IICRC - Applied Structural Drying Study
Guide Test.
Air Filtration Device (ADF) - CORRECT ANSWER 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 - CORRECT ANSWER AFD
Assembly Construction - CORRECT ANSWER 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 - CORRECT ANSWER water originates from a sanitary source and does not pose substantial
risk for dermal, ingestion, inhalation, or exposure. Uncontaminated and routinely cleaned
Category 2 - CORRECT ANSWER water contains significant contamination and has the potential to cause
discomfort or sickness if contacted or consumed by humans
Category 3 - CORRECT ANSWER water is grossly contaminated and can contain pathogenic, toxigenic, or
other harmful agents
Sewage Back Up - CORRECT ANSWER Category 3
Clean water supply line - CORRECT ANSWER Category 1
Class 1 - CORRECT ANSWER Least amount of water absorption and evaporation load - Wet porous
materials - water loss is less then 5% of the area
,Class 2 - CORRECT ANSWER Significant amount of water absorption and evaporation load - water
intrusion where wet represents 5% - 40% of the area.
Class 3 - CORRECT ANSWER greatest amount of water absorption and evaporation load. Water intrusion
where wet represents over 40% of the area
Class 4 - CORRECT ANSWER 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 - CORRECT ANSWER 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 - CORRECT ANSWER 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 - CORRECT ANSWER 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 - CORRECT ANSWER 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
Infiltration - CORRECT ANSWER High humidity outside air could affect the drying climate adversely due
to ______________
1. Tightness of the building envelope
2. Prevailing weather
3. HVAC
, 4. Class of Water
5. Building Construction
5. Build out density - CORRECT ANSWER Favors that affect the detailed dehumidifier calculation is:
Detailed Dehumidification Calculation - CORRECT ANSWER See Chart:
Cubic Feet : Divided by 70 = Base Pints per day
Multiply the 5 multipliers together: Build out density x building construction x class of water x HVAC x
Weather Impact = Multiplier
Multiply Base Pints per day x Multiplier = Adjusted Pints Per Day
Dry Standards - CORRECT ANSWER The unaffected material readings are called ______ ______. You
know you can use this as your drying goal. Your drying goal is this plus 10% of it.
Drying Goal Calculation - CORRECT ANSWER Dry standard + (Dry standard x 10%) =
____________________
Why does demolition occur - CORRECT ANSWER 1. Removing Materials to eliminate safety hazards
2. Removing materials that have suffered primary damage and are not restorable
3. Removing porous materials that are holding odor
5. Removing vapor barriers to assist with drying efforts
6. Removing materials to reduce drying time
7. Removing materials to open cavities or areas to provide additional needed services
Useful for adjuster, or notes on xactimate line items
Recommendation Calculation - CORRECT ANSWER Step 1: Install One air mover in each affected Room
Step 2: Add one air mover for every 50-70 square feet of affected wet floor in each room
Step 3. Add one air mover for every 100 - 150 square feet of affected wet ceiling and wall areas above
approximately 24"
Step 4: Add one air mover for each wall inset and offset greater than 18"
Guide Test.
Air Filtration Device (ADF) - CORRECT ANSWER 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 - CORRECT ANSWER AFD
Assembly Construction - CORRECT ANSWER 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 - CORRECT ANSWER water originates from a sanitary source and does not pose substantial
risk for dermal, ingestion, inhalation, or exposure. Uncontaminated and routinely cleaned
Category 2 - CORRECT ANSWER water contains significant contamination and has the potential to cause
discomfort or sickness if contacted or consumed by humans
Category 3 - CORRECT ANSWER water is grossly contaminated and can contain pathogenic, toxigenic, or
other harmful agents
Sewage Back Up - CORRECT ANSWER Category 3
Clean water supply line - CORRECT ANSWER Category 1
Class 1 - CORRECT ANSWER Least amount of water absorption and evaporation load - Wet porous
materials - water loss is less then 5% of the area
,Class 2 - CORRECT ANSWER Significant amount of water absorption and evaporation load - water
intrusion where wet represents 5% - 40% of the area.
Class 3 - CORRECT ANSWER greatest amount of water absorption and evaporation load. Water intrusion
where wet represents over 40% of the area
Class 4 - CORRECT ANSWER 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 - CORRECT ANSWER 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 - CORRECT ANSWER 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 - CORRECT ANSWER 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 - CORRECT ANSWER 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
Infiltration - CORRECT ANSWER High humidity outside air could affect the drying climate adversely due
to ______________
1. Tightness of the building envelope
2. Prevailing weather
3. HVAC
, 4. Class of Water
5. Building Construction
5. Build out density - CORRECT ANSWER Favors that affect the detailed dehumidifier calculation is:
Detailed Dehumidification Calculation - CORRECT ANSWER See Chart:
Cubic Feet : Divided by 70 = Base Pints per day
Multiply the 5 multipliers together: Build out density x building construction x class of water x HVAC x
Weather Impact = Multiplier
Multiply Base Pints per day x Multiplier = Adjusted Pints Per Day
Dry Standards - CORRECT ANSWER The unaffected material readings are called ______ ______. You
know you can use this as your drying goal. Your drying goal is this plus 10% of it.
Drying Goal Calculation - CORRECT ANSWER Dry standard + (Dry standard x 10%) =
____________________
Why does demolition occur - CORRECT ANSWER 1. Removing Materials to eliminate safety hazards
2. Removing materials that have suffered primary damage and are not restorable
3. Removing porous materials that are holding odor
5. Removing vapor barriers to assist with drying efforts
6. Removing materials to reduce drying time
7. Removing materials to open cavities or areas to provide additional needed services
Useful for adjuster, or notes on xactimate line items
Recommendation Calculation - CORRECT ANSWER Step 1: Install One air mover in each affected Room
Step 2: Add one air mover for every 50-70 square feet of affected wet floor in each room
Step 3. Add one air mover for every 100 - 150 square feet of affected wet ceiling and wall areas above
approximately 24"
Step 4: Add one air mover for each wall inset and offset greater than 18"
