IICRC Applied Structural Drying Verified
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Practice questions for this set
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Terms in this set (130)
Air Filtration Device (ADF) 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 AFD
,Assembly Construction 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 water originates from a sanitary source and does
not pose substantial risk for dermal, ingestion,
inhalation, or exposure. Uncontaminated and
routinely cleaned
Category 2 water contains significant contamination and has
the potential to cause discomfort or sickness if
contacted or consumed by humans
Category 3 water is grossly contaminated and can contain
pathogenic, toxigenic, or other harmful agents
Sewage Back Up Category 3
Clean water supply line Category 1
Class 1 Least amount of water absorption and evaporation
load - Wet porous materials - water loss is less then
5% of the area
Class 2 Significant amount of water absorption and
evaporation load - water intrusion where wet
represents 5% - 40% of the area.
Class 3 greatest amount of water absorption and
evaporation load. Water intrusion where wet
represents over 40% of the area
, Class 4 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 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 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 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
Desiccant dehumidifier Removes water vapor from the air through
absorption. Usually requires more amperage as
compared to refrigerant dehumidifier. Desiccants
create the lowest vapor pressure which work best
on low porosity materials. When a desiccant dehu
is drawing outside air and ducting processed air
inside a building it can create positive pressure in
the building. To improve desiccant dehu
performance, it may be beneficial to pre-cool the
desiccants air intake
Questions And Answers 2025 Latest Solutions
Save
Practice questions for this set
Learn 1 /7 Study with Learn
Terms in this set (130)
Air Filtration Device (ADF) 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 AFD
,Assembly Construction 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 water originates from a sanitary source and does
not pose substantial risk for dermal, ingestion,
inhalation, or exposure. Uncontaminated and
routinely cleaned
Category 2 water contains significant contamination and has
the potential to cause discomfort or sickness if
contacted or consumed by humans
Category 3 water is grossly contaminated and can contain
pathogenic, toxigenic, or other harmful agents
Sewage Back Up Category 3
Clean water supply line Category 1
Class 1 Least amount of water absorption and evaporation
load - Wet porous materials - water loss is less then
5% of the area
Class 2 Significant amount of water absorption and
evaporation load - water intrusion where wet
represents 5% - 40% of the area.
Class 3 greatest amount of water absorption and
evaporation load. Water intrusion where wet
represents over 40% of the area
, Class 4 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 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 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 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
Desiccant dehumidifier Removes water vapor from the air through
absorption. Usually requires more amperage as
compared to refrigerant dehumidifier. Desiccants
create the lowest vapor pressure which work best
on low porosity materials. When a desiccant dehu
is drawing outside air and ducting processed air
inside a building it can create positive pressure in
the building. To improve desiccant dehu
performance, it may be beneficial to pre-cool the
desiccants air intake
