IICRC Water Restoration (WRT)
Exam Key: Essential Concepts
And Procedures With Complete
Solutions
What shall a restorer make the first priority during the initial inspection process? -
ANSWER-Conducting hazard assessment
When should water damage restoration services begin? - ANSWER-After a restorer
entered into a properly written contract
Which term describes the rate of water vapor passing through a material? - ANSWER-
Permeance
Who should a technician get documented authorization from before applying an
antimicrobial? - ANSWER-The owner or occupant
What should a restorer ask if cellulosic insulation becomes wet? - ANSWER-Remove
insulation then dry the structure
What do moisture detection instruments allow a restorer to evaluate and document? -
ANSWER-Psychrometric conditions and moisture content or level readings
Which class of water intrusion is it where the affected materials represent between ~5%
to ~40% of the combined surface area? - ANSWER-Class 2
What is recommended to minimize or control airborne contaminants during restoration?
- ANSWER-Install Air Filtration Devices (AFDs)
Which material loses most of its structural integrity when wet but regains its strength
when dry? - ANSWER-Gypsum board (drywall)
In addition to controlling humidity, what else should a restorer manage to increase the
rate of drying? - ANSWER-Surface temperatures of affected materials
What happens when the surface temperature of a material is at or below the dew point
temperature of the air? - ANSWER-Condensation
, Which is typically a result of introducing warm, dry air movement into wall cavities? -
ANSWER-Increased rate of evaporation
Why does drying affected materials behind vinyl wallpaper create a challenge? -
ANSWER-The vinyl wallpaper is a vapor barrier/retarder
What does a restorer need to know to determine the initial dehumidification capacity
recommendation? - ANSWER-Cubic footage of the affected area, class of water, and
type of dehumidifier
Which product is designed to eliminate the targeted organisms but not necessarily the
spores? - ANSWER-A disinfectant
What is the atmospheric condition with the lowest humidity ratio? - ANSWER-40°F (4°C)
and 80% RH
Typically, what can cause delamination when carpet is wet? - ANSWER-Improper
handling and disengaging
What documentation should the restorer use to support that drying goals were met upon
completion of the job? - ANSWER-Moisture content on level records, a moisture map,
and drying conditions
Which tool should be used to measure the moisture content of building materials? -
ANSWER-A moisture meter
What should a restorer do when a carpet is affected by category 3 water and a
materially interested party disagrees with removal? - ANSWER-Stop work until the
conflict has been resolved
What is the term for the force exerted by water molecules in the air on surrounding
surfaces? - ANSWER-Vapor pressure
Which documents should be obtained for a water mitigation project? - ANSWER-
Document to validate the drying and completion
In order to increase the rate of evaporation what should the surface temperature of the
material be? - ANSWER-Above dew point temperature
What two tools are used to properly disengage most stretched-in carpet? - ANSWER-
Knee kicker and carpet awl
Where should a restorer inspect in a water-damaged structure? - ANSWER-All
potentially affected areas
Exam Key: Essential Concepts
And Procedures With Complete
Solutions
What shall a restorer make the first priority during the initial inspection process? -
ANSWER-Conducting hazard assessment
When should water damage restoration services begin? - ANSWER-After a restorer
entered into a properly written contract
Which term describes the rate of water vapor passing through a material? - ANSWER-
Permeance
Who should a technician get documented authorization from before applying an
antimicrobial? - ANSWER-The owner or occupant
What should a restorer ask if cellulosic insulation becomes wet? - ANSWER-Remove
insulation then dry the structure
What do moisture detection instruments allow a restorer to evaluate and document? -
ANSWER-Psychrometric conditions and moisture content or level readings
Which class of water intrusion is it where the affected materials represent between ~5%
to ~40% of the combined surface area? - ANSWER-Class 2
What is recommended to minimize or control airborne contaminants during restoration?
- ANSWER-Install Air Filtration Devices (AFDs)
Which material loses most of its structural integrity when wet but regains its strength
when dry? - ANSWER-Gypsum board (drywall)
In addition to controlling humidity, what else should a restorer manage to increase the
rate of drying? - ANSWER-Surface temperatures of affected materials
What happens when the surface temperature of a material is at or below the dew point
temperature of the air? - ANSWER-Condensation
, Which is typically a result of introducing warm, dry air movement into wall cavities? -
ANSWER-Increased rate of evaporation
Why does drying affected materials behind vinyl wallpaper create a challenge? -
ANSWER-The vinyl wallpaper is a vapor barrier/retarder
What does a restorer need to know to determine the initial dehumidification capacity
recommendation? - ANSWER-Cubic footage of the affected area, class of water, and
type of dehumidifier
Which product is designed to eliminate the targeted organisms but not necessarily the
spores? - ANSWER-A disinfectant
What is the atmospheric condition with the lowest humidity ratio? - ANSWER-40°F (4°C)
and 80% RH
Typically, what can cause delamination when carpet is wet? - ANSWER-Improper
handling and disengaging
What documentation should the restorer use to support that drying goals were met upon
completion of the job? - ANSWER-Moisture content on level records, a moisture map,
and drying conditions
Which tool should be used to measure the moisture content of building materials? -
ANSWER-A moisture meter
What should a restorer do when a carpet is affected by category 3 water and a
materially interested party disagrees with removal? - ANSWER-Stop work until the
conflict has been resolved
What is the term for the force exerted by water molecules in the air on surrounding
surfaces? - ANSWER-Vapor pressure
Which documents should be obtained for a water mitigation project? - ANSWER-
Document to validate the drying and completion
In order to increase the rate of evaporation what should the surface temperature of the
material be? - ANSWER-Above dew point temperature
What two tools are used to properly disengage most stretched-in carpet? - ANSWER-
Knee kicker and carpet awl
Where should a restorer inspect in a water-damaged structure? - ANSWER-All
potentially affected areas
