WRT Certification Exam Questions With Correct Answers (100% Verified)

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. - Answer 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. - Answer ceramic tile & vinyl A thermo-hygrometer is used to monitor any air that can influence the ___________ and/or ________ ________ with a restorative drying environment. - Answer temperature & relative humidity 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. ___ produced by mechanical systems (dehumidifiers) - Answer materials, air, & air Evaporation will increase when: - Answer 1. Wet materials are made warmer. 2. When drier air is used. 3. When 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 ____ __ ___________. - Answer rate of evaporation As the water is rapidly evaporated, the water vapor is removed by ________________ or ___________. - Answer dehumidification & 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 every is removed. - Answer Condensation ___________ occurs when a solid changes to a vapor (without going through a liquid phase.) - Answer Sublimation WRT Certification Exam Questions And Answers. 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 & dried ________ ________ is defined as the amount of moisture contained in an air sample, as compared to the maximum amount the air could hold at that temperature. - Answer Relative humidity (RH) When the air temperature increases, it can hold ____ water vapor. - Answer more 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 ration Which of these surface temperatures would promote the most rapid evaporation? A. 60 degrees B. 70 degrees C. 80 degrees - Answer C. 80 degrees If a material is not drying well, what would be the most effective method of increasing evaporation? A. Use air filtration B. Warm the material C. Add more airflow - Answer B. Warm the material 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 - Answer A. Heated airflow ___ _____ is the temperature at which air becomes saturated with moisture and 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 ______ 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. - Answer cooler & warmer _____ ________ is the force exerted by a gas (vapor molecules) on the surrounding environment. - Answer Vapor pressure WRT Certification Exam Questions And Answers. Vapor pressure, dew point, and humidity ration (GPP) are ________ _______ to each other. When one increases, the other two ________. When one decreases, the other two ________. - Answer directly related, increase, & decrease 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 of water vapor. - Answer equilibrium The ability for water vapor to diffuse through a solid material is expressed as the materials _________. - Answer permeance 3 drying systems: - Answer 1. Open- intentionally using outdoor air 2. Closed- using mechanical dehumidification only 3. Combination- using outdoor air combined with mechanical dehumidification If open drying is determined appropriate, the following options are available to the restorer: - Answer 1. 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. - Answer Combination Elevating the temperature of a material will increase the _____ ________ associated with the moisture in the material. - Answer vapor pressure If the surface temperature of the material is higher than the ___ point temperature of the surrounding air, evaporation may occur. - Answer dew Which of these surface temperature would have the fastest rate of evaporation? A. 10 degrees below dew point B. 20 degrees above dew point C. 30 degrees above dew point - Answer C. 30 degrees above dew point (the higher the better) Class 1 water intrusions involve the _____ amount of water absorption, with less than _% of the area surfaces being wet porous materials. - Answer least & 5 Class 2 water intrusions involve a ___________ amount of water absorption, with more that _% but less than __% of area surfaces being wet porous materials. - Answer significant, 5, & 40