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IICRC Water Restoration Technician Verified Questions
and Answers latest Updates 2024
What document dictates the Standards for the Water Damage Restoration Industry? ✓ ANSI/IICRC S-500 Water Damage Standards
What needs to be signed before restoration begins? Work authorization ✓ Why do we extract water from carpet multiple times?
✓ To reduce drying times
After the water is extracted, what dictates the rate of drying? ✓ Evaporation
What should we do if we find pre-existing damage?
✓ Take pictures, document, advise parties
What tools are necessary to disengage the carpet? ✓ Knee kicker & awl
What is delamination?
✓ Separation of the primary and secondary backing
What can cause delamination?
✓ Improper handling and stretching
What should we do if we discover significant Delamination on our project? ✓ Document and report
Is it OK to cut carpet seems?
✓ Only as a last resort
What is the purpose of the skin on carpet cushion?
✓ Ease of installation
Before a technician can wear a respirator, what needs to be done? ✓ Medical evaluation and fit testing
What is our first responsibility when arriving at any water loss?
✓ Safety
Name two substances found in construction that are federally regulated ✓ Lead and asbestos
For safety with what should all are drying equipment be equipped?
✓ Ground plug
What should we do with equipment that has damaged electrical cords?
✓ Remove from service and replace the cords
What is the most critical course of action when we get a water damage loss? ✓ Respond quickly
What is the purpose of the initial extraction? ✓ To quickly contain moisture migration
Can drywall be restored after it becomes wet? ✓ Yes
What should we do with ceilings that are sagging and wet?
✓ Remove them
Is vinyl wallpaper a vapor barrier?
✓ Yes
How can we increase the rate of evaporation from wet drywall with vinyl wallpaper on it?
✓ Inter-air drying
How should we address blown cellulosic insulation in wall cavities when it becomes wet? ✓ Remove it
Why is plywood more restorable than particleboard?
✓ Less processing
If you have water trapped between plywood and sheet vinyl, what should you do?
✓ Remove it
Can we normally dry wet particleboard under sheet vinyl?
✓ No
Drying materials require us to control which two things...? ✓ Evaporation and dehumidification
Wet wood subflooring Under stone or tile drying strategy requires...
✓ Small amounts of airflow and warm air
The amount of water vapor mixed with a given volume of dry air is called ✓ Grains per pound (GPP)
The pressure exerted by the water (vapor) molecules in the air on surrounding surfaces is called ✓ Vapor pressure
When the air is at 100% Rh, it is also at its
✓ Saturation point
When vapor passes through solid material this is the materials…
✓ Permeance
What does it mean when we say, “nature always seeks an equilibrium?” ✓ 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%
✓ 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% ✓ 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? ✓ Warmer and dryer
Category one water; 45°F in the house. How would you address the drain?
✓ Warm the structure up
When water evaporates, does the surface become cooler or hotter? Why?
✓ Cooler because the molecules absorb energy
What relative humidity (and above) can support microbial growth? ✓ 70%
What should be indicated on that contract?
✓ terms of payment
What three pieces of information on the right-hand side of the psychometric chart? Are they related to each other? ✓ GPP humidity ratio/dewpoint/vapor pressure. They are related to each other only in the way they move
Inside of the house is 75°F and 60% relative humidity. How cold is the windows have to be in order to collect condensation? ✓ 60
If the humidity ratio is 45GPP at 80°F... What is the relative humidity? ✓ 29%
At 70°F and 60% relative humidity... What temperature is required to bring relative humidity to 30%? ✓ 92
How do you determine cubic feet in a room?
✓ Length by width by height
How many gallons are in a cubic foot of water? ✓ 7.
How many gallons are in a basement that is 40' x 30' with a 4'3" water depth?
✓ 38,
How many air movers are installed in each affected room to start?
✓ 1
Add one air mover for every "how many" square feet of floor (including 2 feet up walls)?
✓ 50 to 70
Add another air mover for every "how many" square feet for wet walls above 2 feet high? ✓ 100 to 150
Add another air mover for every "what" that is larger than 18 inches?
✓ Offset
What tool do you use to remove moisture from the air?
✓ Dehumidifier
How does a refrigerant dehumidifier collect water vapor?
✓ Through the process of condensation
What temperature range do refrigerant dehumidifiers work best in? ✓ 70 to 90°F
When is mechanical dehumidification necessary?
✓ Always
What must we follow every time we apply a government registered biocide?
✓ Label and directions
Should we use air movers on moldy surfaces? ✓ No
What should we do if we encounter mold on the job?
✓ Investigate further
What should we do if there's a disagreement and what is restorable on a sewage damage loss? ✓ Stop work
What PPE should a restorer where - at a minimum - on a category 3 loss? ✓ Protective face mask, waterproof gloves, rubber boots
What does classification refer to?
✓ Rate of evaporation
What is a class 1 water loss?
✓ Less than 5% of the materials are affected
What is a Class 2 water loss?
✓ Between 5 to 40% of materials are affected
What is a Class 3 water loss?
✓ Over 40% of the materials are affected
What is the class 4 water loss? ✓ Deeply held or bound (hard to dry)
What is Category referring to? ✓ Level of contamination
What is a Category 1 water loss?
✓ Does not pose substantial risk from exposure
What is a Category 2 water loss?
✓ Potential to cause discomfort or sickness
What is a category 3 water loss?
✓ Grossly contaminated and contains pathogenic agents
What is a "special situation" water loss?
✓ When that contains lead or asbestos
What is the carpet cushion always get replaced?
✓ Category 2 & Category 3
What should you wear on a category 3 loss?
✓ hard hat, eye protection, respiratory protection, gloves, appropriate gloves, knee pads, rubber boots
Where should we expect when conducting our initial inspection?
✓ Everywhere
What meter should we use on the initial inspection?
✓ Noninvasive
What tools can we used to determine where the water has migrated in carpet and pad?
✓ Moisture sensor
Do you use meters or sensors to determine if the material sufficiently dry?
✓ Meters
What meter do we use to detect moisture under sheet vinyl flooring?
✓ Non invasive
What else can a non-invasive moisture meter be used on? ✓ Vinyl & ceramic
How do you know if a material is sufficiently dry?
✓ If you have reached your dry standard
What meter do we use to measure temperature and humidity?
✓ Thermal hydrometer
How often should we inspect restorative drying projects?
✓ Daily
What is a hardwood floor that is water on the bottom and the top look like?
✓ Cupping
When should you establish hardwood floor drying goals? ✓ At the start of the job
How do you know if the hardwood floor is dry enough?
✓ When the cupping is gone & the hardwood is within 2-4% points of the substrate
When can you refinish the hardwood floor?
How many degrees above dewpoint for drying?
✓ at least 20 degrees
GPP
✓ The weight of the water vapor in the air
Vaper pressure calculation
✓ Vp material - vp air= vp differential
Humidity Ratio is measured in
✓ GPP
Humidity ratio is directly related to
✓ Dewpoint and vapor pressure
Adhesive’s losses what perfect of stretch when wet
✓ 89-85%
Moisture sensor is only used to ✓ Determine the perimeter of water migration in carpet, underpayment and pads
Thermal imaging
✓ detects temperature differences and may indicate where moisture is
2 types of moisture meter
✓ Invasive(pin) and non-invasive (scan)
2 types of invasive probes
✓ Insulated and non-insulated
Penetrating measure meter measures
✓ temperature in liquids and semi-solid substances
What can be don't you decrease drying time ✓ Air warmer and dryer and extraction
What is humidity directly related to
✓ Dewpoint, vaper pressure
What temperature will increase the rate of drying
✓ Above 70
What could happen to humidity was to exceed 70%
✓ Secondary damage and microorganisms’ growth
When can secondary damage occur
✓ Above 60%
What is permeance ✓ Speed at which water can move through material
What is air saturated with moisture
✓ Dewpoint
Tool to disengage carpet
✓ Using a knee kick abs carpet awl
Cat 3 losses substrate subfloor should be
✓ Decontaminated or replace
Purpose or carpet cushion
✓ Aid abs install
