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214 Cards in this Set
- Front
- Back
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What document dictates the standards for water damage restoration industry? |
ANSI S500 |
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What needs to be signed before restoration begins? |
Authorization |
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What should be indicated on that contract? |
Scope of work and payment |
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Why do we install furniture pads and blocks under furniture? |
To prevent secondary damage |
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What should a restorer consult their physician about? |
Immunization |
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Before technician can wear a respirator, what needs to be done first? |
Fit test |
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Why do we extract water from carpet? |
Speed up dry time |
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After the water is extracted, what dictates the rate of drying? |
Dehumidification and evaporation |
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What should we do if we find pre-existing damage? |
Communicate photos document and inform all invested parties |
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What 2 tools are necessary to disengage the carpet |
Carpet awl and knee kicker |
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What is delamination ? |
Separation of primary and secondary backing |
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What can cause delamination? |
Folding, bending, aggressive extraction, improper disengaging |
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What should we do if we discover significant delamination on our project |
Note, photo, and communicate with all invested parties |
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Is it ok to cut carpet seems? |
Only as a last resort |
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What is the purpose of the skin on carpet cushion? |
To ease installation |
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What is our first responsibility when arriving at a sewage loss? |
PPE’s |
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What is the most common safety hazard on a water damage loss? |
Slip and fall |
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Name 2 substances found in construction that are federally regulated? |
Lead and asbestos |
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For safety, with what should all our drying equipment be equipped? |
GFCI, safety screens |
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What should we do with equipment that has damaged electrical cords? |
Remove and replace |
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Where do we dispose of the water we collect on a water damage loss? |
Sanitary sewer |
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What must we do before we apply a biocide into a structure? |
Have customer read label and sign waiver, clear area until deemed suitable |
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What is a solution called when it reduces, but doesn’t eliminate germs? |
Sanitizer |
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What is a solution called when it is used to produce a surface absent of life? |
Sterilizer |
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What must we follow every time we apply a government registered biocide? |
MSDS |
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What is the best way to control mold growth? |
Dry fast |
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What does mold produce that can make you sick? |
Mycotoxins |
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Should we use air movers on moldy surfaces? |
No |
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What should we do if we encounter mold on the job? |
Stop and put on PPE‘s |
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What should we do if there is a disagreement in what is restorable on a sewage damage loss |
Stop |
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What does classification refer to? |
The rate of evaporation |
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What is Class 1 water loss? |
Less than 5% |
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What is a class 2 Water loss? |
5% to 40% |
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What is a class 3 water loss? |
Above 40% |
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What is a class 4 water loss? |
Specialty equipment |
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What does category refer to? |
Level of contaminants |
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What is a category 1 water loss? |
Sanitary water source |
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What is a category 2 water loss? |
Significant amount of contaminants |
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What is a category 3 water loss? |
Grossly contaminated |
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What is a special situation water loss? |
Hazardous material |
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When does carpet cushion always get replaced? |
Cat 2 & 3 |
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What should you wear on a category 3 loss? |
PPE’s |
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Where should we inspect when conducting our initial inspection? |
Everywhere |
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What tool do we use to find the perimeter of water in carpet and pad |
Moisture sensor |
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What tool do we use to find the perimeter of water in carpet and pad |
Moisture sensor |
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What device do we use to detect moisture in materials |
Moisture meter |
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What meter do we use to detect moisture under sheet vinyl flooring |
Non-invasive |
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What else can a non-invasive moisture meter be used on |
Tile wood and vinyl |
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How do we know if a material is sufficiently dry? |
When dry goals are met |
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Do you use meters or sensors to determine if the material is sufficiently dry? |
Meter |
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What do we use to measure temperature and humidity? |
Thermo hygrometer |
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How often should we inspect our restorative drying projects? |
Daily |
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What does a hardwood floor that is wet or on the bottom then the top look like? |
Cupped |
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When should you establish hardwood floor dry angles? |
The beginning |
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How do you know if a hardwood floor is dry enough? |
With in 2 to 4% of Dry goal |
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How do we know when we have dried wood subfloor below a hardwood floor enough? |
When we reach within 2 to 4% |
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When can we refinish the hardwood floor? |
After It has acclimated |
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What moisture content and Wood can’t support wood rot? |
20% |
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What is the most critical course of action when we get a water damage loss? |
Time |
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What is the purpose of the initial extraction? |
To speed up dry time |
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Can drywall be restored after it becomes wet? |
Yes |
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Does it become weaker once dried? |
No it becomes stronger |
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What should we do with ceilings that are sagging and wet? |
Drain and remove |
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Is vinyl wallpaper a vapor barrier? |
Yes |
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How can we increase the rate of evaporation from wet drywall with vinyl wallpaper on it? |
Ventilate wall cavity |
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What happens to blown in insulation in wall cavities when it becomes wet? |
It compresses and loses R-value |
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If water is trapped under plastic laminate flooring what should you do? |
Remove |
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Why is plywood more restorable than particleboard? |
In the process |
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If you have water trapped between plywood and sheet vinyl, what should you do? |
Remove vinyl |
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Can we normally dry particleboard under sheet vinyl? |
No |
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What can we do with wet documents/books that are only wet with clean water? |
Freeze dry |
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Restorative drying is? |
Restoring dwelling to pre-loss condition’s |
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Drying materials week requires us to control two things? |
Temperature and relative humidity |
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Floating on wall-to-wall carpeting uses the carpet to? |
Contain |
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Wet wood sub flooring under stone or tile drain strategy requires: |
Heat tent and vent |
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Can you use this technique above with concrete to? |
Yes |
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What happens to VP any material when we heat it? |
Increases |
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Versus what happens to its potential for evaporation? |
Increases |
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What happens if the material is cooler than the dewpoint temperature? |
Condensation |
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Vapor pressure of material = high; VP of air= low. What will happen? |
Evaporation |
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Review water phase changes? |
Energy defines the state |
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What does hydroscopic mean? |
Absorbent material |
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Describe some examples of secondary damage? |
Surface growth mold delamination |
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Does secondary damage happened on hygroscopic or non-hygroscopic material? |
Hygroscopic |
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What is balance drying system? |
The GPs going out is lower then the GPP’s going in |
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If you use the outdoor air in your drain process, is that an open or closed drying system? |
Open |
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How do you know which strategy to use? |
When GPP are lower and Nguyen do. It is not a factor |
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What does an air Filtration device do? |
Removes particulates |
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When Should an indoor environmental professional IEP be used? |
When you smell mold |
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Yeah amount of water vapor that a volume of air contains by weight is called: |
GPP or Grains per pound |
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The pressure exerted by the molecules of a liquid on the surrounding surfaces is called: |
Vapor pressure |
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When the air is at 100% relative humidity, it also at its: |
Dewpoint or saturation |
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When vapor passes through a solid material, this is the materials: |
Permeance |
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What does it mean when we say nature always seeks in equilibrium? |
High-pressure seeks low pressure |
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Which has the highest and lowest humidity ratio parentheses or dewpoint temperature or vapor pressure A. 90°F/30% B. 40°F/40% C. 50°F/80% D. 70°F/70% |
B. 40°F/40% lowest D. 70°F/70%Highest |
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If the inside is warm and wet, then what conditions would be necessary outside if we were to use outdoor air to dry the structure? |
Warmer and dryer |
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Category one; 45°F in the house. How would you address the drying? |
By raising the temperature |
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When water evaporator, does the surface become cooler or hotter? Why? |
Surface becomes cooler because the molecules are being pulled away |
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What holds more water: cold air or warm air? |
Warm air |
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If air temperature increases, does the air hold more water? |
Yes |
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Does evaporation happen best in cold air or warm air? |
Warm air |
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What three things do we need to understand in order to dry structures effectively? |
Humidity airflow and temperature hat |
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The amount of moisture contained in the air, as compared to the maximum amount the air could hold at that temperature is called: |
Dew point |
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A conventional refrigerant starts to flatline When fed with air that is below what humidity ratio? |
55 |
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What temperature range do refrigerant DP dehumidifiers work best in? |
70 to 90° |
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What three pieces of information are on the right hand side of the Psychometry chart? Are they related to each other? |
Humidity ratio/GPP’s of dry air, dewpoint, vapor pressure |
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What relative humidity must we never exceed? Why? |
60% surface growth |
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Inside of house equals 75°/60%. How cold does the window have to be in order to collect condensation? |
60° |
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Humidity ratio is 45GPP; 80°F... what is the relative humidity? |
29% |
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70°F/60% – – what temperature is required to bring the rich relative humidity to 30%? |
92° |
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How do you determine cubic feet in a room? |
LxWxH |
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How many gallons in a cubic foot of water? |
7.48 |
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How much does a gallon weigh? |
8.34 |
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How many gallons are in a basement 40 X 30 with a 4’3” water depth? |
LXWXH X7.48 |
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What tool do you use to remove moisture from air? |
Dehumidifier |
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How does a refrigerant dehumidifier collect water vapor? |
Condensing |
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When is mechanical dehumidification necessary? |
Always |
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What are residential performance environmental test conditions for refrigerant dehumidifiers? |
80° 60% 24 hours |
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What measures do daily drying data include? |
Inside/outside affected/non-affected equipment HVAC moisture |
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What conditions do refrigerants collect the most water? |
90° 90% Rh |
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What can an LG are do that a conventional refrigerant cannot? |
34 GPP |
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True or false a refrigerant dehumidifier produces the lowest vapor pressure? |
False |
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Which dehumidifier would work best on a crawlspace that is open to cool outdoor air? |
A desiccant |
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The ICRC formula requires three things to determine the initial humidification needs: |
Cubic feet, Class, factor |
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Front (Term) |
L |
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What category of water requires carpet replacement? |
Cat 3 |
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Struck a negative pressurization can cause a Backdraft of what gas? |
Carbon monoxide |
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When the I CRC uses the term shell that means: |
Mandatory |
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When the I CRC uses the term should that means: |
Required |
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When the ICRC uses the term recommended that means: |
Suggested not mandatory |
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Where is the first place to check to see if drying? |
In front of air movers |
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What does our moisture map reveal? |
Source measurements equipment |
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The percentage or weight of moisture in materials as compared to an oven dried the sample is known as: |
Moisture content |
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What is fiber saturation point for most wood? |
30% |
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The difference in moisture content present in different areas of a single material is called? |
Gradient |
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Where is cupped board wettest? Top or bottom? |
Bottom |
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Wood will not support surface fungi below what percent? |
16% |
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Wood will not support surface fungi below what percent? |
16% |
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Structural wood must be dried to within what? |
2 to 4% of dry goal |
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When the use of a hammer probe on hardwood floor is necessary, where should we place the pens? Why? |
A dark ring, for easy repair |
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If a saturated piece of wood is 70°F, what vapor pressure exist when it? |
.75 |
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If the air above the saturated wood in the previous question is 75°F by 30% relative humidity what is the Delta vapor pressure? |
Vapor pressure at 70°F is .75 vapor pressure at 75° and 30% relative humidity is .27 .75-.27=.48 |
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Noninvasive meters can give false positive readings when placed on what? |
Metal or electrical |
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When you use a moisture meter on a non-wood material how should you interpret the readings? |
Comparative |
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How does your pen tachometer produce a reading? |
Resistance between pens |
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Explain how we can get missed leading readings from a Thermo hygrometer? |
Not clean cap on not acclimated not calibrated |
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What atmospheres do we want to measure in our daily environmental readings? |
Inside outside affected nonaffected HVAC equipment |
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What tool is used to check the dehumidifier performance and dehumidification capacity? |
Thermo hygrometer |
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How do you manipulate a vapor pressure differential? |
Temperature or dehumidification |
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Does the strength of VP differential ultimately dictate the force of drying? |
Yes |
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If the structural materials are cold what should you do? |
Increase heat |
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When is in place of drying an option? |
Cat one |
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Can you dry Jipson wall board on furring strips over and an insulated wall cavity on concrete blocks? |
Yes |
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Does the ICRC suggest that tinting a hardwood floor with hot, dry air can be single part of a drying strategy? |
No |
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How can you maximize liquid water extraction effectiveness? |
Thorough extraction |
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What are the two ways to remove water from a structure? |
Extraction and dehumidification |
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What is the best way to remove water from wet carpet and pad? |
Heavy extraction |
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What is the best way to remove water from wet carpet and pad? |
Heavy extraction |
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What concerns us most when extracting carpet and pad? |
Water left behind |
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How can we verify a good extraction of carpet and cushion? |
Disengage carpet and squeeze carpet cushion |
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How can we verify a good extraction of carpet and cushion? |
Disengage carpet and squeeze carpet cushion |
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Where should furniture be placed when employing and in place drain strategy? |
Middle of room |
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Carpet yarns, and weave, and cushion that most easily and is most difficult to release water during extraction |
The lightest |
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How are air movers installed when addressing walls using the ICRC concepts |
Every 55 |
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What is the usual procedure for baseboard with respect to in place drying? |
Leave |
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What drying problem can we find one metal studs are present? |
C-channels |
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What can we do when we are concerned about drying a contaminated wall cavity? |
Open wall cavity |
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What type of paint gives up moisture easily? |
Flat |
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What type of paint gives up moisture easily? |
Flat |
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What is the best way to determine if you have adequate dehumidification for your drying strategy? |
A decrease in moisture content |
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What type of paint gives up moisture easily? |
Flat |
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What is the best way to determine if you have adequate dehumidification for your drying strategy? |
A decrease in moisture content |
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To prevent condensation, the material temperatures must be warmer or cooler than the dewpoint temperature of the air? |
Warmer |
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Do you materials dry faster or slower when it’s temperature is warmer or cooler them to dewpoint? |
Dries faster and warmer |
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The amount of moisture in a volume of air, expressed as a percentage of the total moisture holding capacity of the air at a given temperature is called: |
Relative humidity |
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A pound of 70° dry air at sea level is approximately how many cubic feet? |
14 |
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When air can hold no more water vapor it is: |
Saturated |
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The pressure exerted by the molecules of a liquid on the surrounding surfaces is called: |
Vapor pressure |
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The most energy efficient dehumidifier in most situations is a? |
LGR |
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The most energy efficient dehumidifier in most situations is a? |
LGR |
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What type of dehumidifier can result in air pressure differential’s? |
Desiccant |
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The most energy efficient dehumidifier in most situations is a? |
LGR |
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What type of dehumidifier can result in air pressure differential’s? |
Desiccant |
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What two numbers are required to calculate dehumidifier moisture removal rates? |
CFM x GPD |
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The most energy efficient dehumidifier in most situations is a? |
LGR |
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What doesHEPA stand for? |
Hi efficiency particle air filter |
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HEPA Phil Traicion will provide a particular capture Efficiency of: |
99.97, .03 Micon |
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Should you seal the inlet of your air scrubber prior to turning it off? |
Yes |
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If you have a circuit rated at 20 apps, how many amps can you consistently run through it? |
16, no more than 80% |
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If the water has risen above the seal plate do we need to inspect the wall cavity? |
Yes |
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And I ICRC idea is: when water vapor passes through permeable material via VP differential, it is known as: |
Vapor diffusion |
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What to words describe the action of air and moisture entering and exiting a building through cracks and crevices? |
Infiltration and exfiltration |
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Explain the formula used to calculate electrical cost of an an electric appliance? |
Amps times volts times 24÷1000 times cost |
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Light gauge extension cord can cause what kind of safety risk? |
Fire |
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What is a BTU? |
British thermal unit |
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What type of dehumidifier can result in air pressure differential’s? |
Desiccant |
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How do you calculate the BTUs by product produced by running electrical equipment? |
Amps times volts times 3.4 |
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How many by product electrical BTUs are produced by asix amp/115 V dehumidifier? |
2346 |
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How many many BTU per hour are in a ton of cooling |
12,000 |
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Vapor retarding material has a permeance rating of: |
Less than one |
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When velocity is expressed in what fashion? |
FPM |
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My AFD’s are rated at 750 CFM, and I want five air changes per hour how many would I install in my 20,000 cubic |
CFM times 60/750×60 = 45,000 air changes times cubic square footage/5x20000=100000 divided by 45,000 equals 2.2 to the answer is three |
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How many cubic feet Kenny 750 CFM machine process per hour |
45,000 |
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How do you keep odors and other contamination in crawlspace from entering the house? |
Negative air |
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If you can smell but can’t see mold or some other order, what should you do? |
Call IEP |
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What does the thermal imaging camera see? |
Temperature differences |
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What two numbers are required to calculate dehumidifier moisture removal rates? |
CFM x GPD |
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A quick method of calculating a dehumidifiers moisture removal rate is expressed as pints per day assuming a pound of air is it 14 ft.³ is: |
CFM times grain depression |
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How do you calculate green depression? |
By measuring the air going into the D hue versus the air going out of the D hue |
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If the air entering the dehumidifier is 80°/45% and the air leaving is 102°/15% the green depression is |
25 |
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Sure the dehumidifier output be higher or lower GPP when it’s entering it? |
Lower |
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Should your re-activation error output be a higher or lower GPP then what’s entering it? |
Lower |
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Should the reactivation air be ducted outside the building when possible? |
Yes |
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If I am trying to produce the lowest GPP with my desiccant, should I feed it with the coldest air or the driest air? |
Driest air |
