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IICRC WRT Test Exam QUESTIONS AND CORRECT
ANSWERS| ACCURATE REAL EXAM WITH
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#1. The number of gallons (liters) present in standing water that is 4-foot- 9 - inch in depth occupying a 20 foot by 25 foot(6.1 m x 7.6m) basement is answers C. 17765 (67240) #2. The surface temperature of a material on which water will condense when contacted by air at 95 F (35 C) and 50% RH is answers A) 73 F (23 C) #3. Waste water shall be disposed of answers D) in accordance with applicable laws and regulations #4. An initial attempt to determine the perimeter of wet carpet and cushion (pad, underlay) can be quickly and most easily estimated by answers A) using a moisture sensor or thermal imaging camera #5. When cellulosic insulation becomes wet answers B) it should be removed and structure materials dried
#6. Water intrusion where a significant amount of water is trapped or bound within low evaporation building materials or assemblies, may require longer drying time is defined as answers D) class 4 #7. Materials continue to absorb and desorb water vapor until they have reached answers D) equilibrium with the environment #8. Drying equipment should remain in operation on site until answers D. affected materials meet predetermined drying goals #9. The potential ease of water vapor to pass through a material is answers b. permeability (had different answer but this makes more sense)
1 0. For safety, air movers shall be equipped with answers C. a grounded electrical
plug
1 1. The drying goal for solid hardwood flooring is within answers A. 2- 4
percentage points of the dry standard
1 2. Generally, the drying system that creates the lowest atmospheric vapor pressure is
answers D. desiccant dehumidification #63. Applying thermal energy directly to wet materials can be used to accelerate evaporation by increasing the temperature and the waters answers D. Vapor pressure #64. The atmospheric conditions with the lowest humidity ratio is answers A. 40 F AND 80% RH
#74. When placing airmovers in a building that had water intrusion, the formula begins with each room receiving this many airmovers prior to affected area and inset/offset calculations answers A) 1 #75. When significant Carpet Delamination is discovered the restorer should answers D) document, communicate with materially interested parties, and most often recommend replacement #76. When the temperature of absorbed moisture in materials is increased, more energy is increased causing the answers C. Evaporation to increase #77. Reducing the water vapor content of air is answers A) dehumidification #78. When indoor conditions are 75 F (24 C) and 55% RH and no heating system is available the most appropriate outdoor conditions for considering an open drying system would be answers c #79. Wallboard covered with vinyl wallpaper can require special drying procedures answers A #80. Secondary damage caused by high humidity is most likely affect materials that are answers B. hygroscopic #81. The least amount of water absorption and evaporation load where wet porous materials rep less than ~5% of combined ceiling, walls, and flooring surface areas and where low evaporation materials and assemblies are minimally wet answers A) class 1 #82. A device used to measure temperature and relative humidity in air is called a answers C) thermo-hygrometer
#83. All persons required to use respiratory protection shall answers B? couldnt read answers #84. Products used to reduce, but not necessarily microorganisms from the answers D. #85. wood rot fungi can start growing at a moisture content at or above answers d. 20% #86. As moisture evaporates from a wet material, the surface of the material becomes answers A) cooler #87. The most effective type of dehumidifier to use when drying a dirt crawl space when outside air temp is 50 F (10 C) is a answers D. dessicant #88. On-going damage that occurs due to absorption of humidity into materials is referred to as answers B) secondary damage #9. A drying job should not be considered complete until answers D) moisture meter readings match the drying goals #0. The amount of moisture contained in an air sample as a percentage of the maximum amount the sample could contain at a significant temperature is answers C) relative humidity #1. A low-grain refrigerant (LGR) dehumidifier answers D) reduces vapor pressure below that of a conventional refrigerant
#98. When using conventional refrigerant dehumidifier that removes 115 pints at AHAM test with water intrusion with 22000 ft3 is answers B. #9. When using a desiccant dehumidifier that is rated to process 630 clm, the initial recommended number for consideration on a class 4 water intrusion in 4000 ft building with a 9 foot ceiling height A. 7 B. 5 C. 3 D. 1 answers C. 3 #10. After physically removing excess water, the time required to dry wet materials is influenced most by the A. Equilibrium moisture content B. Rate of evaporation C. Equilibrium relative humidity D. Fiber saturation point answers B. Rate of evaporation #101. Restorers should inspect, record, and monitor a restoration job at least A. Weekly B. Daily C. Every other day D. Every 3 days answers B. Daily #102. Refrigerant dehumidifier removes water vapor from the air through A. Condensation
B. Absorption C. Evaporation D. Adsorption answers A. Condensation #10. To determine an initial dehumidification capacity recommendation to effectively dry an affected area, restorers should know the answers c. changing water from a liquid to evaporation is answers c. evaporation when removing wet cushion (pads, underlay), carpet seams should be answers A. circulating air where visible or suspected contamination is present can answers D. a high potential for structural or microbial damage to hygroscopic materials occurs when relative humidity is answers c. 40% when drying an unfinished basement saturated with category 1 water and the indoor temperature is below 40 F, the project requires answers A. sublimental heat evaporation can occur at a greater rate when the material surface temperature is answers B the initial number of air movers to replace in scenario 1. the following diagram will be used to answer 110... answers
1 1. During the inspection process, restorers shall make a reasonable effort to
answers C. identify and address potential safety hazards
#10. When wet, a structural material that loses most of its structural integrity, but regains its strength when dry, is: answers Concrete #11 Initially, a method of search for abnormal moisture behind ceramic tile or resilient flooring can be accomplished by answers using a non-penetrating (non-invasive) moisture meter #12. To minimize damage and reduce drying time, reduce drying time, restorers should: answers begin mitigation as soon as safely possible #13. The moisture content of structural materials should be measured with a answers A. moisture meter #14. When accessible from below, to dry wet wood subflooring under stone or tile flooring, restorers can use low-humidity air and answers D. vapor barrier #15. Biocides designed to destroy or eliminate all forms of microbial life and their spores are answers D. sterilizers #16. When carpet is wet it can be delaminated by answers D. improper handling and disengaging #17. To minimize or control aerosolized soils or contaminants during restoration, restorers can: answers B. install one or more air filtration devices (AFDs) #18. When pre-existing damage is discovered, restorer should answers D. document and bring it to the attention of materially interested parties
#19. Rapid drying of structural materials is achieved by answers A. promoting evaporation and dehumidification or ventilation #20. When carpet and cushion (pad, underlay) are saturated with Category 3 water answers B. Both should be removed for proper disposal #21. To minimize safety concerns and to speed structural drying, gypsum board (drywall) ceilings that are saturated and sagging should be answers A. drained, removed quickly, and properly disposed #22. The force exerted by water molecules in the air on surrounding surfaces is answers b. Vapor Pressure (page 11) #23. Generally, fastest rate of evaporation from wet materials with a 70F (21C) surface temperature [0.67 VP] would be an environment with answers A. 60F (4C) and 80% RH #24. Two hazardous materials more likely found in older building that require compliance with laws and regulations when handled are answers C. lead-based paint and asbestos #25. As humidity ratio increases (or decreases) another psychrometric chart property that also increases (or decreases) is answers C. vapor pressure #26. Ventilating a structure during the initial stages of restoration can be effective way to enhance drying by reducing the build up of answers C. humidity #27. When using government-registered biocide, restorers shall answers C. apply according to label directions
#37. Water that originates from a sanitary water source and does not pose a substantial risk from exposure is answers A. category 1 #38. Before applying biocides in water-damaged structures, restorers should answers D. turn on the HVAC system to help spread biocides evenly #39. One of the primary purposes of the initial extraction is to answers D. contain migrating water #40. On a structural drying project, if indoor conditions are 88 F (31 C) and 60% RH, condensation begins to occur on structural materials with a surface temperature cooler than answers A) 72 F (22 C) #41. The ratio of the mass of water vapor to the mass of dry air in a given moist air sample usually expressed in grams per pound (grams per kilogram) of dry air is the answers C. Saturation factor #42. To effectively dry wood sub flooring below sheet vinyl flooring, restorers might need to answers B. remove and discard the vinyl covering #43. Water vapor pressure always seeks answers D. equilibrium #44. At a humidity ratio of 45 gpp (6.4 g/kg) and a temperature of 60 F (16 C), the relative humidity is answers B. 36% #45. After finished wood flooring has been dried to acceptable moisture content answers A. appropriate acclimation time may be required before refinishing
#46. When carpet has been affected by sewage and should be removed and any materially interested party disagrees, restorers can choose to answers B. clean and save the carpet if possible #47. As the air temperature increases, relative humidity answers B. decreases #48. Changing a solid directly into a vapor without going through a liquid phase is known as answers B) sublimation #49. According to ANSI/IIRC S500, an IEP is an answers A) indoor environment professional #50. The greatest amount of water absorption and evaporation load where wet porous materials represent more than ~40% of combined ceiling, walls, and flooring surface areas and where low evaporation materials and assemblies are minimally answers D. class 4
