Download IICRC WRT Exam Study Guide (2024/2025) | Actual Questions and Answers Latest Updated 2024/ and more Exams Biology in PDF only on Docsity!
IICRC WRT Exam Study Guide ( 2024 /2025) | Actual Questions and Answers
Latest Updated 2024/2025 (Graded A+)
A first priority on every water loss is to conduct a Answer ✔✔Hazard and risk assessment All technicians required to wear respiratory protection must be: Answer ✔✔Trained, Fitted for mask and evaluated medically. Two hazardous materials commonly found in older structures are Answer ✔✔Lead and Asbestos Water damage restoration work never begins without a signed Answer ✔✔work authorization To minimize damage to building materials and contents, restorers should perform _______________________________________ as part of the preliminary inspection. Answer ✔✔Loss mitigation services When pre-existing damage is discovered, technicians should ___________________ and ____________________ to all materially interested parties. Answer ✔✔document and communicate Technicians should always use a _______________________ and a _______________________ to disengage carpet from the tackless strip. Answer ✔✔knee kicked and carpet awl The primary reasons for carpet delimitations are: Answer ✔✔Damage due to water Folding of wet carpet during pad removal Over aggressive extraction Dragging heavy items Alot of foot traffic Improper install Pet urine
Secondary damage is most prevalent in ___________________ materials. Answer ✔✔Hygroscopic Above __________% RH supports microbial growth and secondary damage can occur in hygroscopic materials. Answer ✔✔60% Category _____ water originated from a sanitary source and does not pose substantial risk to humans. Answer ✔✔ 1 Category ____ water contains significant contamination and has the potential to cause discomfort or sickness if contacted or consumed by humans Answer ✔✔ 2 In a Category 3 water intrusion with elevated risk situations, restorers should consider using an ______________________________________ to assist in a remediation assessment. Answer ✔✔Indoor environmental Professional (IEP) When working contaminated environments technicians should erect ________________________, done appropriate __________, and install ______________________. Answer ✔✔Containment, PPE, Air filtration device (AFD) When working in a CAT 3 water loss the PPE should consist of: Answer ✔✔All of it: full face respiratory mask protective suit waterproof gloves water proof boots If at any time during the remediation of a cat 3 loss, any materially interested party disagrees with how the remediation processes will be performed, restorers should ____________ immediately until the conflict is resolved. Answer ✔✔STOP Which property of a material more relates to water vapor passing through or out of it? Answer ✔✔Permeance
Thermo-hygrometer Answer ✔✔measures temperature and humidity Moisture levels of structural materials are measured and dry standards are determined using a _______________________ Answer ✔✔moisture meter To locate moisture beneath ceramic tile restorers should use a _____________ moisture meter Answer ✔✔non-invasive or non penetrating _______________ do not detect moisture but can be a useful tool in identifying potentially wet materials Answer ✔✔Infrared Cameras or Thermal Imagine as moisture evaporates from materials the surface of that materials becomes _____________ Answer ✔✔cooler ________________ is always removed in both Cat 2 & 4 water damages Answer ✔✔Carpet cushion or pad Damage particle board should be ___________ and _____________________ Answer ✔✔removed and replaced This material loses most of its structural integrity when wet but regains its strength when dry: Answer ✔✔Gypsum wallboard or carpet Multiple extraction passes greatly _______ drying times Answer ✔✔reduces After physically removing excess water, the time required to dry wet materials is determined by the rate of ____________ Answer ✔✔evaporation. Waster water shall be disposed of in accordance with applicable local, state and federal ___________________ Answer ✔✔regulations
The number of gallons present in standing water that is 3ft 9 inches deep in an 18 x 26 foot basement is: Answer ✔✔13,127.40 gallons __________, ____________, and ___________, have a direct influence on the time it takes to return wet materials to an acceptable drying goal. Answer ✔✔Humidity, airflow and temperature. the amount of moisture in a volume of air expressed as a percentage of the maximum amount of moisture that volume could contact at a specified temperature is ____________________. Answer ✔✔Relative humidity % As air temp increases, relative humidity ______________ Answer ✔✔decreases the ratio of the mass of water vapor to the mass of dry air in a given moist air sample, expressed in grains per pound of dry air is: Answer ✔✔humidity ratio (GPP) As humidity ratio increases (or decreases) another psychrometric property that also increases (or decreases) is: Answer ✔✔dew point and vapor pressure The pressure exerted by vapor molecules on surrounding surface is _________________ Answer ✔✔Vapor Pressure Water vapor pressure always seeks Answer ✔✔Equilibrium If vapor pressure in ambient air is lower than the vapor pressure in wet materials the outcome will be Answer ✔✔condensation Blowing air into wall cavities helps them dry by enhancing the rate of Answer ✔✔evaporation the temp at which humidity in the air reaches saturation (100% RH) is ________ ________ _________ Answer ✔✔dew point temp
I airflow is allowed to exceed dehumidification then ____________ damage can occur due to uncontrolled humidity. Answer ✔✔Secondary _________ __________ ___________ are used to remove airborne contaminents. Answer ✔✔Air Filtration Devices (AFD) ___________are used to remove moisture (water vapor) from the air) Answer ✔✔dehumidifiers Refrigerant dehumidifiers remove moisture from the air through the process of Answer ✔✔condensation Optimal performance range for refrigerants in between Answer ✔✔ 70 - 90 degrees F A low grain refrigerant (LGR) dehumidifier reduces vapor pressure below a _____________ refrigerant. Answer ✔✔conventional Which type of dehumidifier produces the lowest vapor pressure air? Answer ✔✔Desiccant The most effective dehumidifier to use when drying a cold, wet crawlspace would be a _______ Answer ✔✔Desiccant When using an LGR dehu in a class 3 water intrusion containing 17,000 ft cubed, the initial water removal recommended is _______ PPD Answer ✔✔425 PPD when using an LGR that removed 130 pints per day (PPD) at AHAM test conditions, the recommended number of dehus initially on a class 2 water intrusion with 35,000 ft cubed is _______ Answer ✔✔ 6 When using a desiccant dehu that is rated to process 400 cfm, the initial recommended number on a class 4 water intrusion in a 5,000 sqft building with 8 foot ceiling height is ______ Answer ✔✔ 1
A _________ is a diagram of the affected area showing extent of water migration. Answer ✔✔Moisture Map Circulating air where contamination is present can increase the likelihood of contaminating ______________ areas. Answer ✔✔Unaffected Before applying biocides, restorers should advise customers to ________ the structure for the period of time during and after application. Answer ✔✔vacate Products used to reduce, but not necessarily eliminate, microorganisms to levels considered safe as determined by public health codes or regulations: Answer ✔✔Sanitizers Products that kill or inactivate at least 99% of disease-producing (pathogenic) microorganisms on inanimate objects but not necessarily their spores: Answer ✔✔Disinfectants When applying biocides or antimicrobials techs SHALL follow the Answer ✔✔label instructions for proper application Drying equipment is only completely removed once materials and environments have been returned to their ________ Answer ✔✔dry goal When moisture causes the edges of wood flooring to rise up higher than the center due to moisture absorption across the bottom of the board, the planks are ____________ Answer ✔✔cupping or cupped After wood flooring has dried allow sufficient _________________ time before refinishing them. Answer ✔✔acclimation When using an LGR dehu in a Class 3 water intrusion, containing 17,000ft cubed the initial water removal recommended is Answer ✔✔425PPD When using an LGR that removed 130 Pints per day at AHAm test conditions, the recommended number of installed DEHUS installed initially on a class 2 water loss with 35,000ft cubed is Answer ✔✔ 6
