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WATER RESTORATION Exam IICRC
Questions and Correct Answers
____ 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 - ANScombination ____ is the temperature at which air becomes saturated with moisture and can hold no more water vapor - ANSdew point ____ occurs when a solid changes to a vapor( without going through a liquid phase.) - ANSsublimation ____ 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. - ANSplywood , resistant _____ occurs when liquid changes to a vapor. occurs as energy is increased - ANSevaporation ______ 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. - ANSrelative humidity
______is the force exerted by a gas (vapor molecules) on the surrounding environment. - ANSvapor pressure ___. occurs when vapor changes to a liquid. occurs as energy is removed - ANScondensation
- The label is the law" get customer briefing before starting any antimicrobial / biocide treatment. - ANS A balanced drying system is achieved when the rate of dehumidification is greater than or equal to the rate of ___________. - ANSevaporation a thermo hygrometer is used to monitor any air that can influence the ________ and or ______ within a restorative drying environment. - ANStemperature , humidity (relative humidity) Abide by local ____ and regulations when disposing extracted water. Waste water is best disposed of into a sanitary sewer. - ANSlaws after excess water has been extracted the time needed to dry wet materials is determined by the - ANSrate of evaporation 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. - ANSpotentially affected
produce the lowest _____ ________ of any dehumidifier. - ANSvapor pressure 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. - ANSceramic tile , vinyl class 1 water intrusions involve the ____ amount of water absorption, with less than __ % of the area surface being wet porous materials. - ANSleast , 5% class 2 water intrusions involve a _____ amount of water absorption, with more than ___ but less than ___ of are surface being wet porous materials
- ANSsignificant 5%-40% Class 3 water intrusion involve the ___ amount of water absorption with more than ___% of area surface being wet porous materials. - ANSgreatest 40% cleaning procedures must be employed before the drying of a category 2 water loss can continue. at a minimum affected __________ must be removed and disposed of and carpet must be throughly cleaned using a hot water extraction method. - ANScarpet underlay
Cupping in hardwood is not _________ damage, and should be dried in most cases. - ANSpermanent Cupping will generally be the first indication of abnormal moisture levels in hardwood flooring as the ______ and sides of the board absorb moisture. - ANSbottom dehumidification reduces the _____ content of the air - ANSmoisture Dry rot (wood rot) can occur when wood is visibly dry yet wetter than __% moisture content. - ANS drying systems (provide name and brief descriptions of each) - ANSopen: intentional using outdoor air closed: using mechanical dehumidification only combination: using outdoor air combo with mechanical dehumidification During the drying process all of the gypsums original strength is restored. in fact the dried gypsum will normally be slightly ____ then before wetting. - ANSstronger Elevating the temperature of a material will increase the _____ ________ associated with the moisture in the material. - ANSvapor pressure
if a material is not drying well what would be the most effective method of increasing evaporation? - ANSwarm the material if a structure cannnot be warmed to a temperature where LGRs would be effective the most efficient type of dehumidifiers to use would be:____ - ANSdesiccant if a structure had affected air at 75 F at 25% RH the most efficient type of air dehumidifier to use would be ____ - ANSdesiccant if a structure had affected air at 85 F at 65% RH the most efficient type of dehumidification to use would be a _______ - ANSrefrigerant If carpet is to be re-installed, technicians should avoid cutting carpet seams unless it is absolutely - ANSnecessary if open drying is determined appropriate, the following options (while keeping building security in mind) are available to the restorer - ANS- using ventilation
- open windows -install fans to create pressure differentials & air exchange 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. - ANScooler
warmer If the rate of evaporation is allowed to exceed the rate of dehumidification, _________ ______ can occur. - ANSsecondary damage if the surface temperature of the material is higher than the _____ temperature of the surrounding air , evaporation may occur. - ANSdew point 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. - ANSpermeable 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 - ANShumidity ratio inspections are more consistent when the overall goals are kept in mind - ANSa) determine hoe wet items are
- monitor daily in most circumstances -use the same meters in the same locations each day b) determine if wet items are drying c)determine if affected items are dry (done) Install _ air mover for each ________ area before you calculate additional air movers for the square feet of surfaces and for room offsets. - ANS affected
AHAM ratings are measured in pins of water removed at 80 F, 60% RH for 24 hours. - ANS one of the most effective methods of drying wet wood under hard surfaces is - ANSheated airflow. open , closed or combination - how to decide? - ANSis 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 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. - ANSwarm 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 - ANSremoved
pre-existing conditions should be identified documented and communicated to all _________ parties during the initial inspection. - ANSmaterially interested 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 - ANScondensation 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. - ANSunderlayment respiratory protection regulations state that the employer must provide - ANS1. medical evaluations
- fit testing
- training restorers must maintain their safety certified equipment properly. this includes, replacing ___ that are damaged, replacing damaged inlet and outlet ___ and checking for ___ electrical plugs. - ANScords screens grounded restorers must use a third party (IEP) in situations that involve severe public health issues, ______ occupants living or working in the structure or
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. - ANSextractions 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. - ANSmeter the primary goal of the initial extraction of the affected area is to contain further ______ of the water within the structure. - ANSmigration the technicians first responsibility when arriving at a water damage site is to identify communicate and eliminate _________ if reasonably possible - ANSsafety hazards 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. - ANSmoisture sensor , non-invasive the wood is considered dry when - ANSa) solid hardwood is within 2- 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 there are 3 levels of biocidal activity, according to the environmental protection agency EPA( provide starting with weakest) - ANS1. sanitizer: cleaning treatment designed to reduce # of pathogenic microorganisms to a safe level.
- disinfectant: designed to destroy or inactivate microorganisms but not necessarily their spores
- Sterilizer: a product designed to destroy or eliminate all forms of microorganisms (fungi, bacteria, viruses) and their spores. there are number of causes for carpet delimitation - many of them relates to ____ restoration activities - ANSimproper Third party experts are commonly referred to as Indoor Environmental Professionals, or ____. - ANSIEP 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 - ANScubic
102 F (dew point) 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 ______. - ANSincrease decrease Various cleaning and decontamination procedures must be used on Category 3 water losses, including the removal of all ______ ______ materials affected by the water intrusion. - ANShighly porous water from a clean source with no substantial risk of causing sickness or discomfort is said to be - ANScategory 1 water that has significant degree of chemical biological and or physical contamination and potential to cause sickness or discomfort is ___________ - ANScategory 2 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. - ANSequilibrium 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. - ANSlonger significant
wet particle board would normally be - ANSremoved and replaced what is the temperature in degrees F if the humidity ratio is 70 GPP and the relative humidity is 60% - ANS72 F 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.
- ANS100% dew point 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. - ANSprimary and secondary 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 _____. removal should be done ____drying procedures begin or continue. - ANSdiscarded removed
60 degrees 70 degrees 80 degrees - ANS 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 - ANS worker and occupant ______ and safety are the 1st priority on every sewage loss. areas affected by category 3 water intrusion are marked and posted as potentially hazardous. - ANShealth
