IICRC - Applied Structural Drying Exam
Questions With Correct Answers
Commonly called an air scrubber or negative air machine if airborne particles need to be
reduced, you could use an appropriately installed _______ ________ ________ - verified
answers; Air Filtration Device (ADF)
AFD - verified answers; Air Filtration Device
Prior to determining the best drying system for affected materials, restorers should identify
and understand the assembly construction (ie wall assembly, floor assembly) - verified
answers; Assembly Construction
water originates from a sanitary source and does not pose substantial risk for dermal,
ingestion, inhalation, or exposure. Uncontaminated and routinely cleaned - verified answers;
Category 1
water contains significant contamination and has the potential to cause discomfort or
sickness if contacted or consumed by humans - verified answers; Category 2
water is grossly contaminated and can contain pathogenic, toxigenic, or other harmful agents
- verified answers; Category 3
Category 3 - verified answers; Sewage Back Up
Category 1 - verified answers; Clean water supply line
,Least amount of water absorption and evaporation load - Wet porous materials - water loss is
less then 5% of the area - verified answers; Class 1
Significant amount of water absorption and evaporation load - water intrusion where wet
represents 5% - 40% of the area. - verified answers; Class 2
greatest amount of water absorption and evaporation load. Water intrusion where wet
represents over 40% of the area - verified answers; Class 3
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. - verified answers; Class 4
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.
- verified answers; Closed drying system
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. - verified answers; Conventual refrigerant dehumidifier
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 - verified answers; Combination Drying System
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 - verified answers; Desiccant dehumidifier
, High humidity outside air could affect the drying climate adversely due to ______________ -
verified answers; Infiltration
Favors that affect the detailed dehumidifier calculation is: - verified answers; 1. Tightness of
the building envelope
2. Prevailing weather
3. HVAC
4. Class of Water
5. Building Construction
5. Build out density
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 - verified answers; Detailed
Dehumidification Calculation
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. - verified answers; Dry Standards
Dry standard + (Dry standard x 10%) = ____________________ - verified answers; Drying Goal
Calculation
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
Questions With Correct Answers
Commonly called an air scrubber or negative air machine if airborne particles need to be
reduced, you could use an appropriately installed _______ ________ ________ - verified
answers; Air Filtration Device (ADF)
AFD - verified answers; Air Filtration Device
Prior to determining the best drying system for affected materials, restorers should identify
and understand the assembly construction (ie wall assembly, floor assembly) - verified
answers; Assembly Construction
water originates from a sanitary source and does not pose substantial risk for dermal,
ingestion, inhalation, or exposure. Uncontaminated and routinely cleaned - verified answers;
Category 1
water contains significant contamination and has the potential to cause discomfort or
sickness if contacted or consumed by humans - verified answers; Category 2
water is grossly contaminated and can contain pathogenic, toxigenic, or other harmful agents
- verified answers; Category 3
Category 3 - verified answers; Sewage Back Up
Category 1 - verified answers; Clean water supply line
,Least amount of water absorption and evaporation load - Wet porous materials - water loss is
less then 5% of the area - verified answers; Class 1
Significant amount of water absorption and evaporation load - water intrusion where wet
represents 5% - 40% of the area. - verified answers; Class 2
greatest amount of water absorption and evaporation load. Water intrusion where wet
represents over 40% of the area - verified answers; Class 3
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. - verified answers; Class 4
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.
- verified answers; Closed drying system
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. - verified answers; Conventual refrigerant dehumidifier
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 - verified answers; Combination Drying System
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 - verified answers; Desiccant dehumidifier
, High humidity outside air could affect the drying climate adversely due to ______________ -
verified answers; Infiltration
Favors that affect the detailed dehumidifier calculation is: - verified answers; 1. Tightness of
the building envelope
2. Prevailing weather
3. HVAC
4. Class of Water
5. Building Construction
5. Build out density
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 - verified answers; Detailed
Dehumidification Calculation
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. - verified answers; Dry Standards
Dry standard + (Dry standard x 10%) = ____________________ - verified answers; Drying Goal
Calculation
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
