WRT Certification Exam - Questions and Answers

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WRT Certification Exam - Questions and Answers If the rate of evaporation is allowed to exceed the rate of dehumidification, _________ ______ can occur. secondary damage Refrigerant dehumidifiers rem ... ove 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. 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. 55 LGRs produce lower _____ _________ than conventional refrigerants and continue to remove significant water vapor down to __ GPP. vapor pressure & 34 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. 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 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 Desiccant If a structure cannot be warmed to a temperature where LGRs would be effective, the most efficient type of dehumidification to use would be: Refrigerant or Desiccant Desiccant Air filtration devices (AFDs) are needed in water restoration work whenever high level of ____________ are being added to the air. Particulates Cupping will generally be the first indication of abnormal moisture levels in hardwood flooring as the ______ and sides of the board absorb moisture. Bottom Cupping in hardwood is not _________ damage, and should be dried in most cases. Permanent _______ represents the "was-wood" material with the least engineering, and thus the most natural fiber bonding. It is _________ to swelling and delamination due to its wood veneer assemblies which are glued under extreme pressure. Plywood & resistant Wet particle board would normally be _______ and replaced Removed Plastic Laminate Flooring is made of MDF and has a resin saturated appearance layer. Normally _______ in water restoration due to its construction and installation components. Removed 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. 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. 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. 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. Permeable Airflow in the wall cavity increases the rate of ___________ and allows the wall to dry from both inside and out. Evaporation When ceilings are affected, drying procedures are similar to wall drying. If the ceiling is sagging or otherwise damaged, wet drywall is drained, _______, and _________. [Show More]

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