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IICRC - APPLIED STRUCTURAL DRYING
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IICRC - APPLIED STRUCTURAL DRYING
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IICRC - APPLIED STRUCTURAL DRYINGAir Filtration Device (ADF) - Answers -Commonly called an air scrubber or negative air
machine if airborne particles need to be reduced, you could use an appropriately
installed _______ ________ ________
Air Filtration Device - Answers -AFD
Assembly Construction - Answers -Prior to determining the best drying system for
affected materials, restorers should identify and understand the assembly construction
(ie wall assembly, floor assembly)
Category 1 - Answers -water originates from a sanitary source and does not pose
substantial risk for dermal, ingestion, inhalation, or exposure. Uncontaminated and
routinely cleaned
Category 2 - Answers -water contains significant contamination and has the potential to
cause discomfort or sickness if contacted or consumed by humans
Category 3 - Answers -water is grossly contaminated and can contain pathogenic,
toxigenic, or other harmful agents
Sewage Back Up - Answers -Category 3
Clean water supply line - Answers -Category 1
Class 1 - Answers -Least amount of water absorption and evaporation load - Wet
porous materials - water loss is less then 5% of the area
Class 2 - Answers -Significant amount of water absorption and evaporation load - water
intrusion where wet represents 5% - 40% of the area.
Class 3 - Answers -greatest amount of water absorption and evaporation load. Water
intrusion where wet represents over 40% of the area
Class 4 - Answers -deeply held or bound water. Significant amount of water absorption
into low evaporation materials. Drying may require special drying methods, longer
drying time, or substantial water vapor pressure differentials.
Closed drying system - Answers -Uses mechanical dehumidification and is not open to
outside air. Used if there are security issues, the outside air is not conductive to drying
or when access to outside air is not possible.
Conventual refrigerant dehumidifier - Answers -Removes water vapor from the air by
lowering the temperature of the incoming air to below dew point and causing the water
, to condense on the coils. Cold and hot surfaces created with gases inside a closed coil
system.
Combination Drying System - Answers -uses some outdoor air with dehumidifiers to
accelerate the drying process. This can include periodically venting (flushing) the
structure, using negative pressure or using small openings to the outside
Temperature - Answers -To decrease drying time of wet materials, restorers can
increase the __________ of moisture in the materials. This accelerates the water
molecules to make them move to the air.
Tuesday - Answers -The day with the greatest vapor pressure differential between air
and material was
Monday - Surface Vapor Pressure: .90 Air Vapor Pressure: .73 = Monday Vapor
Pressure Differential: .17
Tuesday- Surface Vapor Pressure: 1.51 Air Vapor Pressure: .55 = Tuesday Vapor
Pressure Differential: .96
Wednesday- Surface Vapor Pressure: 1.04 Air Vapor Pressure: .31 = Wednesday
Vapor Pressure Differential: .73
Coldest Dew Point - Answers -In the driest environments, we'll find _______?
High Temperatures - Answers -The IICRC S500 Water Damage Restoration Standard
mentions the following concerns: ______________ ___________ may have
weakending or destructive effects on the structural integrity or physical makeup of
building materials and contents. Restores should be aware of any instructions or safety
recommendations from manufactures of heating devices to protect occupant safety and
avoid fire hazards
Desiccant Dehumidifiers - Answers -Use chemicals that readily absorb moisture.
These machines operate with temperatures ranging from -10°F - 140°F and can remove
moisture from air where the humidity ratio is as low as 5 gpp
This one dehumidifier can work below 32°F
Colder and Dryer - Answers -The ____________ & _________ the intake air is the
more efficiently a desiccant operates
Positive Pressure - Answers -When a desiccant dehumidifier is drawing outside air and
ducting processed air inside a building it can create ____________ ___________ in the
building.
Convection
Conduction
Radiation - Answers -Heat flows from areas of warm temperatures to areas of cool
temperature in the absence of other factors. The greater the temperature difference
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