Download WATER RESTORATION IICRC Exam Mastery Toolkit: Proven Practice Questions & Expert Solutions and more Exams Water and Wastewater Engineering in PDF only on Docsity!
WATER RESTORATION IICRC
if a structure cannot be warmed to a temperature where LGRs would be effective the most efficient type of dehumidifiers to use would be:____ - Correct Answer ✔️ ✔️ desiccant
air filtration device (AFDs) are needed in water restoration work whenever high levels of ____ 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 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
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. - Correct Answer ✔️ ✔️
permeable
Airflow in the wall cavity increases the rate of ___________ and allows the wall to dry from both inside and out. - Correct Answer ✔️ ✔️
evaporation
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. - Correct Answer ✔️ ✔️ discarded
removed
inspections are more consistent when the overall goals are kept in mind
- Correct Answer ✔️ ✔️ a) 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)
Restorers will know the drying job is dry and done when moisture meters verify that the structure has reached the ______ _____. - Correct Answer ✔️ ✔️ drying goal
moisture documentation of restoration work should include each of the following components - Correct Answer ✔️ ✔️ a)record of moisture content (RMC)
b) moisture map-a diagram or sketch indicating the boundaries and moisture levels of the affected are.
c)record of drying conditions (RDC) or daily humidity record.
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
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%
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 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
If carpet is to be re-installed, technicians should avoid cutting carpet seams unless it is absolutely - Correct Answer ✔️ ✔️ necessary
how many gallons of water are presenting a basement that measures 30' x 25' where water is standing at a depth of 6'9" - Correct Answer
✔️ ✔️ 30'x25'x6.75' (9"/12") = 5062.5 cuft x 7.48= 37,867.
every cubic foot of standing water present in a structure contains ___ gallons (28.3 liters) and each gallon (3.8 liters) of water wights 8.34pounds (3.8 kg) - Correct Answer ✔️ ✔️ 7.
there are 3 levels of biocidal activity, according to the environmental protection agency EPA( provide starting with weakest) - Correct Answer ✔️ ✔️ 1. 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.
whenever a chemical antimicrobial or biocide is used restorers must follow the label ____ explicitly - Correct Answer ✔️ ✔️ directions
most antimicrobials require that the area of application be vacated by ______ and pets during application and or a period of time after application. - Correct Answer ✔️ ✔️ occupants
- The label is the law" get customer briefing before starting any antimicrobial / biocide treatment. - Correct Answer ✔️ ✔️
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
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
As moisture evaporates from a wet material, the surface of the material becomes ______ because energy is released from the material. - Correct Answer ✔️ ✔️ cooler
___. occurs when vapor changes to a liquid. occurs as energy is removed - Correct Answer ✔️ ✔️ condensation
which of these surface temperatures would prompt the most rapid evaporations?
60 degrees
70 degrees
80 degrees - Correct Answer ✔️ ✔️ 80
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
*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
decrease
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. - Correct Answer ✔️ ✔️
equilibrium
the ability for water vapor to diffuse through a solid material is expressed as the materials _____ - Correct Answer ✔️ ✔️
permeance
drying systems (provide name and brief descriptions of each) - Correct
Answer ✔️ ✔️ open: intentional using outdoor air
closed: using mechanical dehumidification only
combination: using outdoor air combo with mechanical dehumidification
open , closed or combination - how to decide? - Correct 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
