Page 1 of 31
IICRC WRT/ASD 2026 EXAM
COMPLETE|CURRENT TESTING QUESTIONS
AND CORRECT VERIFIED ANSWERS|TOP-
RATED A+.
IICRC
Prepare for your IICRC WRT/ASD Exam with this focused study
guide. It covers water damage restoration, structural drying, and
applied scientific drying principles. Perfect for reinforcing
knowledge and boosting exam readiness. Suitable for water
damage restoration technicians and cleaning industry
professionals.
When the air temperature increases, it can hold ____ water
vapor. ✓ ✓ …… ANSWER ….. more
Freeze drying (sublimation) is typically used with valuable
saturated books and documents. Books and documents
saturated with clean water may be restorable if: ______ or
_____ as quickly as possible. ✓ ✓ …… ANSWER …..
frozen; dried
, Page 2 of 31
Evaporation will increase when ✓ ✓ …… ANSWER …..
Wet materials made warmer, drier air is used, when air is
moved more rapidly across wet surface.
Which of these would promote the most rapid evaporation:
a. 60°F b. 70°F c. 80°F ✓ ✓ …… ANSWER ….. c. 80°F
If a material is not drying well, what would be the most
effective method of increasing evaporation? a. Use air
filtration b. Warm the material c. Add more airflow ✓ ✓ ……
ANSWER ….. b. Warm the material
One of the most effective methods of drying wet wood under
hard surfaces: a. Heated airflow b. Warm the materials c.
Add more airflow ✓ ✓ …… ANSWER ….. a. Heated
Airflow
________ ________ is defined as the amount of moisture
contained in an air sample, as compared to the maximum
amount the air could hold at that temperature. ✓ ✓ ……
ANSWER ….. Relative humidity
, Page 3 of 31
In the restorative drying industry the weight measurement
used to measure water vapor air is grains per pound of air,
abbreviated as GPP. This is called ________ _____. ✓ ✓ ……
ANSWER ….. humidity ratio
___ _____ is the temperature at which air becomes saturated
with moisture vapor, or can hold no more water vapor. ✓ ✓
…… ANSWER ….. Dew point
when air is cooled its capacity for water vapor is reduced,
eventually If temperature is cooled enough, the relative
humidity will reach ____% or saturation. when this occurs
the air has reached its ___ point temperature. ✓ ✓ ……
ANSWER ….. 100; dew
if surfaces are ______ than the dew point of the surrounding
air water will condense on those surfaces and possibly
cause secondary damage if surfaces are ______ than the
dew point of the surrounding air evaporation can occur ✓ ✓
…… ANSWER ….. cooler; warmer
, Page 4 of 31
_____ ________ is the force exerted by a gas (vapor
molecules) on the surrounding environment. ✓ ✓ ……
ANSWER ….. Vapor pressure
Vapor pressure, dew point and humidity ratio (GPP) are
________ _______ to each other. When one increases the
other two ________ When one decreases, the other two
________. ✓ ✓ …… ANSWER ….. increase; decrease
Water vapor pressure is the force that drives higher
concentrations of humidity from one space to another in
attempt to seek ___________ with lower concentrations of
water vapor. ✓ ✓ …… ANSWER ….. equilibrium
the ability for water vapor to diffuse through a solid material
is expressed as the materials _________. ✓ ✓ …… ANSWER
….. Permeance
Drying systems [provide name and brief descriptions of
each] ✓ ✓ …… ANSWER ….. Open - intentionally using
outdoor air to lower indoor humidity
Closed - mechanical dehumidification only
IICRC WRT/ASD 2026 EXAM
COMPLETE|CURRENT TESTING QUESTIONS
AND CORRECT VERIFIED ANSWERS|TOP-
RATED A+.
IICRC
Prepare for your IICRC WRT/ASD Exam with this focused study
guide. It covers water damage restoration, structural drying, and
applied scientific drying principles. Perfect for reinforcing
knowledge and boosting exam readiness. Suitable for water
damage restoration technicians and cleaning industry
professionals.
When the air temperature increases, it can hold ____ water
vapor. ✓ ✓ …… ANSWER ….. more
Freeze drying (sublimation) is typically used with valuable
saturated books and documents. Books and documents
saturated with clean water may be restorable if: ______ or
_____ as quickly as possible. ✓ ✓ …… ANSWER …..
frozen; dried
, Page 2 of 31
Evaporation will increase when ✓ ✓ …… ANSWER …..
Wet materials made warmer, drier air is used, when air is
moved more rapidly across wet surface.
Which of these would promote the most rapid evaporation:
a. 60°F b. 70°F c. 80°F ✓ ✓ …… ANSWER ….. c. 80°F
If a material is not drying well, what would be the most
effective method of increasing evaporation? a. Use air
filtration b. Warm the material c. Add more airflow ✓ ✓ ……
ANSWER ….. b. Warm the material
One of the most effective methods of drying wet wood under
hard surfaces: a. Heated airflow b. Warm the materials c.
Add more airflow ✓ ✓ …… ANSWER ….. a. Heated
Airflow
________ ________ is defined as the amount of moisture
contained in an air sample, as compared to the maximum
amount the air could hold at that temperature. ✓ ✓ ……
ANSWER ….. Relative humidity
, Page 3 of 31
In the restorative drying industry the weight measurement
used to measure water vapor air is grains per pound of air,
abbreviated as GPP. This is called ________ _____. ✓ ✓ ……
ANSWER ….. humidity ratio
___ _____ is the temperature at which air becomes saturated
with moisture vapor, or can hold no more water vapor. ✓ ✓
…… ANSWER ….. Dew point
when air is cooled its capacity for water vapor is reduced,
eventually If temperature is cooled enough, the relative
humidity will reach ____% or saturation. when this occurs
the air has reached its ___ point temperature. ✓ ✓ ……
ANSWER ….. 100; dew
if surfaces are ______ than the dew point of the surrounding
air water will condense on those surfaces and possibly
cause secondary damage if surfaces are ______ than the
dew point of the surrounding air evaporation can occur ✓ ✓
…… ANSWER ….. cooler; warmer
, Page 4 of 31
_____ ________ is the force exerted by a gas (vapor
molecules) on the surrounding environment. ✓ ✓ ……
ANSWER ….. Vapor pressure
Vapor pressure, dew point and humidity ratio (GPP) are
________ _______ to each other. When one increases the
other two ________ When one decreases, the other two
________. ✓ ✓ …… ANSWER ….. increase; decrease
Water vapor pressure is the force that drives higher
concentrations of humidity from one space to another in
attempt to seek ___________ with lower concentrations of
water vapor. ✓ ✓ …… ANSWER ….. equilibrium
the ability for water vapor to diffuse through a solid material
is expressed as the materials _________. ✓ ✓ …… ANSWER
….. Permeance
Drying systems [provide name and brief descriptions of
each] ✓ ✓ …… ANSWER ….. Open - intentionally using
outdoor air to lower indoor humidity
Closed - mechanical dehumidification only
