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IICRC Water Restoration (WRT) Certification Exam
2025 | WRT Certification Exam | All Questions and
Correct Answers | Verified Answers
If a material is not drying well what would be the most effective method of increasing evaporation ---------CORRECT ANSWER-----------------warm the material Inspections are more consistent when the overall goals are kept in mind --------- CORRECT ANSWER-----------------monitor daily in most circumstances how wet items are use the same meters in the same locations each day determine if wet items are drying determine it affected items are dry or done Cupping will generally be the first indication of abnormal moisture levels in hardwood flooring as the bottom and sides of the board absorb moisture --------- CORRECT ANSWER-----------------cupping in hardwood is not permanent damage and should be dried in most cases What are the most effective methods of drying wet wood under hard surfaces is -- -------CORRECT ANSWER-----------------heated air flow Relative humidity is defined as the amount of moisture contained in the air as compared to ---------CORRECT ANSWER-----------------the maximum amount the air could hold that temperature
In the restorative drying industry the weight measurement used to measure water vapor in air is ---------CORRECT ANSWER-----------------grains per pound of air abbreviated as gpp What is gpp called ---------CORRECT ANSWER-----------------the humidity ratio What is the dew point ---------CORRECT ANSWER-----------------the temperature at which air becomes saturated with moisture Vapor or can hold no more water vapor When air is cooled its capacity for water is reduced eventually if temperature is cooled enough the relative humidity will reach ---------CORRECT ANSWER------------ -----100% or saturation when this occurs the air has reached its dew point temperature What is vapor pressure ---------CORRECT ANSWER-----------------the force exerted by a liquid or gas on the surrounding environment The greater the weight of water vapor the greater the water pressure there for vapor pressure dewpoint and humidity ratio are ---------CORRECT ANSWER---------- -------directly related to each other
The numerical value from a moisture meter can be documented and used to monitor progress for this reason the amount of moisture absorbed by semi Power Structural Materials is measured most accurately with a moisture ---------CORRECT ANSWER-----------------moisture meter not a moisture sensor 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 ---------CORRECT ANSWER-----------------ceramic tile and vinyl floor coverings A thermo hygrometer is used to monitor any air that can influence the --------- CORRECT ANSWER-----------------temperature and humidity within a restorative drying environment After physically removing excess water the time required to dry wet materials is influenced most by the ---------CORRECT ANSWER-----------------rate of evaporation As the water is rapidly evaporated the vapor water is removed by ---------CORRECT ANSWER-----------------dehumidification or ventilation As moisture evaporates from a wet material the surface of the material becomes - --------CORRECT ANSWER-----------------cooler because energy is released from the material
Condensation occurs when a vapor changes to a ---------CORRECT ANSWER---------- -------liquid occurs as energy is removed Freeze drying sublimation is typically used with valuable saturated books and documents books and documents saturated with clean water maybe restorable if ---------CORRECT ANSWER-----------------Frozen or dried as quickly as possible When the air temperature increases it can hold ---------CORRECT ANSWER----------- ------more water vapor Evaporation will increase when ---------CORRECT ANSWER-----------------what materials are warmed dryer air is used air is moved rapidly across a wet surface What is the most critical course of action in restorative drying ---------CORRECT ANSWER-----------------to respond quickly What is the standard care for water restoration professionals developed by the restoration industry entitled ---------CORRECT ANSWER-----------------IICRC S
after safety concerns have been addressed and the initial water source has been stopped the restore must complete an evaluation of the waters migration through the structure during this process to restore inspects all ---------CORRECT ANSWER-----------------potentially affected areas the ultimate goal is to find the edge of water migration which moves in a three- dimensional path through the structure this is accomplished across carpeted surfaces using a ---------CORRECT ANSWER-----------------moisture sensor and across most hard surfaces using a moisture meter non-penetrating moisture meter water from a clean source with no substantial risk of causing sickness or discomfort is said to be ---------CORRECT ANSWER-----------------category 1 clean water what are the has a significant degree of chemical biological and or physical contamination is ---------CORRECT ANSWER-----------------Category 2 when water intrusion results from a grossly unsanitary Source or carries --------- CORRECT ANSWER-----------------pathogenic disease causing agents it is said to be Category 3
worker and occupant health and safety are the first priority on every sewage loss areas affected by Category 3 water intrusion are marked and posted as potentially hazardous ---------CORRECT ANSWER----------------- when resistance is encountered and Performing proper services in a category 3 water loss becomes a challenge restores ---------CORRECT ANSWER----------------- stop work immediately and prevent liability losses where regulated or hazardous materials have contaminated the structure are considered ---------CORRECT ANSWER-----------------special situations Third Party Experts are commonly referred to as indoor environmental professionals or IEPs ---------CORRECT ANSWER----------------- pre-existing conditions should be identified documented and communicated to all ---------CORRECT ANSWER-----------------materially interested parties during the initial inspection when carpet delamination the loss of Integrity in the adhesives used to laminate the primary and secondary backing has occurred further damage is very likely for this reason when extensive carpet delamination is discovered ignitions must call it to the attention of all materially interested parties document the condition and --- ------CORRECT ANSWER-----------------replacement
various cleaning and decontamination procedures must be used on Category 3 water losses including the removal of all ---------CORRECT ANSWER----------------- porous materials affected by water intrusion mini building materials will absorb excess water vapor and suffer damage especially when the air is allowed to remain above ---------CORRECT ANSWER------- ----------60% relative humidity abide by local laws and regulations when disposing extracted water ways water is best disposed of into a sanitary sewer ---------CORRECT ANSWER----------------- the primary goal of the initial extraction of the affected area is to contain further - --------CORRECT ANSWER-----------------migration of water within the structure whenever a carpet must be disengaged from the topless strip a ---------CORRECT ANSWER-----------------knee kicker and carpet all must be used if the carpet is to be reinstalled technician should avoid cutting carpet seams unless it is absolutely ---------CORRECT ANSWER-----------------necessary
how many gallons of water are present in a basement that measures 30 x 25 where water is standing at a depth of 6 ft 9 in ---------CORRECT ANSWER-------------- ---37867. the most effective way to speed up the drying process is to remove as much of the water in the liquid state as possible during ---------CORRECT ANSWER------------- ----extraction face pore extraction will significantly slow the drying process every cubic foot of standing water present in a structure contains ---------CORRECT ANSWER-----------------7.48 gallons each gallon of water weighs ---------CORRECT ANSWER-----------------8.34 lb there are three levels of biocidal activity according to the Environmental Protection Agency ---------CORRECT ANSWER-----------------sanitizer disinfectant sterilizer elevating the temperature of a material will ---------CORRECT ANSWER----------------
- increase the vapor pressure associated with the moisture in the material
Plasticity plastic laminate flooring is made of ---------CORRECT ANSWER--------------- --MDF and has a resin saturated appearance layer normally removed in water restoration due to its construction and installation components when ceilings are affected drying procedures are similar to wall drying if the ceiling is sagging or otherwise damaged wet drywall is drained removed and discarded ---------CORRECT ANSWER----------------- turn the drying process jip rocks original strength is restored in fact it will normally be slightly stronger than before wetting ---------CORRECT ANSWER---------
specific types of secondary damage associate with contents are typically --------- CORRECT ANSWER-----------------swelling staining color transfer delamination of surface finish material in structures where the surface on the wall is covered with a non-permeable surface it may be necessary to remove base molding drill holes and introduce air movement ---------CORRECT ANSWER----------------- air flow in the wall cavity increases the rate of evaporation and allows the wall to drive from both inside and out ---------CORRECT ANSWER-----------------
remove the vinyl flooring and discard it is underlayment is saturated and or damaged vinyl is a vapor barrier and time required to dry underlayment will be dramatically reduced if the vinyl is removed ---------CORRECT ANSWER----------------
partial floating of the carpet can be a way to achieve drying of all surfaces simultaneously keeps ambient or warm dry air in contact with wet flooring --------- CORRECT ANSWER----------------- class 1 ---------CORRECT ANSWER-----------------intrusions involve only a part of an area or involve a larger area that is only being lately affected Class 2 ---------CORRECT ANSWER-----------------what are intrusions involve damage to significant areas of carpet and cushion includes wet carpet cushion and water wicking up gypboard wallboard class 3 ---------CORRECT ANSWER-----------------what are intrusions involve entire areas of carpet and underlay that are wet together with wet walls structure and insulation moisture wicking up or water coming down from above class 4 ---------CORRECT ANSWER-----------------water intrusion results in a specialty drying situation water has saturated deeply into the materials and is held is bound
conventional refrigerant dehumidifiers under normal temperatures are effective in reducing high humidity to a normal level approximately 40% RH or about 55 gpp ---------CORRECT ANSWER----------------- LGR will continue to remove significant water vapor down 34 gpp ---------CORRECT ANSWER----------------- because desiccant dehumidifiers do not use condensation to remove water they are not limited by the low dew point temperatures therefore they produce the lowest vapor pressure of any dehumidifier ---------CORRECT ANSWER----------------- when's the next been determined that the floor can be salvaged by in place drying the first step is to determine a dry standard for the hardwood and subfloor --------- CORRECT ANSWER----------------- equilibrium moisture content ---------CORRECT ANSWER-----------------is the dry standard hardwood and sub surfaces are within two to four percentage points of normal equilibrium moisture content dry standard ---------CORRECT ANSWER-----------------
subsurface is below hardwood are dried two within two to four percentage points of the hardwood ---------CORRECT ANSWER----------------- after wood flooring has been dried to acceptable moisture content appropriate acclimation time should be allowed before refinishing ---------CORRECT ANSWER---
moisture documentation of restoration work should include each of the following components ---------CORRECT ANSWER-----------------record of moisture content moisture map a diagram or sketch indicating the boundaries and moisture levels of the affected area and record of drying conditions or humidity record the best way to prevent odors and retard microbial growth in a wet structure is to ensure that all materials are dried thoroughly and rapidly ---------CORRECT ANSWER----------------- as mold grows it can produce a toxic chemical substance all mold rated toxins are referred to as ---------CORRECT ANSWER-----------------mycotoxins when the presence of mold is suspected it is important to communicate with all parties and use appropriate ---------CORRECT ANSWER-----------------protective measures
moisture content ---------CORRECT ANSWER-----------------moisture content is the amount weight of moisture in a material compared to its oven-dried weight expressed as a percentage dry standard ---------CORRECT ANSWER-----------------I'm waste your reading a pain from a known unaffected sample that allows the restore to set up drying goals for the affected structure and contents made from the same material evaporation will increase ---------CORRECT ANSWER-----------------what materials are made warmer dryer air is used and when air is move more rapidly across a wet surface evaporation.... liquid changing to a vapor ---------CORRECT ANSWER----------------- condensation is vapor changing to a liquid ---------CORRECT ANSWER----------------- sublimation is a solid changing to a vapor without going through the liquid phase occurs when solid water is exposed to a vacuum in a freeze drying chamber commonly known as freeze drying ---------CORRECT ANSWER-----------------
key numbers ---------CORRECT ANSWER-----------------14 cubic feet of air equals 1 lb of air 7000 grains equals 1 lb one gallon of water equals 8.34 pounds and 1 cubic foot of water equals 7.48 gallons humidity ratio ---------CORRECT ANSWER-----------------the weight of water in a given weight of air measured in gpp has been referred to as specific humidity enthalpy ---------CORRECT ANSWER-----------------the measurement of energy of the air in the environment it is measured in BTUs per pound of air permeance ---------CORRECT ANSWER-----------------the ability for water vapor to move diffuse through a material is expressed as the materials permeance or permeability Vapor diffusion ---------CORRECT ANSWER-----------------the process by which water moves through permeable materials what document dictates the standards for the water damage restoration industry? ---------CORRECT ANSWER-----------------IICRC S500 Ansi water Damage standards
