WRT Exam (2024/2025) | Actual Questions and Answers Latest Updated 2024/2025 (Graded A+), Exams of Health sciences

Download WRT Exam (2024/2025) | Actual Questions and Answers Latest Updated 2024/2025 (Graded A+) and more Exams Health sciences in PDF only on Docsity! WRT Exam (2024/2025) | Actual Questions and Answers Latest Updated 2024/2025 (Graded A+) 1 cubic foot of water contains ______ gallons Answer ✔✔7.48 one gallon of water weighs _______ pounds Answer ✔✔8.34 The most critical course of action in restorative drying is to _____ ______ Answer ✔✔Respond Quickly All restorers should follow the standard of care for the water restoration profession developed by the restoration industry entitled the IICRC ________ 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 Answer ✔✔potential exposures Respiratory protection regulations state that the employer must provide 1. ________ 2. ________ 3. ________ Answer ✔✔medical eval fit testing training as a minimum medical requirement, technicians performing water damage restoration services need medical consultation with their ________ ________ ________ ________ for appropriate immunizations Answer ✔✔Primary health care physician 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 Answer ✔✔Before The technician's first responsibility when arriving at a water damaged sites is to identify, communicate and eliminate ________ ________ Answer ✔✔safety hazards The most common safety hazards associated with water damaged structures result in ________ and ________ Answer ✔✔slips and falls Federal regulations apply to the handling of ________ based paint and asbestos 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 ________ ________ areas 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. Answer ✔✔moisture sensor non-invasive Water from a clean source with no substantial risk of causing sickness or discomfort is said to be ________ ________ water Answer ✔✔Category one Water that has a significant degree of chemical, biological, and/or physical contamination and potential to cause sickness or discomfort is ________ ________ water Answer ✔✔Category two When water intrusion results from a grossly unsanitary source or carries ________ (disease causing) agents, it is said to be a Category 3 Answer ✔✔pathogenic Worker 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 Answer ✔✔Health 13*20= 260 5/12= .42 4.42*260= 1,149.2 1,149.2*7.48= 8,596.016 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. Poor extraction will significantly slow the drying process Answer ✔✔Extraction Every ________ ________ of standing water contains 7.48 gallons, and weighs ________ pounds Answer ✔✔Cubic foot 8.34 There are three levels of biocidal activity, according to the Environmental Protection Agency (EPA) List from weakest to strongest 1. ________ 2. ________ 3. ________ Answer ✔✔Sanitizer Disinfectant Sterilizer Whenever a chemical antimicrobial or biocide is used, restorers must follow the label ________ explicitly Answer ✔✔directions Most antimicrobials require that the area of application be vacated by ________ and pets during application and for a period of time after application Answer ✔✔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 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 semi-porous structural materials is measured most accurately with a moisture ________ Answer ✔✔meter (invasive) 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 ________ Answer ✔✔R-value 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 Answer ✔✔ceramic tiles vinyl To evaluate the progress of structural drying projects, restorers should measure: 1. moisture in ________ being dried (moisture content readings) 2. ________ being used to dry affected materials (psychrometric readings) 3. ________ and ________ produced by mechanical systems (dehus) Answer ✔✔Materials Air Temperature and Humidity A thermo-hygrometer is used to monitor any air that can influence the ________ and/or ________ within a restorative drying environment Answer ✔✔Temperature Humidity After physically removing excess water, the time required to dry wet materials is influenced most by the ________ Answer ✔✔Rate of Evaporation As the water is rapidly evaporated, the water vapor is removed by ________ or ________ Answer ✔✔Dehumidification or Ventilation ________ occurs when liquid changes to a vapor. Occurs as energy is increased Answer ✔✔Evaporation As moisture evaporates from a wet material, the surface of the material becomes ________ because energy is released from the material Answer ✔✔Cooler ________ occurs when vapor changes to a liquid. Occurs as energy is removed Answer ✔✔Condensation ________ occurs when a solid changes to a vapor (without going through a liquid phase). Answer ✔✔Sublimation 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 Answer ✔✔Frozen or Dried When the air temperature increases, it can hold ________ water vapor Answer ✔✔More Evaporation will increase when 1. ________ 2. ________ 3. ________ Answer ✔✔Wet materials are made warmer when drier air is used when air is moved more rapidly across the wet surface If a material is not drying well, the most effective method of increasing evaporation is to ________ Answer ✔✔Warm the material One of the most effective methods of drying wet wood under hard surfaces is ________ Answer ✔✔Heated airflow The amount of moisture contained in an air sample, as compared to the maximum amount the air could hold at that temperature is called ________ Answer ✔✔Relative Humidity Directly related to GPP and dew point, ________ is pressure of the water vapor on surrounding surfaces and objects, and is measured in inches of mercury. Answer ✔✔Vapor Pressure Movement of water vapor through a material is called ________ Answer ✔✔Vapor diffusion A measure of the ability for vapor to travel through a material is called ________ Answer ✔✔Permeance ________ is the difference in GPP of the air entering and air leaving a dehumidifier - an indicator of dehumidifier performance Answer ✔✔Grain Depression ________ is a chemical which reduces the amount of microorganisms on a surface, but does not eliminate all microbial life Answer ✔✔Sanitizer ________ is a chemical which kills all forms of microbial life, but not the microbial spores. Answer ✔✔Disinfectant ________ is a chemical which kills all forms of microbial life, including their spores Answer ✔✔Sterilizer The percent of moisture in wood when compared to an oven-dried sample is referred to as the ________ Answer ✔✔Moisture content ________ is the Association of Home Appliance Manufacturers, Publishes test results for water removal of dehumidifiers at conditions of 80*F/60%RH over 24 hours Answer ✔✔AHAM Cubic feet of water x 7.48 = gallons Answer ✔✔Gallons of Water equation A x V x 24 / 1000 x $/kWh = $/day Answer ✔✔Electrical cost formula Amps x Volts x 3.4 = BTU/hr (heat energy) Answer ✔✔BTUs of heat from equipment Grain dep. x CFM / 71 = pints/day Answer ✔✔Performance in Pints/day Cubic ft x ACH / 60 = CFM Answer ✔✔Air Filtration Device Calculation One pound of air is approximately ________ cubic feet in size Answer ✔✔14 ________ grains are in 1 pound Answer ✔✔7000 One ton of air conditioning is approximately ________ BTUs Answer ✔✔12000 All structure items should be dried to within ________ points of EMC Answer ✔✔4% ________ MC and higher supports mold growth on the surface of wood Answer ✔✔16% 20% MC supports ________ rot in wood Answer ✔✔Dry 30% MC is wood fiber saturation point and supports ________ rot Answer ✔✔Wet Never use more than ________% of the available power on a circuit Answer ✔✔80% HEPA filters ________% of all particles down to 0.3 microns Answer ✔✔99.97% 55 GPP is the lower limit for performance from ________ dehumidifiers Answer ✔✔Conventional 34 GPP is the lower limit for performance from ________ dehumidifiers Answer ✔✔LGR ACM means ________ Answer ✔✔Asbestos containing material EMC means ________ Answer ✔✔equilibrium moisture content MDF means ________ Answer ✔✔Medium density fiberboard AFD means ________ Answer ✔✔Air filtration device CFM means ________ Answer ✔✔cubic feet per minute ACH means ________ Answer ✔✔Air changes per hour AEH means ________ Answer ✔✔Air exchanges per hour Materials with a permeance ratings of less than ________ are referred to as vapor retarding materials (sometimes referred to as vapor barriers) Answer ✔✔1.0 Vapor ________ is the process by which water moves through permeable material Answer ✔✔Diffusion Where a negative pressure is created, air will move from neighboring spaces to "make up" for the air removed. This process is referred to as ________ Answer ✔✔Infiltration Strong ________ air pressure can cause combustion appliance exhaust to back draft into the structure Answer ✔✔Negative Crawlspaces are commonly unclean; when dried, they are held under a ________ air pressure relative to the ________ ________ of the house to prevent volatile organic compounds and particulate from entering the air space above Answer ✔✔Negative Living area If a structure cannot be warmed to a temperature where LGRs would be effective, the most efficient type of dehumidifier to use would be a ________ Answer ✔✔Desiccant When using conventional refrigerant dehumidifiers in a "Class 2" water loss containing 15,000 cubic ft., the initial AHAM-rated capacity required is ________ Answer ✔✔375 AHAM pint required initially When using conventional refrigerant dehumidifiers that remove 125 pints at AHAM test conditions, the number installed initially on a Class 1 water loss with 25,000 cubic ft. is ________ ________ Answer ✔✔250 AHAM pints initially = 2 conventional refrigerant dehumidifiers When using desiccant dehumidification in a Class 4 water loss in a 2,000 square ft. structure with a 9- foot ceiling height, the initial CFM required is ________ Answer ✔✔900 CFM required initially ________ represents the "was-wood" material with the least engineering, and thus the most natural fiber bonding. Answer ✔✔Plywood Plywood is ________ to swelling and delamination due to its wood veneer assemblies which are glued under extreme pressure Answer ✔✔Resistant Wet particle board would normally be ________ and ________ Answer ✔✔Removed and replaced Plastic Laminate Flooring is made up of ________ and has a resin saturated appearance layer Answer ✔✔MDF Remove the vinyl (flooring) and discard it if the ________ 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 Answer ✔✔Underlayment Partial floating of carpet can be a way to achieve drying of all surfaces simultaneously and allows ________ dry air to have more contact with wet flooring Answer ✔✔Warm During the drying process, all of the gypsum's original strength is restored. In fact, the dried gypsum will normally be slightly ________ than before wetting Answer ✔✔Stronger In structures where the surface of the wall is covered with a non-________ surface it may be necessary to remove base molding drill holes and introduce air movement Answer ✔✔Permeable Airflow in the wall cavity increases the rate of ________ and allows the wall to dry from both inside and out Answer ✔✔Evaporation When ceilings are affected, drying procedures are very similar to wall drying. if the ceiling is sagging or otherwise damaged, wet drywall is drained, ________ and ________ Answer ✔✔Remove and discard Specific types of secondary damage associated with contents are typically: 1. ________ 2. ________ 3. ________ 4. ________/________ Answer ✔✔Swelling Staining Color transfer delamination of surface/ finish material Cupping will generally be the first indication of abnormal moisture levels in hardwood flooring as the ________ and sides or the board absorb moisture Answer ✔✔Bottom Cupping in hardwood is not ________ damage, and should be dried in most cases Answer ✔✔Permanent Restorers will know the drying job is dry and done when moisture meters verify that the structure has reached the ________ ________ Answer ✔✔Drying goals RMC is ________ ________ ________ ________ Answer ✔✔Record of Moisture Content ________ ________ is a diagram or sketch indicating the boundaries and moisture levels of the affected area Answer ✔✔Moisture Map RDC is ________ ________ ________ ________, or Daily Humidity Record Answer ✔✔Record of Drying Conditions Hardwood and sub-surfaces are within ________-________ percentage points of normal Equilibrium Moisture Content (Dry Standard) Answer ✔✔2%-4% After wood flooring has been dried to acceptable moisture content, appropriate ________ Answer ✔✔Acclimation The best way to prevent odors are retard microbial growth in a wet structure is to ensure that all materials are dried ________ and ________ Answer ✔✔Thoroughly and rapidly As mold grows, it can produce a toxic chemical substance. All mold related toxins are referred to as ________ Answer ✔✔mycotoxins When the presence of mold is suspected, it is important to communicate with all parties and use appropriate ________ measures Answer ✔✔Protective As with any contaminant, mold should be ________ or contained before any air movers are placed in the structure Answer ✔✔Removed Blowing air can spread mold spores from previous areas to the ________ rooms Answer ✔✔Unaffected Dry rot can occur when wood is visibly dry yet wetter than ________% moisture content Answer ✔✔20% Velocity of air blown by air movers is measured in _________ Answer ✔✔FPM - Feet per minute