CPR Water, Fire & Mold Restoration Techniques 2 — Questions and Answers
Question 1: When using a thermal imaging camera during water damage assessment, what does a darker (cooler) area on a wall typically indicate?
- Dry, well-insulated material
- Moisture trapped within the wall cavity (Correct answer)
- Structural damage from impact
- High ambient temperature behind the wall
Correct answer: Moisture trapped within the wall cavity
Moisture causes evaporative cooling, which appears as a darker, cooler region on thermal imaging cameras during water damage assessment.
Question 2: Which IICRC standard governs the restoration of fire and smoke damage?
- S500
- S520
- S700 (Correct answer)
- S800
Correct answer: S700
The IICRC S700 Standard and Reference Guide for Professional Fire and Smoke Damage Restoration governs fire and smoke restoration practices.
Question 3: During Category 3 (black water) flood restoration, which personal protective equipment is MANDATORY for technicians entering the affected area?
- Safety glasses and gloves only
- N95 respirator and rubber boots
- Full Tyvek suit, gloves, boots, and a minimum N95 respirator (Correct answer)
- Hard hat and steel-toed boots
Correct answer: Full Tyvek suit, gloves, boots, and a minimum N95 respirator
Category 3 water contains grossly unsanitary agents requiring full PPE including a Tyvek suit, gloves, boots, and at minimum an N95 respirator to protect workers.
Question 4: What is the primary purpose of hydroxyl radical generators in fire restoration?
- Killing surface mold spores
- Neutralizing odor molecules through oxidation (Correct answer)
- Drying structural materials faster
- Removing soot from hard surfaces
Correct answer: Neutralizing odor molecules through oxidation
Hydroxyl radical generators oxidize odor-causing molecules at the molecular level, permanently neutralizing smoke and other malodors without harsh chemicals.
Question 5: A restorer discovers mold growth covering 12 square feet of drywall. According to EPA guidelines, how should this remediation be classified?
- Level 1 — small isolated area, no containment needed
- Level 2 — mid-sized area, limited containment recommended (Correct answer)
- Level 3 — requires full containment and PPE
- Level 4 — requires an industrial hygienist to direct work
Correct answer: Level 2 — mid-sized area, limited containment recommended
EPA guidelines classify mold areas between 10 and 30 square feet as Level 2, recommending limited containment and appropriate PPE.
Question 6: Which drying method is most effective for hardwood floors affected by water damage to prevent cupping and crowning?
- Open-air drying with high-velocity fans aimed at the surface
- Mat drying system drawing moisture from beneath the floor (Correct answer)
- Dehumidification alone without directed airflow
- Immediate replacement of all affected boards
Correct answer: Mat drying system drawing moisture from beneath the floor
Mat drying systems apply negative pressure beneath hardwood floors to draw moisture evenly from the subfloor upward, reducing the moisture differential that causes cupping.
Question 7: After a structure fire, when is it appropriate to begin applying sealers to smoke-damaged surfaces?
- Immediately after fire suppression to lock in odors
- Only after thorough cleaning to remove loose soot and residue (Correct answer)
- Before any cleaning to protect the surface
- Sealers are not used in fire restoration
Correct answer: Only after thorough cleaning to remove loose soot and residue
Sealers should only be applied after all loose soot and smoke residue has been thoroughly cleaned, as sealing over contamination traps odors and can cause adhesion failure.
CPR Water, Fire & Mold Restoration Techniques 2
When using a thermal imaging camera during water damage assessment, what does a darker (cooler) area on a wall typically indicate?