CPR Fire, Smoke & Water Damage Remediation 2 — Questions and Answers
Question 1: Which class of fire extinguisher is appropriate for energized electrical equipment fires?
- Class A
- Class B
- Class C (Correct answer)
- Class D
Correct answer: Class C
Class C extinguishers use non-conductive agents safe for energized electrical equipment fires.
Question 2: What is 'pyrolysis' in the context of fire damage?
- Thermal decomposition of materials without oxygen (Correct answer)
- Oxidation of metals from heat exposure
- The spread of fire through convection currents
- Combustion of accelerants at flashpoint
Correct answer: Thermal decomposition of materials without oxygen
Pyrolysis is the chemical decomposition of organic materials through heat in the absence of oxygen, leaving residues that complicate cleaning.
Question 3: During water damage restoration, what does the term 'Category 3' water indicate?
- Clean water from a supply line break
- Water with significant contamination from non-sanitary sources
- Gray water with minor biological contaminants
- Grossly contaminated water carrying pathogens (Correct answer)
Correct answer: Grossly contaminated water carrying pathogens
Category 3 is grossly contaminated water (also called black water) that may carry pathogenic agents, sewage, or toxins.
Question 4: What is the primary purpose of hydroxyl generators in odor remediation after a fire?
- To filter particulates from the air using HEPA technology
- To generate hydroxyl radicals that oxidize and destroy odor molecules (Correct answer)
- To seal smoke residues into surfaces before painting
- To dehumidify the structure and reduce moisture levels
Correct answer: To generate hydroxyl radicals that oxidize and destroy odor molecules
Hydroxyl generators produce hydroxyl radicals that chemically react with and neutralize malodorous compounds in the air and on surfaces.
Question 5: In the IICRC S500 standard, a Class 4 water damage situation is characterized by:
- Only surface wetting of carpet and pad
- Significant saturation of walls and subfloors
- Water in cavities with low permeance materials (Correct answer)
- Full saturation of concrete slabs and crawlspaces
Correct answer: Water in cavities with low permeance materials
Class 4 involves water trapped in low permeance materials like hardwood, plaster, or concrete requiring specialty drying methods.
Question 6: When restoring a structure after smoke damage, 'thermal fogging' works by:
- Lowering the temperature of smoke-affected surfaces to halt oxidation
- Atomizing a deodorant chemical that penetrates porous surfaces similarly to smoke (Correct answer)
- Using ultrasonic vibration to dislodge smoke particles from surfaces
- Sealing smoke residues under a clear sealant applied via heat gun
Correct answer: Atomizing a deodorant chemical that penetrates porous surfaces similarly to smoke
Thermal fogging vaporizes a deodorant solution that penetrates the same pathways smoke did, neutralizing odor at the source.
Question 7: Which type of smoke residue is most commonly associated with high-oxygen, fast-burning fires fueled by natural materials?
- Wet smoke residue
- Dry smoke residue (Correct answer)
- Protein smoke residue
- Fuel oil soot residue
Correct answer: Dry smoke residue
Dry smoke residue is a dry, powdery, non-smeary residue produced by fast-burning, high-temperature fires with natural fuel sources.
CPR Fire, Smoke & Water Damage Remediation 2
Which class of fire extinguisher is appropriate for energized electrical equipment fires?