GEORGIA CERTIFIED OPERATOR (GCO) FINAL EXAM -
WDO CATEGORY UPDATED ACTUAL EXAM
QUESTIONS AND CORRECT ANSWERS WITH
RATIONALES (100% VERIFIED) | NEWEST VERSION
2026 | ALREADY GRADED A+
SECTION 1: CRAWLSPACES & MOISTURE CONTROL (Questions 1–35)
1. If you smell a gas leak in a crawlspace, what should you do?
A) Enter quickly to locate the source
B) Open a vent and continue working
C) Don't go in or get out
D) Call your supervisor before exiting
Correct Answer: C
Safety is the highest priority. If you smell gas in a crawlspace, do not enter—evacuate immediately and notify
emergency services.
2. What safety equipment (PPE) should you wear when in crawlspaces?
A) Safety glasses only
B) Bump cap, coveralls, safety glasses, respirator, and knee pads
C) Steel-toe boots and gloves
D) Hard hat and goggles only
Correct Answer: B
1|P a g e SUCCESS!!!
,PPE for crawlspaces includes a bump cap, coveralls, safety glasses, a respirator, and knee pads to protect against
physical hazards, contaminants, and pests.
3. Why is excess moisture in crawl spaces such a big concern for customers?
A) It causes cosmetic damage only
B) It facilitates an environment for pests that can cause structural and health concerns
C) It increases energy costs
D) It makes the space harder to access
Correct Answer: B
Excess moisture creates conditions favorable for wood-destroying organisms and mold, leading to structural
damage and potential health issues for occupants.
4. True or False: Do customers breathe the air from the crawlspace?
A) True
B) False
Correct Answer: A
Air from the crawlspace can enter the living space through the stack effect, potentially carrying mold spores,
allergens, and other contaminants.
5. What are some ways to remedy water in a crawl space?
A) Install a new gutter that slopes down and away from the house OR a sump pump
B) Add more insulation
C) Seal all vents completely
D) Install a dehumidifier only
2|P a g e SUCCESS!!!
,Correct Answer: A
Proper drainage through gutters directing water away and sump pumps for active water removal are effective
moisture control strategies.
6. Are there ventilation standards in crawl spaces for subterranean termites?
A) Yes
B) No
Correct Answer: B
There is no ventilation requirement specifically for subterranean termite control in Georgia crawlspaces.
7. Are there ventilation standards in crawl spaces for wood-destroying beetles and fungi?
A) Yes
B) No
Correct Answer: A
Ventilation standards apply for the control and prevention of wood-destroying beetles and wood decay fungi.
8. All ventilation materials (vents, vapor barriers, etc.) must meet the standard of which code?
A) National Electrical Code
B) International Building Code
C) Uniform Plumbing Code
D) Fire Code
3|P a g e SUCCESS!!!
, Correct Answer: B
Ventilation materials in crawlspaces must meet the standards of the International Building Code.
9. How thick should your vapor barrier be?
A) 1-2 mm
B) 4-6 mm
C) 8-10 mm
D) 12 mm or thicker
Correct Answer: B
A Class 1 vapor barrier must be 4–6 mm thick to effectively control moisture.
10. What minimum percentage of crawlspace soil must be covered by a Class 1 vapor barrier for treatment
standards?
A) 50%
B) 60%
C) 70%
D) 90%
Correct Answer: C
At least 70% of the soil in the crawlspace must be covered by a Class 1 vapor barrier (4-6 mm) to meet treatment
standards.
11. If conducive conditions are discovered within how many days of treatment, must the PMP return and
remedy issues free of charge?
A) 30 days
4|P a g e SUCCESS!!!
WDO CATEGORY UPDATED ACTUAL EXAM
QUESTIONS AND CORRECT ANSWERS WITH
RATIONALES (100% VERIFIED) | NEWEST VERSION
2026 | ALREADY GRADED A+
SECTION 1: CRAWLSPACES & MOISTURE CONTROL (Questions 1–35)
1. If you smell a gas leak in a crawlspace, what should you do?
A) Enter quickly to locate the source
B) Open a vent and continue working
C) Don't go in or get out
D) Call your supervisor before exiting
Correct Answer: C
Safety is the highest priority. If you smell gas in a crawlspace, do not enter—evacuate immediately and notify
emergency services.
2. What safety equipment (PPE) should you wear when in crawlspaces?
A) Safety glasses only
B) Bump cap, coveralls, safety glasses, respirator, and knee pads
C) Steel-toe boots and gloves
D) Hard hat and goggles only
Correct Answer: B
1|P a g e SUCCESS!!!
,PPE for crawlspaces includes a bump cap, coveralls, safety glasses, a respirator, and knee pads to protect against
physical hazards, contaminants, and pests.
3. Why is excess moisture in crawl spaces such a big concern for customers?
A) It causes cosmetic damage only
B) It facilitates an environment for pests that can cause structural and health concerns
C) It increases energy costs
D) It makes the space harder to access
Correct Answer: B
Excess moisture creates conditions favorable for wood-destroying organisms and mold, leading to structural
damage and potential health issues for occupants.
4. True or False: Do customers breathe the air from the crawlspace?
A) True
B) False
Correct Answer: A
Air from the crawlspace can enter the living space through the stack effect, potentially carrying mold spores,
allergens, and other contaminants.
5. What are some ways to remedy water in a crawl space?
A) Install a new gutter that slopes down and away from the house OR a sump pump
B) Add more insulation
C) Seal all vents completely
D) Install a dehumidifier only
2|P a g e SUCCESS!!!
,Correct Answer: A
Proper drainage through gutters directing water away and sump pumps for active water removal are effective
moisture control strategies.
6. Are there ventilation standards in crawl spaces for subterranean termites?
A) Yes
B) No
Correct Answer: B
There is no ventilation requirement specifically for subterranean termite control in Georgia crawlspaces.
7. Are there ventilation standards in crawl spaces for wood-destroying beetles and fungi?
A) Yes
B) No
Correct Answer: A
Ventilation standards apply for the control and prevention of wood-destroying beetles and wood decay fungi.
8. All ventilation materials (vents, vapor barriers, etc.) must meet the standard of which code?
A) National Electrical Code
B) International Building Code
C) Uniform Plumbing Code
D) Fire Code
3|P a g e SUCCESS!!!
, Correct Answer: B
Ventilation materials in crawlspaces must meet the standards of the International Building Code.
9. How thick should your vapor barrier be?
A) 1-2 mm
B) 4-6 mm
C) 8-10 mm
D) 12 mm or thicker
Correct Answer: B
A Class 1 vapor barrier must be 4–6 mm thick to effectively control moisture.
10. What minimum percentage of crawlspace soil must be covered by a Class 1 vapor barrier for treatment
standards?
A) 50%
B) 60%
C) 70%
D) 90%
Correct Answer: C
At least 70% of the soil in the crawlspace must be covered by a Class 1 vapor barrier (4-6 mm) to meet treatment
standards.
11. If conducive conditions are discovered within how many days of treatment, must the PMP return and
remedy issues free of charge?
A) 30 days
4|P a g e SUCCESS!!!
