IICRC
MRS
COMPLETE TEST GUIDE
©2024/2025
,1. What is the primary purpose of using containment during
mold remediation?
- A) To increase work speed
- B) To prevent cross-contamination
- C) To lower remediation costs
- D) To enhance aesthetic appearance
- Correct Answer: B
- Rationale: Containment is critical in preventing the spread of
mold spores to unaffected areas, thus managing cross-
contamination.
2. Which pressure differential is typically required between the
containment area and the surrounding environment during
remediation?
- A) Negative pressure of 0.02 inches of water column
- B) Positive pressure of 0.05 inches of water column
- C) Zero pressure
- D) Negative pressure of 0.05 inches of water column
- Correct Answer: D
©2024/2025
, - Rationale: A negative pressure of 0.05 inches of water
column helps ensure that air moves into the containment area,
preventing mold spores from escaping.
3. Which of the following materials is most appropriate for
building a containment barrier?
- A) Standard drywall
- B) 6-mil polyethylene sheeting
- C) Cardboard
- D) Wood panels
- Correct Answer: B
- Rationale: 6-mil polyethylene sheeting is durable and
provides an effective barrier against mold spores.
4. To effectively control airborne spores during remediation,
which method is typically employed?
- A) Manual sweeping
- B) High-efficiency particulate air (HEPA) filtering
- C) Standard vacuuming
- D) Air conditioning
- Correct Answer: B
- Rationale: HEPA filtering effectively captures 99.97% of
particles that are 0.3 microns or larger, including mold spores.
©2024/2025
MRS
COMPLETE TEST GUIDE
©2024/2025
,1. What is the primary purpose of using containment during
mold remediation?
- A) To increase work speed
- B) To prevent cross-contamination
- C) To lower remediation costs
- D) To enhance aesthetic appearance
- Correct Answer: B
- Rationale: Containment is critical in preventing the spread of
mold spores to unaffected areas, thus managing cross-
contamination.
2. Which pressure differential is typically required between the
containment area and the surrounding environment during
remediation?
- A) Negative pressure of 0.02 inches of water column
- B) Positive pressure of 0.05 inches of water column
- C) Zero pressure
- D) Negative pressure of 0.05 inches of water column
- Correct Answer: D
©2024/2025
, - Rationale: A negative pressure of 0.05 inches of water
column helps ensure that air moves into the containment area,
preventing mold spores from escaping.
3. Which of the following materials is most appropriate for
building a containment barrier?
- A) Standard drywall
- B) 6-mil polyethylene sheeting
- C) Cardboard
- D) Wood panels
- Correct Answer: B
- Rationale: 6-mil polyethylene sheeting is durable and
provides an effective barrier against mold spores.
4. To effectively control airborne spores during remediation,
which method is typically employed?
- A) Manual sweeping
- B) High-efficiency particulate air (HEPA) filtering
- C) Standard vacuuming
- D) Air conditioning
- Correct Answer: B
- Rationale: HEPA filtering effectively captures 99.97% of
particles that are 0.3 microns or larger, including mold spores.
©2024/2025
