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| Section | Objectives |
|---|---|
| Topic 1: Water Damage Mitigation | - Protecting structure, furniture and other contents - Stopping secondary damage - Locating the source of water |
| Topic 2: Structural Restoration | |
| Topic 3: Antimicrobial (biocide) Technology | |
| Topic 4: Specialized Experts | |
| Topic 5: Limitations, Complexities, Complications, and Conflicts | |
| Topic 6: Heating, Ventilating, and Air Conditioning (HVAC) Restoration | |
| Topic 7: Safety and Health | |
| Topic 8: Inspections, Preliminary Determinations, and Pre-Restoration Evaluations | |
| Topic 9: Building and Material Science | - Psychrometry and Drying Technology - Equipment, Instruments, and Tools |
| Topic 10: Large or Catastrophic Restoration Projects | |
| Topic 11: Principles of Water Damage Restoration | - Health Effects from Exposure to Microbial Contamination in Water-Damaged Buildings - Microbiology of Water Damage |
| Topic 12: Materials and Assemblies | |
| Topic 13: Contents Evaluation, Restoration, and Remediation | |
| Topic 14: Developing a Scope | - Building materials: Carpet, pad, flooring, sub-flooring, framing, drywall etc. - Drying methods - Determining migration of water - What's wet? - Determine a dry standard and a dry goal - Evaluating class of water loss - Evaluating category of water loss |
| Topic 15: Safety | - Immunizations - Water Damage specific hazards - Personal Protective Equipment (PPE) - Equipment Safety - Identifying potential on-the-job hazards |
| Topic 16: Administrative Procedures, Project Documentation, and Risk Management |
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質問 # 42
What should a restorer do if cellulosic insulation becomes wet?
正解：B
解説：
The IICRC WRT body of knowledge identifiescellulosic insulationas a material that must beremoved and discarded when wet. Cellulose insulation is highly absorbent and loses its insulating properties once saturated. It also retains moisture for extended periods, creating conditions conducive to microbial growth and secondary damage.
The WRT manual explains that wet cellulose insulation cannot be effectively dried in place due to its density and the way it traps moisture within wall cavities. Attempting to dry or clean it is unreliable and inconsistent with professional standards. Removal allows the wall cavity and surrounding materials to dry properly and be inspected for hidden damage.
Evaluating R-value or expansion is irrelevant once the insulation is wet. Reinstallation of new insulation may occur after drying is complete and conditions permit.
This guidance reflects the WRT emphasis on material restorability, moisture control, and prevention of long- term problems within concealed assemblies.
質問 # 43
How shall a technician use government-registered antimicrobials (biocides)?
正解：D
解説：
The IICRC WRT body of knowledge mandates that EPA-registered antimicrobials (biocides) must be used strictly in accordance with the product label directions. Under U.S. law, the label is considered a legal document, and deviation from label instructions constitutes misuse of a pesticide.
Label directions specify approved application methods, dilution ratios, dwell times, PPE requirements, ventilation needs, and occupant restrictions. The WRT manual emphasizes that technicians are not permitted to alter concentrations, combine products, or improvise application techniques, regardless of perceived effectiveness.
Estimating dilution or increasing concentration does not improve efficacy and may create safety hazards, damage materials, or expose occupants and workers to chemical risks. Combining products can produce toxic reactions, while under-dilution or over-dilution may render the antimicrobial ineffective or unsafe.
The WRT curriculum reinforces that antimicrobials are supplemental tools, not replacements for removal of unsalvageable materials or proper drying. Proper use ensures regulatory compliance, protects health, and limits liability for the restorer.
質問 # 44
What type of material is most likely to be affected by secondary damage caused by high humidity?
正解：A
解説：
The IICRC WRT body of knowledge identifieshygroscopic materialsas the most susceptible to secondary damage caused by elevated humidity. Hygroscopic materials readily absorb and release moisture from the surrounding air until they reach equilibrium with ambient relative humidity. Common examples include wood, paper, drywall, textiles, and many composite building materials.
The WRT manual explains that when relative humidity rises-particularly above safe thresholds- hygroscopic materials absorb moisture even without direct water contact. This can lead to swelling, warping, loss of structural integrity, finish failure, corrosion of fasteners, and increased microbial risk. This process is known assecondary damage, because it occurs after the initial water intrusion and is driven by uncontrolled environmental conditions.
Unabsorbent, hydrophobic, and non-porous materials resist moisture absorption and are far less affected by high humidity alone. While condensation may occur on these surfaces, they do not readily absorb moisture into their structure.
Because of this behavior, the WRT curriculum emphasizes aggressive humidity control during drying-not only to dry wet materials but also to protect unaffected hygroscopic materials within the drying chamber.
Monitoring relative humidity and vapor pressure is therefore essential to prevent secondary damage.
質問 # 45
Which term describes the rate of water vapor passing through a material?
正解：A
解説：
The IICRC WRT body of knowledge definespermeanceas the rate at which water vapor passes through a material. It is a measure of a material's vapor transmission characteristics and plays a significant role in drying dynamics and moisture management.
Materials with high permeance allow water vapor to pass through easily, supporting evaporation and drying.
Low-permeance materials act as vapor retarders or barriers, restricting vapor movement and potentially trapping moisture within assemblies.
The WRT manual emphasizes evaluating material permeance when selecting drying methods. For example, vinyl wall coverings or certain flooring systems impede vapor movement, often requiring disruptive drying techniques.
Capillarity and wicking describe liquid moisture movement, while condensation is a phase change process.
Only permeance directly describes vapor transmission through materials, making it the correct term under WRT science.
質問 # 46
Which material loses most of its structural integrity when wet but regains its strength when dry?
正解：C
解説：
Gypsum board (drywall) is identified in the WRT body of knowledge as highly vulnerable to moisture exposure, yet capable of recovering strength when dried-provided it has not sustained irreversible primary damage. The WRT manual explains that gypsum wallboard is among the most moisture-sensitive common building materials, showing rapid and dramatic change with elevated moisture levels. However, it also states that gypsum has a greater ability to recover than many other engineered products.
Critically, the WRT guidance distinguishes between primary damage (immediate structural failure) and recoverable wetting. For example, overhead or horizontally installed gypsum that becomes wet can lose structural integrity, sag, and create a significant safety concern; this sagging is considered permanent damage and requires removal.
In contrast, when gypsum board installed vertically on walls is wet but has not experienced primary damage (e.g., not structurally compromised, not severely deteriorated, and appropriate contamination considerations are addressed), the WRT manual notes that it can restore: during the drying process, gypsum's original strength is restored, and after drying it may even be slightly stronger (though sometimes more brittle). This recovery characteristic is what makes gypsum board the best match to the question's description-losing structural integrity when wet yet regaining strength when properly dried.
This material behavior is central to WRT decision-making: whether to dry in place, perform limited disruption (e.g., baseboard removal and cavity airflow), or remove materials for safety/health reasons. The WRT body of knowledge treats gypsum as potentially restorable depending on installation orientation, degree of damage, and contamination risk, which is why it is specifically described as losing integrity when wet and regaining strength when dry.
質問 # 47
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