IICRC WATER RESTORATION EXAM 2024 ACTUAL EXAM, Exams of Water and Wastewater Engineering

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P a g e | 1 IICRC WATER RESTORATION EXAM 2024 ACTUAL EXAM COMPLETE 350 QUESTIONS WITH DETAILED VERIFIED ANSWERS (100% CORRECT ANSWERS) ALREADY GRADED A+ what is our first responsibility when arriving at any water loss? - CORRECT ANSWER >>>>Safety name two substances found in construction that are federally regulated: - CORRECT ANSWER >>>>Asbestos and lead painting For safety, with what should all our drying equipment be equipped? - CORRECT ANSWER >>>>ground plug what should we do with equipment that has damaged electrical cords - CORRECT ANSWER >>>>remove from service and replace cords P a g e | 2 where do we dispose of the water we collect on water damage loss? - CORRECT ANSWER >>>>Back into sanitary sewers what must we do before we apply a biocide into a structure - CORRECT ANSWER >>>>advise the occupants and gain permission what is the solution called when it reduces, but does not eliminate germs, produces a healthful condition. - CORRECT ANSWER >>>>sanitizer what is a solution called when it is used to produce a surface absent of life? - CORRECT ANSWER >>>>Sterilizer What must we follow every time we apply a government registered biocide? - CORRECT ANSWER >>>>safety data sheet and label P a g e | 5 what is a category 3 water loss? - CORRECT ANSWER >>>>Grossly contaminated and contains pathogenic agents what is a "special Situation" water loss? - CORRECT ANSWER >>>>lead paint, asbestos or mold When does the carpet cushion always get replaced? - CORRECT ANSWER >>>>Category 2 and 3 water losses. what should you wear on a category 3 water loss? - CORRECT ANSWER >>>>gloves, rubber boots, appropriate gloves, knee pads, hard hat, eye protection, and respiratory protection where should we inspect when conducting our initial inspection? - CORRECT ANSWER >>>>everywhere P a g e | 6 What meters should we use on the initial inspection? - CORRECT ANSWER >>>>non- invasive what tools can we use to determine where the water has migrated in carpet and pad? - CORRECT ANSWER >>>>moisture sensor Do you use meters or sensors to determine if a material is sufficiently dry? - CORRECT ANSWER >>>>meters What meter do we use to detect moisture under sheet vinyl flooring? - CORRECT ANSWER >>>>non-invasive what else can a non-invasive moisture meter be used on? - CORRECT ANSWER >>>>Vinyl and ceramic tile P a g e | 7 how do you know if a material is sufficiently dry? - CORRECT ANSWER >>>>if you have reached your dry standard What meter do we use to measure temperature and humidity? - CORRECT ANSWER >>>>thermo Hygrometer how often should we inspect our restorative drying projects? - CORRECT ANSWER >>>>Daily what does a hardwood floor that is wetter on the bottom than the top look like? - CORRECT ANSWER >>>>cupping when should you establish hardwood floor drying goals? - CORRECT ANSWER >>>>Start of the project how do you know if the hardwood floor is dry enough? - CORRECT ANSWER >>>>when the hardwood is within 2-4% points of the subfloor P a g e | 10 Can we normally dry wet particle board under sheet vinyl? - CORRECT ANSWER >>>>no Drying materials requires us to control two things: - CORRECT ANSWER >>>>evaporation and dehumidification Wet wood sub flooring under stone or tile drying strategy requires: - CORRECT ANSWER >>>>heat and small amounts of air flow can you use this technique above with concrete too? - CORRECT ANSWER >>>>yes what happens to the VP in a material when we heat it - CORRECT ANSWER >>>>it increases Thus, what happens to its potential for evaporation - CORRECT ANSWER >>>>increases P a g e | 11 what happens if the material is cooler than the dew point temperature - CORRECT ANSWER >>>>condensation occurs and evaporation stops vp of material=high; VP of air= low; what will happen? - CORRECT ANSWER >>>>evaporation will occur Review water phase changes. - CORRECT ANSWER >>>>energy defines that state What does hygroscopic mean? - CORRECT ANSWER >>>>Vapor absorbing materials describe some examples of "secondary Damage" - CORRECT ANSWER >>>>mold, delamination of the carpet, damaging wall, breaking something what document dictates the standards for the water damage restoration industry? - CORRECT P a g e | 12 ANSWER >>>>IICRC S500 Ansi water Damage standards what needs to be signed before restoration begins? - CORRECT ANSWER >>>>work authorization what should be indicated on the contract - CORRECT ANSWER >>>>terms of payment and authorization to do the work why do we extract water from carpet multiple times - CORRECT ANSWER >>>>to reduce drying time after the water is extracted, what dictates the rate of drying - CORRECT ANSWER >>>>evaporation What should we do if we find pre-existing damage? - CORRECT ANSWER >>>>Document, take pictures and advise the parties involved P a g e | 15 how do you know if you can use the outdoor air in your drying strategy? - CORRECT ANSWER >>>>if it is warmer than the dew point temperature and is dryer than the inside of the structure what does and air filtration device (AFD) do? - CORRECT ANSWER >>>>removes particulate from the air When can an AFD be used? - CORRECT ANSWER >>>>cat 3 water losses and when occupants are at risk when should an indoor environmental professional (IEP) be used? - CORRECT ANSWER >>>>specialty situations, daycares, seniors homes, etc. "the amount of water vapor mixed with a given volume of dry air" is called: - CORRECT ANSWER >>>>Humidity Ratio P a g e | 16 "the pressure exerted by the water vapor molecules in the air on surrounding surfaces." is called: - CORRECT ANSWER >>>>vapor pressure When the air is at 100% RH, it is also at its: - CORRECT ANSWER >>>>saturation point When vapor passes through a solid material, this is the material's": - CORRECT ANSWER >>>>permeance what does it mean when we say "nature always seeks and equilibrium" - CORRECT ANSWER >>>>areas of high pressure seek areas of low pressure if the outside is "warm and wet" the what conditions would be necessary outside if we were to use the outdoor air to dry the P a g e | 17 structure? - CORRECT ANSWER >>>>warm and dry cat 1 water; 45*F in the house. How would you address the drying - CORRECT ANSWER >>>>raise the temperature when water evaporates, does the surface become cooler or hotter? Why? - CORRECT ANSWER >>>>Cooler- uses the energy from the surface to change to a gas what relative humidity (and Above) can support microbial growth? - CORRECT ANSWER >>>>70% What three pieces of information are on the right hand side of the psychrometry chart? are they related to each other? - CORRECT ANSWER >>>>GPP humidity ratio, dewpoint, and Vapor Pressure P a g e | 20 soon as possible - CORRECT ANSWER >>>>respond quickly & mitigation All restorers should follow the standard of care for the water restoration profession developed by the restoration industry entitled the IICRC ____. - CORRECT ANSWER >>>>s500 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. - CORRECT ANSWER >>>>potential exposures respiratory protection regulations state that the employer must provide - CORRECT ANSWER >>>>1. medical evaluations 2. fit testing 3. training P a g e | 21 the contract clearly states the agreement between the building owner and the restoration contractor. the form specifies who is responsible for payment and should be signed _________ work begins - CORRECT ANSWER >>>>before the technicians first responsibility when arriving at a water damage site is to identify communicate and eliminate _________ if reasonably possible - CORRECT ANSWER >>>>safety hazards federal regulations apply to handling or disturbing of ____ based paint and asbestos - CORRECT ANSWER >>>>lead 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 P a g e | 22 ___________ ________ areas. - CORRECT ANSWER >>>>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. - CORRECT ANSWER >>>>moisture sensor , non- invasive water from a clean source with no substantial risk of causing sickness or discomfort is said to be - CORRECT ANSWER >>>>category 1 water that has significant degree of chemical biological and or physical contamination and potential to cause sickness or discomfort is ___________ - CORRECT ANSWER >>>>category 2 P a g e | 25 _________ parties during the initial inspection. - CORRECT ANSWER >>>>materially interested when carpet delimitation (the loss of integrity in the adhesives used to laminate the _____ and _____ backings) has occurred, further damage is very likely. for this reason when extensive carpet delimitation is discovered technicians must call it to the attention go all materially interested parties , document the condition and suggest replacement. - CORRECT ANSWER >>>>primary and secondary there are number of causes for carpet delimitation - many of them relates to ____ restoration activities - CORRECT ANSWER >>>>improper Many building materials will absorb excess water vapor and suffer damage, especially when air is allowed to remain above __% relative humidity. - CORRECT ANSWER >>>>60% P a g e | 26 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. - CORRECT ANSWER >>>>equalize and secondary 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 ______ - CORRECT ANSWER >>>>R-Value , removed 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. - CORRECT ANSWER >>>>extractions P a g e | 27 Abide by local ____ and regulations when disposing extracted water. Waste water is best disposed of into a sanitary sewer. - CORRECT ANSWER >>>>laws the primary goal of the initial extraction of the affected area is to contain further ______ of the water within the structure. - CORRECT ANSWER >>>>migration Whenever carpet must be disengaged from the tackless strip, a ____ ______ and carpet awl must be used. - CORRECT ANSWER >>>>knee kicker 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 - CORRECT ANSWER >>>>carpet stretching P a g e | 30 establishing _______ is the best way to set restorative dying goals. A dry standard is established by obtaining a moisture reading using an ____ material - CORRECT ANSWER >>>>dry standard , unaffected 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. - CORRECT ANSWER >>>>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. - CORRECT ANSWER >>>>ceramic tile , vinyl P a g e | 31 a thermo hygrometer is used to monitor any air that can influence the ________ and or ______ within a restorative drying environment. - CORRECT ANSWER >>>>temperature , humidity (relative humidity) 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) - CORRECT ANSWER >>>>materials air air evaporation will increase when - CORRECT ANSWER >>>>wet materials are made warmer P a g e | 32 when drier air is used 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 - CORRECT ANSWER >>>>rate of evaporation as the water has been extracted the time needed to dry wet material is determined by the - CORRECT ANSWER >>>>rate of evaporation As the water is rapidly evaporated, the water vapor is removed by ________________ or ___________. - CORRECT ANSWER >>>>dehumidification or ventilation _____ occurs when liquid changes to a vapor. occurs as energy is increased - CORRECT ANSWER >>>>evaporation P a g e | 35 if a material is not drying well what would be the most effective method of increasing evaporation? - CORRECT ANSWER >>>>warm the material one of the most effective methods of drying wet wood under hard surfaces is - CORRECT ANSWER >>>>heated airflow. Use of Psychometrics chart to complete the following calculation 80 F at 60% RH 53 F at 80% RH - CORRECT ANSWER >>>>91 GPP 48 GPP * which of the two conditions has the lowest vapor pressure? 53 F at 80% RH = 48 GPP P a g e | 36 *what is the surface temperature at which condensation would become a risk for air which is 80 F at 60% 102 F (dew point) what is the temperature in degrees F if the humidity ratio is 70 GPP and the relative humidity is 60% - CORRECT ANSWER >>>>72 F ____ is the temperature at which air becomes saturated with moisture and can hold no more water vapor - CORRECT 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. - CORRECT ANSWER >>>>100% dew point P a g e | 37 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. - CORRECT ANSWER >>>>cooler warmer ______is the force exerted by a gas (vapor molecules) on the surrounding environment. - CORRECT ANSWER >>>>vapor pressure 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 ______. - CORRECT ANSWER >>>>increase decrease water vapor pressure is the force that drives higher convention of humidity from one space P a g e | 40 Elevating the temperature of a material will increase the _____ ________ associated with the moisture in the material. - CORRECT ANSWER >>>>vapor pressure if the surface temperature of the material is higher than the _____ temperature of the surrounding air , evaporation may occur. - CORRECT ANSWER >>>>dew point 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 - CORRECT ANSWER >>>>30 class 1 water intrusions involve the ____ amount of water absorption, with less than __ % of the area surface being wet porous materials. - CORRECT ANSWER >>>>least , 5% P a g e | 41 class 2 water intrusions involve a _____ amount of water absorption, with more than ___ but less than ___ of are surface being wet porous materials - CORRECT ANSWER >>>>significant 5%-40% Class 3 water intrusion involve the ___ amount of water absorption with more than ___% of area surface being wet porous materials. - CORRECT ANSWER >>>>greatest 40% wet material 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 material have ____ absorption of water. - CORRECT ANSWER >>>>longer significant P a g e | 42 restorers must maintain their safety certified equipment properly. this includes, replacing ___ that are damaged, replacing damaged inlet and outlet ___ and checking for ___ electrical plugs. - CORRECT ANSWER >>>>cords screens grounded Install _ air mover for each ________ area before you calculate additional air movers for the square feet of surfaces and for room offsets. - CORRECT ANSWER >>>>1 affected dehumidification reduces the _____ content of the air - CORRECT ANSWER >>>>moisture A balanced drying system is achieved when the rate of dehumidification is greater than or equal to the rate of ___________. - CORRECT ANSWER >>>>evaporation P a g e | 45 are being added to the air - CORRECT ANSWER >>>>particulates to determine how many dehumidifiers to place : determine the ____ feet (meters) affected or volume of air to be dehumidified by multiplying the area's length x width x height - CORRECT ANSWER >>>>cubic note the dehumidifier rating (Association of home appliance manufacturers or AHAM rating) of the refrigerant/LGR dehumidifier being used or the process out CFM of the desiccant dehumidifier being used. Dehumidifiers AHAM ratings are measured in pins of water removed at 80 F, 60% RH for 24 hours. - CORRECT ANSWER >>>> Cupping will generally be the first indication of abnormal moisture levels in hardwood flooring P a g e | 46 as the ______ and sides of the board absorb moisture. - CORRECT ANSWER >>>>bottom Cupping in hardwood is not _________ damage, and should be dried in most cases. - CORRECT ANSWER >>>>permanent ____ 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. - CORRECT ANSWER >>>>plywood , resistant wet particle board would normally be - CORRECT ANSWER >>>>removed and replaced 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 - CORRECT ANSWER >>>>removed P a g e | 47 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. - CORRECT ANSWER >>>>underlayment 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. - CORRECT ANSWER >>>>warm During the drying process all of the gypsums original strength is restored. in fact the dried gypsum will normally be slightly ____ then before wetting. - CORRECT ANSWER >>>>stronger in structures where the surface of the wall is covered with a non-_____ surface as a vapor P a g e | 50 the wood is considered dry when - CORRECT ANSWER >>>>a) solid hardwood is within 2-4 percentage points of normal equilibrium moisture content (dry standard) b) subsurfaces below hardwood are dried to within 2-4 percentage points of the hardwood c) after wood flooring has been dried to acceptable moisture content, appropriate **acclimation time should be allowed before refinishing the best way to prevent odors and retard microbial growth in a wet structure is to ensure that all materials are dried ______ and ______ - CORRECT ANSWER >>>>throughly and rapidly when the presence of mold is suspected it is important to communicate with all parties and use appropriate_____ measures. - CORRECT ANSWER >>>>protective P a g e | 51 as with any contaminant mold should be removed or contained before any air movers are placed in the structure. blowing air can spread mold spores from the ______ area to the _____ rooms - CORRECT ANSWER >>>>contaminated , unaffected Dry rot (wood rot) can occur when wood is visibly dry yet wetter than __% moisture content. - CORRECT ANSWER >>>>20 restorers must use a third party (IEP) in situations that involve severe public health issues, ______ occupants living or working in the structure or extensive _____ contamination that can affect worker or occupant health - CORRECT ANSWER >>>>high risk microbial