symptoms, pulmonary edema,
methemoglobinemia (certain fumigants).
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• First Aid: Move to fresh air; artificial respiration; get medical attention immediately.
• Decontamination: Wash skin/hair with soap and water; remove contaminated clothing.
• Prohibited Acts: Use of fumigants inconsistent with labeling; false records; missing postings.
• Environmental Hazards: Toxicity to non-target organisms; groundwater contamination (soil
fumigants).
QUESTIONS 1–250
1. A Category 10c commercial applicator license is required for which type of pest control activity?
a) Spraying herbicides along a fence row
b) Applying a fumigant to control insects in a grain bin
c) Setting rodent traps in a warehouse
d) Applying disinfectants in a hospital
Rationale: Category 10c specifically covers the commercial application of fumigants for the control of
pests in structures or confined areas such as grain bins .
2. Which of the following is the most significant route of exposure when applying fumigants?
a) Dermal absorption
b) Inhalation
c) Eye contact
d) Ingestion
, Page 3 of 88
Rationale: Fumigants are gases or vapors; the primary and most dangerous route of exposure is
inhalation because they displace oxygen or are directly toxic when breathed.
3. Before re-entering a fumigated area, what must be verified?
a) The door is unlocked
b) The concentration of fumigant is below acceptable limits
c) The lights are on
d) The pest is dead
Rationale: Re-entry is prohibited until air monitoring confirms that fumigant concentrations have fallen
below the established safe exposure limits specified on the label.
4. According to WPS, decontamination supplies must be provided to handlers and early-entry workers.
These supplies include:
a) Food and beverages
b) Soap, water, and single-use towels
c) Bedding and shelter
d) Entertainment materials
, Page 4 of 88
Rationale: The Worker Protection Standard requires that pesticide handlers have access to adequate
decontamination supplies such as soap, water, and towels for washing off pesticide residues.
5. When fumigating a structure, pilot lights and other ignition sources should be:
a) Left on to prevent explosions
b) Extinguished before fumigant application
c) Relocated outside the structure
d) Covered with plastic
Rationale: Many fumigants are flammable or explosive. All pilot lights and potential ignition sources
must be eliminated before application to prevent fire or explosion .
6. Which document must be available on-site for each fumigant used, providing details on hazards and
emergency measures?
a) The pesticide label only
b) The Safety Data Sheet (SDS)
c) The applicator's logbook
d) The equipment manual
