CPR Contents Cleaning & Decontamination Processes 3 — Questions and Answers
Question 1: Which chemical classification describes cleaning agents that have a pH above 7 and are effective at breaking down greasy soot deposits?
- Acidic cleaners
- Neutral cleaners
- Alkaline cleaners (Correct answer)
- Solvent-based cleaners
Correct answer: Alkaline cleaners
Alkaline cleaners have a high pH that effectively saponifies and emulsifies oily soot and smoke residue for easier removal.
Question 2: When performing dry cleaning of smoke-damaged documents, which tool is most commonly used first?
- HEPA vacuum with soft brush attachment
- Dry chemical sponge (Correct answer)
- Compressed air canister
- Lint roller
Correct answer: Dry chemical sponge
Dry chemical sponges (also called chemical sponges or dry soot sponges) are used first to lift loose soot from surfaces like paper without smearing.
Question 3: In the context of contents cleaning, 'thermal fogging' is best described as:
- A cooling technique to prevent heat damage during cleaning
- A process that vaporizes deodorizing solvent to penetrate affected areas (Correct answer)
- A steam cleaning method for upholstered items
- A condensation technique to loosen smoke residue
Correct answer: A process that vaporizes deodorizing solvent to penetrate affected areas
Thermal fogging vaporizes a deodorizing solvent using heat, allowing the particles to penetrate surfaces and neutralize embedded odor molecules.
Question 4: What is the recommended approach for artwork and documents affected by Category 1 water damage when restoration is the goal?
- Freeze-drying to stabilize and restore the items (Correct answer)
- Sun-drying to avoid mold growth
- Lamination to preserve moisture-damaged surfaces
- Immediate low-heat oven drying
Correct answer: Freeze-drying to stabilize and restore the items
Freeze-drying (lyophilization) is the preferred technique for stabilizing and restoring wet documents and artwork by removing moisture through sublimation without further damage.
Question 5: A restorer finds metal items with rust forming after water damage. What type of cleaning agent is appropriate to address corrosion on steel tools?
- Alkaline degreaser
- Mildly acidic rust remover (Correct answer)
- Enzyme-based cleaner
- Quaternary ammonium disinfectant
Correct answer: Mildly acidic rust remover
Mildly acidic rust removers react chemically with iron oxide (rust) to dissolve corrosion from metal surfaces without damaging the base metal when used correctly.
Question 6: Which factor most significantly determines whether smoke-damaged clothing can be successfully restored?
- The color of the fabric
- The type and duration of smoke exposure (Correct answer)
- The country of manufacture
- The size of the garment
Correct answer: The type and duration of smoke exposure
The type of fire (wet smoke vs. dry smoke) and how long the fabric was exposed directly affects whether odors and residue can be fully removed.
Question 7: What does 'wet smoke residue' indicate about the fire conditions that produced it?
- The fire burned at very high temperatures with fast combustion
- The fire burned at low heat with smoldering, incomplete combustion (Correct answer)
- Water was used to extinguish the fire
- The fire occurred in a humid environment
Correct answer: The fire burned at low heat with smoldering, incomplete combustion
Wet smoke is produced by slow-burning, low-heat fires with incomplete combustion, resulting in sticky, smearable residue with strong odors that is difficult to clean.
CPR Contents Cleaning & Decontamination Processes 3
Which chemical classification describes cleaning agents that have a pH above 7 and are effective at breaking down greasy soot deposits?