IICRC MRS MOLD REMEDIATION TEST
GUIDE QUESTIONS AND ANSWERS.
VERIFIED 2025/2026.
To prevent cross-contamination- Containment is critical in preventing the spread of mold spores
to unaffected areas, thus managing cross-contamination. - ANS Containment
Negative pressure of 0.05 inches of water column - ANS Pressure differential during
remediation
6-mil polyethylene sheeting - ANS Containment barrier material
High-efficiency particulate air (HEPA) filtering - ANS Airborne spores control method
Gently cutting and removing to minimize dust - ANS Best practice for removing contaminated
materials
Throughout the project - ANS Air monitoring timing
P100 respirator - ANS Recommended respirator for mold removal
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Household detergent, Vinegar, Sodium hypochlorite (bleach). While household detergent and
vinegar have some efficacy, sodium hypochlorite is widely used due to its effectiveness against
mold, although it should be used properly. - ANS Effective cleaning agents against mold
Humidity control - ANS Critical factor to prevent mold growth in water-damaged buildings
Removal and disposal - Porous materials such as carpets can trap mold spores and are often
best removed and replaced. - ANS Strategy for managing mold on porous materials
To prevent external pollutants from entering:Establishing negative air pressure prevents
external pollutants and mold spores from entering the containment area, protecting the
cleanup effort. - ANS Significance of establishing negative air pressure in containment
High levels of UV light - High levels of UV light are not an indicator of mold infestation, whereas
visible mold, musty odors, and water stains are consistent signs. - ANS Non-indicator of mold
infestation
Negative pressure containment - Negative pressure containment effectively manages larger
areas and keeps mold spores contained during remediation. - ANS Containment system for
larger remediation projects
It reduces humidity to inhibit mold growth - Dehumidifiers reduce humidity levels, inhibiting the
growth of mold by providing a less favorable environment. - ANS Role of a dehumidifier in
remediation
When physical removal is impractical - Bio-remediation uses microbial action to break down
complex mold spores when physical removal is challenging. - ANS Scenario for employing bio-
remediation
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
GUIDE QUESTIONS AND ANSWERS.
VERIFIED 2025/2026.
To prevent cross-contamination- Containment is critical in preventing the spread of mold spores
to unaffected areas, thus managing cross-contamination. - ANS Containment
Negative pressure of 0.05 inches of water column - ANS Pressure differential during
remediation
6-mil polyethylene sheeting - ANS Containment barrier material
High-efficiency particulate air (HEPA) filtering - ANS Airborne spores control method
Gently cutting and removing to minimize dust - ANS Best practice for removing contaminated
materials
Throughout the project - ANS Air monitoring timing
P100 respirator - ANS Recommended respirator for mold removal
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Household detergent, Vinegar, Sodium hypochlorite (bleach). While household detergent and
vinegar have some efficacy, sodium hypochlorite is widely used due to its effectiveness against
mold, although it should be used properly. - ANS Effective cleaning agents against mold
Humidity control - ANS Critical factor to prevent mold growth in water-damaged buildings
Removal and disposal - Porous materials such as carpets can trap mold spores and are often
best removed and replaced. - ANS Strategy for managing mold on porous materials
To prevent external pollutants from entering:Establishing negative air pressure prevents
external pollutants and mold spores from entering the containment area, protecting the
cleanup effort. - ANS Significance of establishing negative air pressure in containment
High levels of UV light - High levels of UV light are not an indicator of mold infestation, whereas
visible mold, musty odors, and water stains are consistent signs. - ANS Non-indicator of mold
infestation
Negative pressure containment - Negative pressure containment effectively manages larger
areas and keeps mold spores contained during remediation. - ANS Containment system for
larger remediation projects
It reduces humidity to inhibit mold growth - Dehumidifiers reduce humidity levels, inhibiting the
growth of mold by providing a less favorable environment. - ANS Role of a dehumidifier in
remediation
When physical removal is impractical - Bio-remediation uses microbial action to break down
complex mold spores when physical removal is challenging. - ANS Scenario for employing bio-
remediation
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
