WRT Certification Questions and Answers

WRT Certification Questions and Answers What is the most important aspect to the beginning of a job? Risk/Hazard assessment for the safety of all individuals involved Employers must provide training, a fit test, and a medical evaluation for employees who will be utilizing what equipment? Respirator and cartridges Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:00 / 0:15 Full screen Brainpower Read More What should be completed before starting emergency mitigation services? A work authorization (contract) has been signed. Often found in older structures, lead and asbestos are hazardous materials regulated by the federal government. True Water that has a significant degree of contamination and could cause illness is which of these? Category 2 Water that is grossly contaminated Category 3 If stopped from removing highly porous materials (carpet) on a Category 3 job, what should the restorer do? Stop work to prevent liability Secondary damage is more likely to occur when relative humidity levels are 65% When a water loss occurs, the most important factor in reducing damage is Rapid response to start mitigation procedures What steps should be taken when working in an area with potential contamination? Wear proper PPE, contain the area Which of the following would be considered category 1 water? - is grossly contaminated - from a sanitary source - has significant contamination - contains regulated materials From a sanitary source Performing a thorough extraction or repeated extractions accomplishes what? reduces drying times Water extracted from a jobsite should be disposed of according to local laws In a crawlspaces that measures 37' x 42' and has water standing at a depth of 1' 9", how many total gallons are there? 20,341 gallons A moisture reading obtained from an unaffected material that allows the restorer to set drying goals for the affected structure Dry standard When is a drying job done? a moisture meter indicates we have met our dry goal The moisture sensor can be used to verify our drying goal has been met false Moisture sensors and IR camera are effective tools for quickly locating moisture in carpet What does a thermo-hygrometer measure? Temperature and relative humidity Why do IR infarred cameras indicate possible moisture in materials? Materials surface temperature cools as water evaporates Once an area is identified with an infared camera as a suspect of being wet, that area must be verified with A thermal hygrometer??? Psychometric conditions have a direct effect on the rate at which moisture moves within materials, as well as from wet materials True The amount of moisture in the air, as a percentage of the maximum amount the air could hold at a given temperature is known as which of these Relative humidity What is the ratio of the weight of water vapor mixed with one pound of dry air called Humidity ratio To promote effective drying, restorers need to control Surface temperature of the wet materials, air temperature of the drying chamber, vapor pressure of the drying chamber A surface with a temperature at or below dew point results in what? Condensation If you increase the temperature in a drying chamber, what change will occur in the relative humidity? Decrease Evaporation will increase when wet materials are made warmer At dew point temperature (100% relative humidity) liquid changes to vapor Providing dry airflow and increasing the temperature of wet materials (wood, wall cavities, carpet) the more energy is available for ____ to occur If a drying chamber is 75 degrees and 40% RH, what is the humidity ratio? A material that is very weakened when wet, but if dried properly, retains its original strength What is permeance Classes of water describe A drying chamber that has the least amount of area affected porous materials (less than 5%) of the combined walls, floors, and ceiling materials is a A drying chamber that has the greatest amount of moisture, affecting porous materials (over 40%) of the combined walls, floors, and ceiling materials is a