Download WTR IICRC Exam (2025/2026 New Update) Questions and Verified Answers and more Exams Water and Wastewater Engineering in PDF only on Docsity!
WTR IICRC Exam (202 5 / 2026 New Update)
Questions and Verified Answers| 100%
Correct| Graded A
QUESTION
whenever a chemical antimicrobial or biocide is used restorers must follow the label explicitly Answer: directions
QUESTION
most antimicrobials require that the area of application be vacated by and pets during application and or a period of time after application. Answer: occupants
QUESTION
- The label is the law" get customer briefing before starting any antimicrobial / biocide treatment. Answer:
QUESTION
establishing is the best way to set restorative dying goals. A dry standard is established by obtaining a moisture reading using an material Answer: dry standard , unaffected
QUESTION
the numerical value from a moisture meter can be documented and used to monitor progress, for this reason, the amount of moisture absorbed by semiporus structural materials is measured most accurately with a moisture not a moister sensor. Answer: meter
QUESTION
because of their non-invasive nature and quick surveying capabilities, non-invasive meters are the most effective tools for locating abnormal moisture behind and beneath finishing materials such as and resilient floor coverings. Answer: ceramic tile , vinyl
QUESTION
a thermo hygrometer is used to monitor any air that can influence the and or within a restorative drying environment. Answer: temperature , humidity (relative humidity)
QUESTION
to evaluate the progress of structural drying projects, restorers should measure: moisture in being dried (moisture content readings ) being used to dry affected materials (psychrometric readings) produced by mechanical systems (dehumidifiers) Answer: materials
occurs when liquid changes to a vapor. occurs as energy is increased Answer: evaporation
QUESTION
As moisture evaporates from a wet material, the surface of the material becomes because energy is released from the material. Answer: cooler
QUESTION
. occurs when vapor changes to a liquid. occurs as energy is removed Answer: condensation
QUESTION
occurs when a solid changes to a vapor( without going through a liquid phase.) Answer: sublimation
QUESTION
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 or dried
QUESTION
is defined as the amount of moisture contained in an air sample as compared to the maximum amount the air could hold at the temperature. Answer: relative humidity
QUESTION
when the air temperature increases , it can hold water vapor Answer: more
QUESTION
In the restorative drying industry the weight measurement used to measure water vapor in air is grains per pound of air, abbreviated as GPP. This is called Answer: humidity ratio
QUESTION
which of these surface temperatures would prompt the most rapid evaporations? 60 degrees 70 degrees 80 degrees Answer: 80
QUESTION
72 F
QUESTION
is the temperature at which air becomes saturated with moisture and can hold no more water vapor Answer: dew point
QUESTION
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 point
QUESTION
if surfaces are then the dew point of the surrounding air, water will condense on those surfaces and possibly cause secondary damage. if surfaces are then the dew point of the surrounding air, evaporation can occur. Answer: cooler warmer
QUESTION
is the force exerted by a gas (vapor molecules) on the surrounding environment. Answer: vapor pressure
QUESTION
vapor pressure, dew point, and humidity ratio (GPP) are directly related to each other. when one increases the other two. when one decreases the other two. Answer: increase decrease
QUESTION
water vapor pressure is the force that drives higher convention of humidity from one space to another in an attempt to seek with lower concentration of water vapor. Answer: equilibrium
QUESTION
the ability for water vapor to diffuse through a solid material is expressed as the materials Answer: permeance
QUESTION
Third party experts are commonly referred to as Indoor Environmental Professionals, or. Answer: IEP
QUESTION
Losses where regulated or hazardous materials have contaminated the structure do not change the of water.
QUESTION
Hygroscopic materials gain and lose moisture continually in an effort to with the water content in the surrounding air mass. The more hygroscopic the material, the faster it will collect water vapor, and the easier it will suffer damage. Answer: equalize and secondary
QUESTION
When water intrusion results in water running through wall cavities, inspection access holes are used to ensure that blown-in insulation has not compacted and lost its. Wet compressed insulation should be Answer: R-Value , removed
QUESTION
the most effective way to speed the drying process is to remove as much of the water in a liquid state as possible during the phase (for example multiple extractions.) poor extractions will significant slow the drying process. Answer: extractions
QUESTION
Abide by local and regulations when disposing extracted water. Waste water is best disposed of into a sanitary sewer. Answer: laws
QUESTION
the primary goal of the initial extraction of the affected area is to contain further of the water within the structure. Answer: migration
QUESTION
Whenever carpet must be disengaged from the tackless strip, a and carpet awl must be used. Answer: knee kicker
QUESTION
the majority of cushion has a skin or mesh on the top side. the purpose of this skin is to ease during installation: it is not a vapor barrier Answer: carpet stretching
QUESTION
If carpet is to be re-installed, technicians should avoid cutting carpet seams unless it is absolutely Answer: necessary
QUESTION
how many gallons of water are presenting a basement that measures 30' x 25' where water is standing at a depth of 6'9"
open , closed or combination - how to decide? Answer: is the outside air humidity ratio lower? no : use closed drying yes: is the outside air warmer than 70 F? no: may use combination drying yes: is the security, weather, customer preference agreeable to open drying? no: use closed drying yes: can use open drying
QUESTION
if open drying is determined appropriate, the following options (while keeping building security in mind) are available to the restorer Answer:
- using ventilation
- open windows
- install fans to create pressure differentials & air exchange
QUESTION
drying systems merge the benefit of both open and closed drying: the use of available dry air from outside and the control offered by a closed system and mechanical dehumidification Answer: combination
QUESTION
Elevating the temperature of a material will increase the associated with the moisture in the material. Answer:
vapor pressure
QUESTION
if the surface temperature of the material is higher than the temperature of the surrounding air , evaporation may occur. Answer: dew point
QUESTION
which of these surfaces temperature would have the fastest rate of evaporation? 10 degree below dew point 20 degree above dew point 30 degree above dew point Answer: 30
QUESTION
class 1 water intrusions involve the amount of water absorption, with less than % of the area surface being wet porous materials. Answer: least , 5%
QUESTION
class 2 water intrusions involve a amount of water absorption, with more than but less than of are surface being wet porous materials Answer: significant 5%-40%
QUESTION
dehumidification reduces the content of the air Answer: moisture
QUESTION
A balanced drying system is achieved when the rate of dehumidification is greater than or equal to the rate of. Answer: evaporation
QUESTION
If the rate of evaporation is allowed to exceed the rate of dehumidification, can occur. Answer: secondary damage
QUESTION
Refrigerant dehumidifiers remove water from the air through the process of because of this fact, they are more efficient in higher humidity conditions. refrigerants dehumidifiers work best between 70 Degrees and 90 degrees F Answer: condensation
QUESTION
LGRs produce lower than conventional refrigerants and continue to remove significant water vapor down to GPP Answer: vapor pressure 34 GPP
QUESTION
Because desiccant dehumidifiers do not use condensation to remove water, they are not limited by low dew point temperatures; therefore, they produce the lowest of any dehumidifier. Answer: vapor pressure
QUESTION
if a structure had affected air at 85 F at 65% RH the most efficient type of dehumidification to use would be a Answer: refrigerant
QUESTION
if a structure had affected air at 75 F at 25% RH the most efficient type of air dehumidifier to use would be Answer: desiccant
QUESTION
if a structure cannnot be warmed to a temperature where LGRs would be effective the most efficient type of dehumidifiers to use would be:
Answer: bottom
QUESTION
Cupping in hardwood is not damage, and should be dried in most cases. Answer: permanent
QUESTION
represents the "was-wood" material with the least engineering , and thus the most natural fiber bonding. it is to swelling and delimitation due to its wood veneer assemblies which are glued under extreme pressure. Answer: plywood , resistant
QUESTION
wet particle board would normally be Answer: removed and replaced
QUESTION
plastic laminate flooring is made if MDF and has a resin saturated appearance layer. normally in water restoration due to its construction and installation components Answer: removed
QUESTION
Remove the vinyl (flooring) and discard it if the is saturated and/or damaged; vinyl is a vapor barrier and the time required to dry underlayment will be dramatically reduced if the vinyl is removed. Answer: underlayment
QUESTION
partial flooring of carpet can be a way to achieve drying of all surfaces simultaneously and allows dry air to have more contact with wet flooring. Answer: warm
QUESTION
During the drying process all of the gypsums original strength is restored. in fact the dried gypsum will normally be slightly then before wetting. Answer: stronger
QUESTION
in structures where the surface of the wall is covered with a non- surface as a vapor barrier, it may be necessary to remove base molding drill holes and introduce air movement. Answer: permeable
QUESTION
Airflow in the wall cavity increases the rate of and allows the wall to dry from both inside and out.
