IICRC - APPLIED STRUCTURAL
DRYING 2025 UPDATED
QUESTIONS WITH ANSWERS
(VERIFIED ANSWERS) ALREADY
GRADED A+
Commonly called an air scrubber or negative air machine if airborne particles need
to be reduced, you could use an appropriately installed _______ ________
________ - CORRECT ANSWER>>>>Air Filtration Device (ADF)
AFD - CORRECT ANSWER>>>>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) - CORRECT ANSWER>>>>Assembly Construction
water originates from a sanitary source and does not pose substantial risk for
dermal, ingestion, inhalation, or exposure. Uncontaminated and routinely cleaned -
CORRECT ANSWER>>>>Category 1
water contains significant contamination and has the potential to cause discomfort
or sickness if contacted or consumed by humans - CORRECT
ANSWER>>>>Category 2
water is grossly contaminated and can contain pathogenic, toxigenic, or other
harmful agents - CORRECT ANSWER>>>>Category 3
Category 3 - CORRECT ANSWER>>>>Sewage Back Up
Category 1 - CORRECT ANSWER>>>>Clean water supply line
Least amount of water absorption and evaporation load - Wet porous materials -
water loss is less then 5% of the area - CORRECT ANSWER>>>>Class 1
Significant amount of water absorption and evaporation load - water intrusion
where wet represents 5% - 40% of the area. - CORRECT ANSWER>>>>Class 2
, greatest amount of water absorption and evaporation load. Water intrusion where
wet represents over 40% of the area - CORRECT ANSWER>>>>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. - CORRECT
ANSWER>>>>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. - CORRECT ANSWER>>>>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. - CORRECT
ANSWER>>>>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 - CORRECT ANSWER>>>>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 - CORRECT
ANSWER>>>>Desiccant dehumidifier
High humidity outside air could affect the drying climate adversely due to
______________ - CORRECT ANSWER>>>>Infiltration
Favors that affect the detailed dehumidifier calculation is: - CORRECT
ANSWER>>>>1. Tightness of the building envelope
2. Prevailing weather
3. HVAC
4. Class of Water
5. Building Construction
5. Build out density
DRYING 2025 UPDATED
QUESTIONS WITH ANSWERS
(VERIFIED ANSWERS) ALREADY
GRADED A+
Commonly called an air scrubber or negative air machine if airborne particles need
to be reduced, you could use an appropriately installed _______ ________
________ - CORRECT ANSWER>>>>Air Filtration Device (ADF)
AFD - CORRECT ANSWER>>>>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) - CORRECT ANSWER>>>>Assembly Construction
water originates from a sanitary source and does not pose substantial risk for
dermal, ingestion, inhalation, or exposure. Uncontaminated and routinely cleaned -
CORRECT ANSWER>>>>Category 1
water contains significant contamination and has the potential to cause discomfort
or sickness if contacted or consumed by humans - CORRECT
ANSWER>>>>Category 2
water is grossly contaminated and can contain pathogenic, toxigenic, or other
harmful agents - CORRECT ANSWER>>>>Category 3
Category 3 - CORRECT ANSWER>>>>Sewage Back Up
Category 1 - CORRECT ANSWER>>>>Clean water supply line
Least amount of water absorption and evaporation load - Wet porous materials -
water loss is less then 5% of the area - CORRECT ANSWER>>>>Class 1
Significant amount of water absorption and evaporation load - water intrusion
where wet represents 5% - 40% of the area. - CORRECT ANSWER>>>>Class 2
, greatest amount of water absorption and evaporation load. Water intrusion where
wet represents over 40% of the area - CORRECT ANSWER>>>>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. - CORRECT
ANSWER>>>>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. - CORRECT ANSWER>>>>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. - CORRECT
ANSWER>>>>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 - CORRECT ANSWER>>>>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 - CORRECT
ANSWER>>>>Desiccant dehumidifier
High humidity outside air could affect the drying climate adversely due to
______________ - CORRECT ANSWER>>>>Infiltration
Favors that affect the detailed dehumidifier calculation is: - CORRECT
ANSWER>>>>1. Tightness of the building envelope
2. Prevailing weather
3. HVAC
4. Class of Water
5. Building Construction
5. Build out density
