Download IICRC WRT Water Damage Restoration Technician (WRT) certification exam LATEST 2025 EXAM and more Exams Water and Wastewater Engineering in PDF only on Docsity!
IICRC WRT Water Damage Restoration
Technician (WRT) certification exam LATEST
2025 EXAM 200 QUESTIONS 100% VERIFIED
ANSI/IICRC S500 Standards Guaranteed
Pass A
Cleaning procedures must be employed before the drying of a Category 2 water loss can continue. At a minimum, affected ______ ________ (or pad) must be removed and disposed of, and carpet must be throughly cleaned using hot water extraction method. carpet underlay When water intrusion results from a grossly unsanitary source or carries __________ (disease causing) agents, it is said to be Category 3. pathogenic Workers and occupant ______ and safety are the first priority on every sewage loss. Areas affected by Category 3 water intrusion are marked and posted as potentially hazardous. health
Various cleaning and decontamination procedures must be used on Category 3 water losses, including the removal of all ______ ______ materials affected by the water intrusion. highly porous When resistance is encountered and performing proper services in a Category 3 water loss becomes a challenge, restorers ____ ____ immediately to prevent liability and address the conflict. stop work Third party experts are commonly referred to as Indoor Environmental Professionals, or ____. IEPs Losses where regulated or hazardous materials have contaminated the structure do not change the _______ of water. category
- Improper removal from tack strip
- Improper floating of carpet
- Excessive wear
- Pet damage Many building materials will absorb excess water vapor and suffer damage, especially when air is allowed to remain above __% relative humidity. 60 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. equalize & secondary When water intrusion results in water running through wall cavities, inspection access holes are used to ensure that blow-in insulation has not compacted and lost its _-_____. R-Value
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 extraction will significantly slow the drying process. extraction Abide by local ____ and regulations when disposing extracted water. Waste water is best disposed of into a sanitary sewer. laws The primary goal of the initial extraction of the affected area is to contain further _________ of the water within the structure. migration Whenever carpet must be disengaged from the tackless strip, a ____ ______ and carpet awl must be used. knee kicker
Whenever a chemical antimicrobial or biocide is used, restorers must follow the label __________ explicitly. directions Most antimicrobials require that the area of application be vacated by _________ and pets during application and for a period fo time after application. occupants Establishing a ___ ________ is the best way to set restorative drying goals. A dry standard is established by obtaining a moisture reading using an __________ material. dry standard & unaffected The numerical value form a moisture meter can be documented and used to monitor progress. for this reason, the amount of moisture absorbed by semi-porous structural materials is measured most accurately with a moisture _____, not a moisture sensor. meter
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. ceramic tile & vinyl A thermo-hygrometer is used to monitor any air that can influence the ___________ and/or ________ ________ with a restorative drying environment. temperature & relative humidity The most critical course of action in restorative drying is to _______ ______ and begin __________ as soon as possible. respond quickly & mitigation All restorers should follow the standard of care for the water restoration profession developed by the restoration industry entitled the IICRC ____. S To help protect technicians from the many hazards associated with contaminated water losses, restorers need to have ready access to several items. These items protect for all _________ _________ to the body. potential exposures
After safety concerns have been addressed and the initial water source has been stopped, the restorer must complete an evaluation of the water's migration through the structure. During this process, the restorer inspects all ___________ ________ areas. potentially affected The ultimate goal is to find the "edge" of water migration, which moves in a three-dimensional path throughout the structure. This is accomplished across carpeted surfaces using a ________ ______, and across most hard surfaces using a ___-________ (non-penetrating) moisture meter. moisture sensor & non-invasive Water from a clean source with no substantial risk of causing sickness of discomfort is said to be ________ _ water. Category 1 Water that has a significant degree of chemical, biological, and/or physical contamination and a potential to cause sickness or discomfort is ________ _. Category 2
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) materials, air, & air Evaporation will increase when:
- Wet materials are made warmer.
- When drier air is used.
- When air is moved more rapidly across the wet surface. After excess water has been extracted, the time needed to dry wet materials is determined by the ____ __ ___________. rate of evaporation
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. Frozen & dried ________ ________ 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. Relative humidity (RH) When the air temperature increases, it can hold ____ water vapor. more 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 ________ _____. humidity ration
Which of these surface temperatures would promote the most rapid evaporation? A. 60 degrees B. 70 degrees C. 80 degrees C. 80 degrees 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 B. Warm the material One of the most effective methods of drying wet wood under hard surfaces is: A. Heated airflow B. Demolition of the wood
Vapor pressure Vapor pressure, dew point, and humidity ration (GPP) are ________ _______ to each other. When one increases, the other two ________. When one decreases, the other two ________. directly related, increase, & decrease Water vapor pressure is the force that drives higher concentrations of humidity from one space to another in an attempt to seek ___________ with lower concentrations of water vapor. equilibrium The ability for water vapor to diffuse through a solid material is expressed as the materials _________. permeance 3 drying systems:
- Open- intentionally using outdoor air
- Closed- using mechanical dehumidification only
- Combination- using outdoor air combined with mechanical dehumidification If open drying is determined appropriate, the following options are available to the restorer:
- Using ventilation
- Opening windows
- Install fans to create pressure differentials and air exchanges ___________ drying systems merge the benefits 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. Combination Elevating the temperature of a material will increase the _____ ________ associated with the moisture in the material. vapor pressure If the surface temperature of the material is higher than the ___ point temperature of the surrounding air, evaporation may occur.
Class 3 water intrusions involve the ________ amount of water absorption, with more than __% of area surfaces being wet porous materials. greatest & 40 Wet materials present in a Class 4 water intrusion require a ______ time to dry. Water has saturated deeply into the materials and is held or trapped as bound water. Low evaporation materials have ___________ absorption water. longer &significant Restorers must maintain their safety certified equipment properly. This includes replacing _____ that are damaged, replacing damaged inlet and outlet _______, and checking for _______ electrical plugs. cords, screens, & damaged Install _ air mover for each ________ area before you calculate additional air movers for the square feet of surfaces and for room offsets. 1 & affected Dehumidification reduces the ________ content of the air.
moisture A balanced drying system is achieved when the rate of dehumidification is greater than or equal to the rate of ___________. evaporation If the rate of evaporation is allowed to exceed the rate of dehumidification, _________ ______ can occur. secondary damage Refrigerant dehumidifiers remove water form the air through the process of ____________. Because of this fact, they are more efficient in higher humidity conditions. Refrigerant dehumidifiers work best between __ degrees and __ degrees. condensation, 70, & 90 Conventional refrigerant dehumidifiers under normal temperatures are effective in reducing high humidity to a normal level - approximately 40% RH, or about __ GPP. 55
