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2025 - 2026 WRT CERTIFICATION
EXAM|100QUESTIONS AND ANSWERS|ALREADY
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The ultimate goal is to find the "edge" of water migration, which moves in a three- (non-penetrating) moisture meter. ANS:->>>moisture sensor & non- invasive Water from a clean source with no substantial risk of causing sickness of discomfort is said to be _ water. ANS:->>> Category 1 Water that has a significant degree of chemical, biological, and/or physical contamination and a potential to cause sickness or discomfort is
. ANS:->>> Category 2 Cleaning procedures must be employed before the drying of a Category 2 water loss can continue. At a minimum, affected (or pad) must be removed and disposed of, and carpet must be throughly cleaned using hot water extraction method. ANS:->>> carpet underlay dimensional path throughout the structure. This is accomplished across carpeted surfaces using a , and across most hard surfaces using a -
When water intrusion results from a grossly unsanitary source or carries (disease causing) agents, it is said to be Category 3. **ANS:-
** pathogenic Workers 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. ANS:->>> health Various cleaning and decontamination procedures must be used on Category 3 water losses, including the removal of all materials affected by the water intrusion. ANS:->>> highly porous When resistance is encountered and performing proper services in a Category 3 water loss becomes a challenge, restorers immediately to prevent liability and address the conflict. ANS:->>> stop work Third party experts are commonly referred to as Indoor Environmental Professionals, or. ANS:->>> IEPs Losses where regulated or hazardous materials have contaminated the structure do not change the of water. ANS:->>> category Pre-existing conditions should be identified, documented, and communicated to all parties during the initial inspection. ANS:->>> materially interested
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. ANS:->>> equalize & secondary When water intrusion results in water running through wall cavities, inspection access holes are used to ensure that blow-in insulation has not compacted and lost its _-. ANS:->>> R-Value The most effective way to speed the drying process is to remove as much of the ANSWER extraction Abide by local and regulations when disposing extracted water. Waste water is best disposed of into a sanitary sewer. ANS:->>> laws The primary goal of the initial extraction of the affected area is to contain further of the water within the structure. ANS:->>> migration Whenever carpet must be disengaged from the tackless strip, a and carpet awl must be used. ANS:->>> 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 water in a liquid state as possible during the phase (for example, multiple extractions). Poor extraction will significantly slow the drying process. -
barrier.
The numerical value form 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 , not a moisture sensor. ANS:->>>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. ANS:->>>ceramic tile & vinyl A thermo-hygrometer is used to monitor any air that can influence the and/or with a restorative drying environment. ANS:-
temperature & 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) ANS:->>>materials, air, & air Evaporation will increase when: ANS:->>>1. Wet materials are made warmer.
- When drier air is used.
- When air is moved more rapidly across the wet surface. As the water is rapidly evaporated, the water vapor is removed by or. ANS:->>>dehumidification & ventilation occurs when liquid changes to a vapor. Occurs as energy is increased. ANS:->>>Evaporation As moisture evaporates from a wet material, the surface of the material becomes because energy is released from the material. ANS:->>>cooler occurs when vapor changes to a liquid. Occurs as every is removed. ANS:->>>Condensation occurs when a solid changes to a vapor (without going through a liquid phase.) ANS:->>>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. ANS:->>>Frozen & dried After excess water has been extracted, the time needed to dry wet materials is determined by the -------------------------------- Answer rate of evaporation
One of the most effective methods of drying wet wood under hard surfaces is: A. Heated airflow B. Demolition of the wood C. Negative air pressure ANS:->>>A. Heated airflow is the temperature at which air becomes saturated with moisture and can hold no more water vapor. ANS:->>>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. ANS:->>>100% & dew If surfaces are that the dew point of the surrounding air, water will condense on those surfaces and possibly cause secondary damage. If surfaces are that the dew point of the surrounding air, evaporation can occur. ANS:->>>cooler & warmer is the force exerted by a gas (vapor molecules) on the surrounding environment. ANS:->>>Vapor pressure Vapor pressure, dew point, and humidity ration (GPP) are to each other. When one increases, the other two. When one decreases, the other two. ANS:->>>directly related, increase, & decrease
of water vapor. ANS:->>>equilibrium The ability for water vapor to diffuse through a solid material is expressed as the materials. ANS:->>>permeance 3 drying systems: ANS:->>>1. Open- intentionally using outdoor air
- Closed- using mechanical dehumidification only
- Combination- using outdoor air combined with mechanical dehumidification If open drying is determined appropriate, the following options are available to the restorer: ANS:->>>1. Using ventilation
- Opening windows
- Install fans to create pressure differentials and air exchanges drying systems merge the benefits 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. ANS:->>>Combination Elevating the temperature of a material will increase the associated with the moisture in the material. ANS:->>>vapor pressure If the surface temperature of the material is higher than the point Water vapor pressure is the force that drives higher concentrations of humidity from one space to another in an attempt to seek with lower concentrations
longer &significant Restorers must maintain their safety certified equipment properly. This includes replacing that are damaged, replacing damaged inlet and outlet , and checking for electrical plugs. ANS:->>>cords, screens, & damaged Install _ air mover for each area before you calculate additional air movers for the square feet of surfaces and for room offsets. ANS:->>>1 & affected Dehumidification reduces the content of the air. ANS:->>>moisture A balanced drying system is achieved when the rate of dehumidification is greater than or equal to the rate of. ANS:->>>evaporation If the rate of evaporation is allowed to exceed the rate of dehumidification,
- Using ventilation 2. Opening windows 3. Install fans to create pressure differentials and air exchanges drying systems merge the benefits 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. ANS:->>>Combination Elevating the temperature of a material will increase the associated with the moisture in the material. ANS:->>>vapor pressure If the surface temperature of the material is higher than the point Water vapor pressure is the force that drives higher concentrations of humidity from one space to another in an attempt to seek with lower concentrations >>>longer &significant Restorers must maintain their safety certified equipment properly. This includes replacing that are damaged, replacing damaged inlet and outlet , and checking for electrical plugs. ANS:->>>cords, screens, & damaged Install _ air mover for each area before you calculate additional air movers for the square feet of surfaces and for room offsets. ANS:->>>1 & affected Dehumidification reduces the content of the air. ANS:->>>moisture A balanced drying system is achieved when the rate of dehumidification is greater than or equal to the rate of. ANS:->>>evaporation If the rate of evaporation is allowed to exceed the rate of dehumidification, can occur. ANS:->>>secondary damage Refrigerant dehumidifiers remove water form the air through the process of
. Because of this fact, they are more efficient in higher humidity conditions. Refrigerant dehumidifiers work best between degrees and degrees. ANS:-
condensation, 70, & 90
Conventional refrigerant dehumidifiers under normal temperatures are effective in reducing high humidity to a normal level - approximately 40% RH, or about GPP . ANS:->>> 55 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. ANS:->>>vapor pressure If a structure had affected air at 85 degrees at 65% RH, the most efficient type of dehumidifier to use would be a : Refrigerant or Desiccant ANS:->>>Refrigerant If a structure had affected air at 75 degrees at 25% RH, the most efficient type of dehumidifier to use would be a : Refrigerant or Desiccant ANS:->>>Desiccant LGRs produce lower than conventional refrigerants and continue to remove significant water vapor down to __ GPP. - Answer vapor pressure & 34
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. ANS:-
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. ANS:->>>warm During the drying process, all of the gypsum's original strength is restored. In fact, the dried gypsum will normally be slightly that before wetting. ANS:->>>stronger In structures where the surface of the wall is covered with a non- surface as a vapor barrier, it may be necessary to removed base molding, drill holes and introduce air movement. ANS:->>>permeable Airflow in the wall cavity increases the rate of and allows the wall to dry from both inside and out. ANS:->>>evaporation When ceilings are affected, drying procedures are similar to wall drying. If the ceiling ANS:->>>removed & discarded is sagging or otherwise damaged, wet drywall is drained, , and.
Specific types of secondary damages associated with contents are typically: ANS:->>>1. Staining
- Swelling
- Color transfer
- Delamination of surface/finished material Inspections are more consistent when the overall goals are kept in mind: a. Determine how wet items are:
- Monitor in most circumstances.
- Use the same in the same locations each day. b. Determine if wet items are. c. Determine if items are dry (done). ANS:->>>daily, meters, drying, & affected Restorers will know the drying job is dry and done when moisture meters verify that the structure has reached the. ANS:->>>drying goals Moisture documentation of restoration work should include each of the following components: a. Record of Content (RMC) b. Moisture Map - a diagram or sketch indication the boundaries and moisture level of the affected area
Dry rot (wood rot) can occur when wood is visibly dry yet wetter than % moisture content. ANS:->>> 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. ANS:-
high risk & microbial All restorers should follow the standard of care for the water restoration removed & discarded is sagging or otherwise damaged, wet drywall is drained, , and. Specific types of secondary damages associated with contents are typically: ANS:->>>1. Staining 2. Swelling 3. Color transfer 4. Delamination of surface/finished material Inspections are more consistent when the overall goals are kept in mind: a. Determine how wet items are: - Monitor in most circumstances. - Use the same in the same locations each day. b. Determine if wet items are. c. Determine if items are dry (done). ANS:->>>daily, meters, drying, & affected Restorers will know the drying job is dry and done when moisture meters verify that the structure has reached the. ANS:->>>drying goals Moisture documentation of restoration work should include each of the following components: a. Record of Content (RMC) b. Moisture Map - a diagram or sketch indication the boundaries and moisture level of the affected area Dry rot (wood rot) can occur when wood is visibly dry yet wetter than % moisture content. ANS:->>> 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. ANS:- >>>high risk & microbial All restorers should follow the standard of care for the water restoration profession developed by the restoration industry entitled the IICRC. ANS:->>>S Respiratory protection regulations state that the employer must provide: ANS:- 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. - Answer contaminated & unaffected The most critical course of action in restorative drying is to and begin as soon as possible. - Answer respond quickly & mitigation 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
- Medical evaluations
- Fit testing
- Training 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. ANS:->>>before The technicians first responsibility when arriving at a water damage site is to identify, communicate, and eliminate if reasonably possible. ANS:-
safety hazards Federal regulations apply to the handling of based paint and asbestos. ANS:->>>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. ANS:->>>potentially affected
