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IICRC WRT Exam: Comprehensive Questions and Answers for Water Damage Restoration, Exams of Water and Wastewater Engineering

A comprehensive set of questions and answers related to the iicrc wrt exam, covering key concepts in water damage restoration. It includes topics such as moisture detection, drying methods, dehumidification, and biocide application. Useful for individuals preparing for the iicrc wrt exam, offering a practical overview of essential knowledge.

Typology: Exams

2024/2025

Available from 02/11/2025

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IICRC WRT EXAM (2 VERSIONS) | NEWEST
ACTUAL EXAM COMPREHENSIVE
QUESTIONS AND VERIFIED ANSWERS
GRADED A+ | 100% PASS | 2025 UPDATE!
This material loses most of its structural integrity when wet but regains
its strength when dry: - โœ”โœ”โœ” Correct Answer > Gypsum wallboard
or carpet
A _____________ can be used to determine the extent of water
migration in carpet and pad - โœ”โœ”โœ” Correct Answer > moisture
sensor
when air is holding the maximum amount of water vapor possible at a
given temperature, the air is _____________ - โœ”โœ”โœ” Correct Answer
> Saturated
the temp of affected areas and the ____________ of wet materials
significantly impacts the rate of evaporation - โœ”โœ”โœ” Correct Answer
> temp
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Download IICRC WRT Exam: Comprehensive Questions and Answers for Water Damage Restoration and more Exams Water and Wastewater Engineering in PDF only on Docsity!

IICRC WRT EXAM (2 VERSIONS) | NEWEST

ACTUAL EXAM COMPREHENSIVE

QUESTIONS AND VERIFIED ANSWERS

GRADED A+ | 100% PASS | 2025 UPDATE!

This material loses most of its structural integrity when wet but regains its strength when dry: - โœ”โœ”โœ” Correct Answer > Gypsum wallboard or carpet A _____________ can be used to determine the extent of water migration in carpet and pad - โœ”โœ”โœ” Correct Answer > moisture sensor when air is holding the maximum amount of water vapor possible at a given temperature, the air is _____________ - โœ”โœ”โœ” Correct Answer

Saturated the temp of affected areas and the ____________ of wet materials significantly impacts the rate of evaporation - โœ”โœ”โœ” Correct Answer temp

_______________ do not detect moisture but can be a useful tool in identifying potentially wet materials - โœ”โœ”โœ” Correct Answer > Infrared Cameras or Thermal Imagine as moisture evaporates from materials the surface of that materials becomes _____________ - โœ”โœ”โœ” Correct Answer > cooler Thermo-hygrometer - โœ”โœ”โœ” Correct Answer > measures temperature and humidity Moisture levels of structural materials are measured and dry standards are determined using a _______________________ - โœ”โœ”โœ” Correct Answer > moisture meter To locate moisture beneath ceramic tile restorers should use a _____________ moisture meter - โœ”โœ”โœ” Correct Answer > non- invasive or non penetrating ________________ is always removed in both Cat 2 & 4 water damages

  • โœ”โœ”โœ” Correct Answer > Carpet cushion or pad Damage particle board should be ___________ and _____________________ - โœ”โœ”โœ” Correct Answer > removed and replaced

As air temp increases, relative humidity ______________ - โœ”โœ”โœ” Correct 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: - โœ”โœ”โœ” Correct Answer > humidity ratio (GPP) As humidity ratio increases (or decreases) another psychrometric property that also increases (or decreases) is: - โœ”โœ”โœ” Correct Answer

dew point and vapor pressure The pressure exerted by vapor molecules on surrounding surface is _________________ - โœ”โœ”โœ” Correct Answer > Vapor Pressure Water vapor pressure always seeks - โœ”โœ”โœ” Correct Answer > Equilibrium If vapor pressure in ambient air is lower than the vapor pressure in wet materials the outcome will be - โœ”โœ”โœ” Correct Answer > condensation Blowing air into wall cavities helps them dry by enhancing the rate of - โœ”โœ”โœ” Correct Answer > evaporation

the temp at which humidity in the air reaches saturation (100% RH) is ________ ________ _________ - โœ”โœ”โœ” Correct Answer > dew point temp Maintaining a surface temp above ____ ____ will allow evaporation to occur - โœ”โœ”โœ” Correct Answer > Dew Point ___________________________ is the process of changing liquid too a vapor - โœ”โœ”โœ” Correct Answer > evaporation the greater the temp of wet materials, the more ______ is available for evaporation to occur - โœ”โœ”โœ” Correct Answer > energy Adding ______ (heat) to materials promotes drying - โœ”โœ”โœ” Correct Answer > Energy Increasing the temp of wet materials or assemblies , which in turn increases the material's _________ ___________, can be done through many systems, including the application of direct heat. - โœ”โœ”โœ” Correct Answer > vapor pressure an _____ drying system utilizes outdoor air to reduce indoor humidity.

  • โœ”โœ”โœ” Correct Answer > OPEN

Refrigerant dehumidifiers remove moisture from the air through the process of - โœ”โœ”โœ” Correct Answer > condensation Optimal performance range for refrigerants in between - โœ”โœ”โœ” Correct Answer > 70 - 90 degrees F A low grain refrigerant (LGR) dehumidifier reduces vapor pressure below a _____________ refrigerant. - โœ”โœ”โœ” Correct Answer > conventional Which type of dehumidifier produces the lowest vapor pressure air? - โœ”โœ”โœ” Correct Answer > Desiccant The most effective dehumidifier to use when drying a cold, wet crawlspace would be a _______ - โœ”โœ”โœ” Correct Answer > Desiccant When using an LGR dehu in a class 3 water intrusion containing 17, ft cubed, the initial water removal recommended is _______ PPD - โœ”โœ”โœ” Correct 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 _______ - โœ”โœ”โœ” Correct 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 ______ - โœ”โœ”โœ” Correct Answer > 1 A _________ is a diagram of the affected area showing extent of water migration. - โœ”โœ”โœ” Correct Answer > Moisture Map Circulating air where contamination is present can increase the likelihood of contaminating ______________ areas. - โœ”โœ”โœ” Correct Answer > Unaffected Before applying biocides, restorers should advise customers to ________ the structure for the period of time during and after application. - โœ”โœ”โœ” Correct Answer > vacate Products used to reduce, but not necessarily eliminate, microorganisms to levels considered safe as determined by public health codes or regulations: - โœ”โœ”โœ” Correct Answer > Sanitizers Products that kill or inactivate at least 99% of disease-producing (pathogenic) microorganisms on inanimate objects but not necessarily their spores: - โœ”โœ”โœ” Correct Answer > Disinfectants

Water damage restoration work never begins without a signed - โœ”โœ”โœ” Correct Answer > work authorization To minimize damage to building materials and contents, restorers should perform _______________________________________ as part of the preliminary inspection. - โœ”โœ”โœ” Correct Answer > Loss mitigation services When pre-existing damage is discovered, technicians should ___________________ and ____________________ to all materially interested parties. - โœ”โœ”โœ” Correct Answer > document and communicate Technicians should always use a _______________________ and a _______________________ to disengage carpet from the tackless strip.

  • โœ”โœ”โœ” Correct Answer > knee kicked and carpet awl The primary reasons for carpet delimitations are: - โœ”โœ”โœ” Correct 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. - โœ”โœ”โœ” Correct Answer > Hygroscopic Above __________% RH supports microbial growth and secondary damage can occur in hygroscopic materials. - โœ”โœ”โœ” Correct Answer > 60% Category _____ water originated from a sanitary source and does not pose substantial risk to humans. - โœ”โœ”โœ” Correct Answer > 1 Category ____ water contains significant contamination and has the potential to cause discomfort or sickness if contacted or consumed by humans - โœ”โœ”โœ” Correct Answer > 2 In a Category 3 water intrusion with elevated risk situations, restorers should consider using an ______________________________________ to assist in a remediation assessment. - โœ”โœ”โœ” Correct Answer > Indoor environmental Professional (IEP) When working contaminated environments technicians should erect ________________________, done appropriate __________, and install ______________________. - โœ”โœ”โœ” Correct Answer > Containment, PPE, Air filtration device (AFD)

Gypsum board that is saturated and sagging should safely ___________ and _________. - โœ”โœ”โœ” Correct Answer > Drained and removed When inspecting a water damaged structure, techs should inspect all ___________________ areas - โœ”โœ”โœ” Correct Answer > potentially affected Class ___ water losses contain the least amount of water absorption and evaporation load where wet, porous materials represent less than 5% of the combined floor, wall and ceiling surface area in the space - โœ”โœ”โœ” Correct Answer > 1 Class ____ water losses contain a significant amount of water absorption and evaporation load where wet, porous materials represent 5%-40% of the combined, floor, wall and ceiling surface area in the space - โœ”โœ”โœ” Correct Answer > 2 The greatest amount of water absorption and evaporation load where wet, porous materials represent more than 40% of the combined wall, floor, and ceiling surface areas and where low evaporation materials or assemblies have absorbed minimal moisture is a Class___________ - โœ”โœ”โœ” Correct Answer > 3 Water intrusion that involves a significant amount of water absorption bound within low evaporation materials and may require longer drying times is a class ____ - โœ”โœ”โœ” Correct Answer > 4

moisture detection equipment should be used to measure and document ___________________ and _______________________________. - โœ”โœ”โœ” Correct Answer > Moisture content and relative humidity readings. when using a desiccant dehu that is rated to process 400 CFM the initial recommended number on a class 4 water loss in a 5,000 sq ft building with 8 ft ceiling height is - โœ”โœ”โœ” Correct Answer > 5 a 12 ft x 14 ft room with 4 inches of water contains approx. ______ gallons of water. - โœ”โœ”โœ” Correct Answer > 418 The number of gallons present in a water loss that is 3ft 9 inches in depth in a 22 ft x 30' basement is - โœ”โœ”โœ” Correct Answer > 18, What is the dew point temp when the humidity ratio % is 132 GPP? - โœ”โœ”โœ” Correct Answer > 75 degrees F On a drying project, the indoor conditions are 80% F and 70% RH. What temp is needed to brin the RH to 35%? - โœ”โœ”โœ” Correct Answer > 102 - 103 degrees F