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IICRC - Applied Structural Drying Exam Questions and Answers
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IICRC - Applied Structural Drying Exam Questions and Answers Air Filtration Device (ADF) - 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 - ANSWER-...

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  • November 4, 2024
  • 18
  • 2024/2025
  • Exam (elaborations)
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Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024




IICRC - Applied Structural Drying Exam

Questions and Answers


Air Filtration Device (ADF) - 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 - ANSWER✔✔-AFD


Assembly Construction - 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 - 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 - ANSWER✔✔-water contains significant contamination and has the potential to cause

discomfort or sickness if contacted or consumed by humans


Category 3 - ANSWER✔✔-water is grossly contaminated and can contain pathogenic, toxigenic, or other

harmful agents


Sewage Back Up - ANSWER✔✔-Category 3


Clean water supply line - ANSWER✔✔-Category 1


Class 1 - ANSWER✔✔-Least amount of water absorption and evaporation load - Wet porous materials -

water loss is less then 5% of the area


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Class 2 - ANSWER✔✔-Significant amount of water absorption and evaporation load - water intrusion

where wet represents 5% - 40% of the area.


Class 3 - ANSWER✔✔-greatest amount of water absorption and evaporation load. Water intrusion where

wet represents over 40% of the area


Class 4 - 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 - 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 - 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 - 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 - 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



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Infiltration - 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 - ANSWER✔✔-Favors that affect the detailed dehumidifier calculation is:


Detailed Dehumidification Calculation - 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 - 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 - ANSWER✔✔-Dry standard + (Dry standard x 10%) = ____________________


Why does demolition occur - 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


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