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. one gallon of water weighs _______ pounds Answer ✔✔8. 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 ✔✔S 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
- ________ 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
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 Answer ✔✔Equalize Secondary 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 thoroughly cleaned using a hot water extraction method Answer ✔✔underlay Various cleaning and decontamination procedures must be used on category 3 water losses, including the removal of all ________ ________ materials affected by the water intrusion Answer ✔✔highly porous many building materials will absorb excess water vapor and suffer damage, especially when air is allowed to remain above ________% relative humidity Answer ✔✔60% Abide by local ________ and regulations when disposing extracted water. Waste water is best disposed of into a sanitary sewer Answer ✔✔laws The primary goal of the initial extraction of the affected ares is to contain further ________ of the water within the structure Answer ✔✔migration whenever carpet must be disengaged from the tackless strip, a ________ ________ and carpet awl must be used 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 Answer ✔✔Stretching if the carpet is to be re-installed, technicians should avoid cutting carpet seams unless it is absolutely ________ Answer ✔✔necessary How many gallons of water are present in the basement that measures 13' X 20' where water is standing at a depth of 4' 5"? Answer ✔✔8,596.016 Gallons
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
There are three levels of biocidal activity, according to the Environmental Protection Agency (EPA) List from weakest to strongest
- ________ 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
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
- ________ 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
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 ________ Answer ✔✔Humidity Ratio A. 60F at 20% RH = ________ GPP B. 80F at 50% RH = ________ GPP Which one has the lowest vapor pressure? Answer ✔✔A. 16 GPP B. 77 GPP A What is the surface temperature at which condensation would become a risk for air which is 80F at 60%? Answer ✔✔64F What is the temperature in degrees Fahrenheit if the humidity ration is 70 GPP, and the relative humidity is 60%? Answer ✔✔72*F ________ is the temperature at which air becomes saturated with moisture vapor, or can hold no more water vapor 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. Answer ✔✔ 100 Dew If surfaces are ________ than the dew point of the surrounding air, water will condense on those surfaces and possibly cause secondary damage. If surfaces are ________ than the dew point of the surrounding air, evaporation can occur Answer ✔✔Cooler Higher ________ is the force exerted by a gas (vapor molecules) on the surrounding environment Answer ✔✔Vapor Pressure
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% 2 0% 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
Positive air pressures are created by adding air to a space. Whenever air is added to a space, an inequality is created in air pressures. This inequality will result in the ________ of air into neighboring air spaces Answer ✔✔exfiltration Class ________ water intrusions involve the least amound of water absorption, with less that ________% of the surfaces being wet porous materials Answer ✔✔ 1 5% Class ________ water intrusions involve a significant amount of water absorption, with more that 5% but less than ________% of area surfaces being wet porous materials Answer ✔✔ 2 40% Class ________ water intrusions involve the most amount of water absorption, with more than ________% of area surfaces being wet porous materials Answer ✔✔ 3 40% Wet materials present in a Class ________ water intrusion require a longer time to dry. Water has saturated deeply into the materials and is held or trapped as bound water. Low evaporation materials have ________ absorption to water Answer ✔✔ 4 Significant Restorers must maintain their safety certified equipment properly. This includes replacing ________ that are damaged and replacing damaged inlet and outlet ________ Answer ✔✔Cords screens Install ________ air mover for each ________ area before you calculate additional air movers for the square feet of surfaces and for room offsets Answer ✔✔ 1 affected Dehumidification reduces the ________ content of the air Answer ✔✔moisture
A balanced drying system is achieved when the rate dehumidification is greater than or equal to the rate of ________ Answer ✔✔evaporation If the rate of evaporation is allowed to exceed the rate of dehumidification, ________ ________ can occur Answer ✔✔Secondary damage Refrigerant dehumidifiers remove water from the air through the process of _______ Answer ✔✔Condensation Refrigerant dehumidifiers work best between ________F and ________F Answer ✔✔70F and 90F Air filtration devices (AFDs) are needed in water restoration work whenever high levels of ________ are being added to the air Answer ✔✔Particulates Conventional refrigerant dehumidifiers under normal temperature are effective in reducing high humidity to a normal level - approximately 40% RH, or about ________ GPP Answer ✔✔55 GPP LGRs produce lower ________ ________ than conventional refrigerants and continue to remove significant water vapor down to ________ GPP Answer ✔✔Vapor pressures 34 GPP Because desiccant dehumidifiers do not use condensation to remove water, they are not limited by low dew point temperatures; therefore, they produce the lowest ________ ________ of any dehumidifier Answer ✔✔Vapor Pressure If a structure had affected air at 85* F at 65% RH, the most efficient type of dehumidifier to use would be a ________ Answer ✔✔refrigerant If a structure had affected air at 75* F at 25% RH, the most efficient type of dehumidifier to use would be a ________ Answer ✔✔Desiccant
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:
- ________/________ 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
