Download IICRC Water Restoration Technician Exam: Questions and Answers and more Exams Water and Wastewater Engineering in PDF only on Docsity!
What document dictates the Standards for the Water Damage Restoration Industry? Correct Answer: ANSI/IICRC S- 500 Water Damage Standards What needs to be signed before restoration begins? Correct Answer: Work authorization Why do we extract water from carpet multiple times? Correct Answer: To reduce drying times After the water is extracted, what dictates the rate of drying? Correct Answer: Evaporation What should we do if we find pre-existing damage? Correct Answer: Take pictures, document, advise parties What tools are necessary to disengage the carpet?
IICRC WATER RESTORATION
TECHNICIAN EXAM | QUESTIONS & 100%
CORRECT ANSWERS (VERIFIED) | 2025 |
GRADE A+
Correct Answer: Knee kicker & awl What is delamination? Correct Answer: Separation of the primary and secondary backing What can cause delamination? Correct Answer: Improper handling and stretching What should we do if we discover significant Delamination on our project? Correct Answer: Document and report Is it OK to cut carpet seems? Correct Answer: Only as a last resort What is the purpose of the skin on carpet cushion? Correct Answer: Ease of installation Before a technician can wear a respirator, what needs to be done? Correct Answer: Medical evaluation and fit testing What is our first responsibility when arriving at any water loss? Correct Answer: Safety
How can we increase the rate of evaporation from wet drywall with vinyl wallpaper on it? Correct Answer: Inter-air drying How should we address blown cellulosic insulation in wall cavities when it becomes wet? Correct Answer: Remove it Why is plywood more restorable than particleboard? Correct Answer: Less processing If you have water trapped between plywood and sheet vinyl, what should you do? Correct Answer: Remove it Can we normally dry wet particleboard under sheet vinyl? Correct Answer: No Drying materials require us to control which two things...? Correct Answer: Evaporation and dehumidification Wet wood subflooring Under stone or tile drying strategy requires... Correct Answer: Small amounts of airflow and warm air
Can you use small amounts of airflow and warm air to dry concrete? Correct Answer: Yes What happens to the VP in a material when we heat it? Correct Answer: It increases When you increase vapor pressure by heating, what happens to material's potential for evaporation...? Correct Answer: It increases What happens if the material is cooler than the dewpoint temperature? Correct Answer: Condensation occurs, evaporation stops VP (vapor pressure) of material = high; VP of air = low. What will happen? Correct Answer: Evaporation Will occur Describe water phase changes Correct Answer: With the application of heat, ice turns to a liquid and (with more heat) liquid turns to a gas. The reversal happens with the removal of heat What does Hygroscopic mean? Correct Answer: Vapor absorbing
Correct Answer: When individuals are at risk or compromised The amount of water vapor mixed with a given volume of dry air is called Correct Answer: Grains per pound (GPP) The pressure exerted by the water (vapor) molecules in the air on surrounding surfaces is called Correct Answer: Vapor pressure When the air is at 100% Rh, it is also at its Correct Answer: Saturation point When vapor passes through solid material this is the materials... Correct Answer: Permeance What does it mean when we say, "nature always seeks an equilibrium?" Correct Answer: Areas of high vapor pressure seeks areas of low vapor pressure Considering the following measurements, which is the highest humidity ratio (or dewpoint temperature or vapor pressure) 90F/30% OR 40F/40% OR 50 F/80% OR 70 F/70% Correct Answer: 70 F/70%
Considering the following measurements, which is the lowest humidity ratio (or dewpoint temperature or vapor pressure) 90F/30% OR 40F/40% OR 50 F/80% OR 70 F/70% Correct Answer: 40 F/40% If the inside is "warm and wet" then what conditions would be necessary outside if we were to use the outdoor air to dry the structure? Correct Answer: Warmer and dryer Category one water; 45°F in the house. How would you address the drain? Correct Answer: Warm the structure up When water evaporates, does the surface become cooler or hotter? Why? Correct Answer: Cooler because the molecules absorb energy What relative humidity (and above) can support microbial growth? Correct Answer: 70% What should be indicated on that contract? Correct Answer: terms of payment What three pieces of information on the right hand side of the psychometric chart? Are they related to each other?
How many air movers are installed in each affected room to start? Correct Answer: 1 Add one air mover for every "how many" square feet of floor (including 2 feet up walls)? Correct Answer: 50 to 70 Add another air mover for every "how many" square feet for wet walls above 2 feet high? Correct Answer: 100 to 150 Add another air mover for every "what" that is larger than 18 inches? Correct Answer: Offset What tool do you use to remove moisture from the air? Correct Answer: Dehumidifier How does a refrigerant dehumidifier collect water vapor? Correct Answer: Through the process of condensation What temperature range do refrigerant dehumidifiers work best in? Correct Answer: 70 to 90°F When is mechanical dehumidification necessary?
Correct Answer: Always What are the residential performance environmental test conditions for refrigerant dehumidifiers? Correct Answer: The test conditions is at 80° at 60% relative humidity for 24 hours What measures to daily drying data include? Correct Answer: Atmospheric temperature changes/humidity ratio changes (including mechanical devices)/material moisture changes/material temperature changes What can an LGR do that I conventional refrigerant cannot? Correct Answer: Go down to 34GPP True or false: a refrigerant dehumidifier produces the lowest vapor pressure? Correct Answer: False Which dehumidifier would work best on a crawlspace that is open to cold, outdoor air? Correct Answer: Desiccant The IICRC formula requires three things to determine the initial D humidification needs... What are they? Correct Answer: cubic feet, class, dehumidifier type
Correct Answer: Sterilizer What must we follow every time we apply a government registered biocide? Correct Answer: Label and directions Should we use air movers on moldy surfaces? Correct Answer: No What should we do if we encounter mold on the job? Correct Answer: Investigate further What should we do if there's a disagreement and what is restorable on a sewage damage loss? Correct Answer: Stop work What PPE should a restorer where - at a minimum - on a category 3 loss? Correct Answer: Protective face mask, waterproof gloves, rubber boots What does classification refer to? Correct Answer: Rate of evaporation What is a class 1 water loss? Correct Answer: Less than 5% of the materials are affected
What is a Class 2 water loss? Correct Answer: Between 5 to 40% of materials are affected What is a Class 3 water loss? Correct Answer: Over 40% of the materials are affected What is the class 4 water loss? Correct Answer: Deeply held or bound (hard to dry) What is Category refer to? Correct Answer: Level of contamination What is a Category 1 water loss? Correct Answer: Does not pose substantial risk from exposure What is a Category 2 water loss? Correct Answer: Potential to cause discomfort or sickness What is a category 3 water loss? Correct Answer: Grossly contaminated and contains pathogenic agents What is a "special situation" water loss?
What else can a non-invasive moisture meter be used on? Correct Answer: Vinyl & ceramic How do you know if a material is sufficiently dry? Correct Answer: If you have reached your dry standard What meter do we use to measure temperature and humidity? Correct Answer: Thermal hydrometer How often should we inspect restorative drying projects? Correct Answer: Daily What is a hardwood floor that is water on the bottom and the top look like? Correct Answer: Cupping When should you establish hardwood floor drying goals? Correct Answer: At the start of the job How do you know if the hardwood floor is dry enough? Correct Answer: When the cupping is gone & the hardwood is within 2 - 4% points of the substrate
When can you refinish the hardwood floor? Correct Answer: After acclimation What moisture content in wood can support "wood rot"? Correct Answer: 20% moisture content and above A healthy relative humidity should not exceed Correct Answer: 60% Acceptable range for an indoor relative humidity Correct Answer: 30 - 50 2 hazardous material that may be present in older structures Correct Answer: Lead and Asbestos Psychometry is the study of Correct Answer: Air, humidity and temperature Suggested temp for dry bulb 70 - 85 degrees Below 70 can slows above Correct Answer: As air temperature increases
When does humidity become saturated Correct Answer: 100% RH How many degrees above dewpoint for drying Correct Answer: atleast 20 degrees GPP Correct Answer: The weight of the water vapor in the air Vaper pressure calculation Correct Answer: Vp material - vp air= vp differential Humidity Ratio is measured in Correct Answer: GPP Humidity ratio is directly related to Correct Answer: Dewpoint and vapor pressure Adhesives losses what perfect of stretch when wet Correct Answer: 89 - 85% Moisture sensor is only used to
Correct Answer: Determine the perimeter of water migration in carpet, underpayment and pads Thermal imaging Correct Answer: detects temperature differences and may indicate where moisture is 2 types of moisture meter Correct Answer: Invasive(pin) and non invasive (scan) 2 types of invasive probes Correct Answer: Insulated and non insulated Penetrating measure meter measures Correct Answer: What can be don't you decrease drying time Correct Answer: Air warmer and dryer and extraction What is humidity directly related to Correct Answer: Dewpoint, vaper pressure What temperature will increase the rate of drying Correct Answer: Above 70
