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MLO EXAM > Water damage course 1-45 > Flashcards

Water damage course 1-45 Flashcards

1
Q

What is the most important aspect to the beginning of a job?

A

Hazard/Risk assessment

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2
Q

Employers must provide training, a fit test, and a medical evaluation for employees who will be utilizing what equipment?

A

Respirator

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3
Q

True or False.
Often found in older structures, lead and asbestos are hazardous materials regulated by the Federal government.

A

True

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4
Q

Secondary damage is more likely to occur when relative humidity levels are

A

68%

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5
Q

What steps should be taken when working in an area with potential contamination

A

Wear proper PPE, contain the area

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6
Q

On a project with mold growth or Cat 3 water, an assessment could be completed by

A

An Indoor Environmental Professional (IEP)

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7
Q

What is secondary damage?

A

Damage from water or humidity over time

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8
Q

Water that has significant degree of contamination and could cause illness is which of these?

A

Category 2

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9
Q

To disengage a carpet from a tack strip properly, reducing potential delamination, we would use a

A

Knee kicker and carpet awl

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10
Q

Which of the following would be considered Category 1 water?

A

From a Sanitary Source

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11
Q

Water that is grossly contaminated is

A

Category 3

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12
Q

When should carpet cushion always be disposed of?

A

When affected by Category 2 or 3 water

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13
Q

Classes of water describe

A

The potential rate of evaporation (evaporation load)

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14
Q

A drying chamber that has water bound in materials such as plaster or hardwood resulting in low potential evaporation is a

A

Class 4

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15
Q

A drying chamber that has the least amount of area affected porous materials (less than 5%) of the combined walls, floors and ceiling materials is a

A

Class 1

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16
Q

A drying chamber that has the greatest amount of moisture, affecting porous materials (over 40%) of the combined walls, floors and ceiling materials is a

A

Class 3

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17
Q

Wearing PPE, obtaining owner approval, and having occupant and pets out of the structure applies to which of the following:

A

Applying antimicrobials to the structure

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18
Q

Water extracted from a jobsite should be?

A

Disposed of according to local laws

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18
Q

Which of the following would reduce microorganisms to a level considered safe by public health standards? (lowest amount of microbial reduction)

A

Sanitizer

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18
Q

If client stops removal of contaminated materials (e.g., cushion/pad on Category 2; carpet or drywall on a Category 3 job), what should the restorer do?

A

Stop work to prevent liability

19
Q

Which of the following would eliminate microorganisms, and their spores?

A

Sterilizer

20
Q

How do you measure for gallons of water?

A

(Length) X (Width) X (Depth of water) X 7.48 = Gallons of water.

(You convert the inches to decimal by dividing by 12. Example: 1”9 = 9 divided by 12= .75. so it is 1.75)

21
Q

A moisture reading obtained from an unaffected material that allows the restorer to set drying goals for the affected structure

A

Dry standard

22
Q

When is a drying job done?

A

A moisture meter indicates we have met our dry goal

23
Q

Moisture sensors and IR Cameras are effective tools for

A

Quickly locating moisture in carpet

23
Q

Once an area is identified with an infrared camera as a suspect of being wet, that area
must be verified with

A

A moisture meter or sensor

23
Q

True or false? The moisture sensor can be used to verify our drying goal has been met

A

False

23
Q

How would you check for elevated moisture under a tile floor, a vinyl floor, or behind vinyl wallpaper?

A

Use non-invasive moisture meter

23
Q

Why do (IR) infrared cameras indicate possible moisture in materials?

A

Surfaces become cooler as water evaporates

24
Q

What does a
thermo-hygrometer measure?

A

Temperature and relative humidity

25
Q

How can a restorer document that drying goals were met?

A

Daily psychrometric and moisture readings

26
Q

The amount of moisture in the air, as a percentage of the maximum amount the air could hold at a given temperature is known as which of these?

A

Relative Humidity

26
Q

true or false.
Psychrometric conditions have a direct effect on the rate at which moisture moves within materials, as well as from wet materials.

A

True

27
Q

What is the ratio of the weight of water vapor mixed with one pound of dry air called?

A

Humidity Ratio

28
Q

To promote effective drying, restorers need to control

A

surface temperature, air temperature, vapor temperature.

28
Q

A surface with a temperature at or below dew point results in what?

A

Condensation

29
Q

Evaporation will increase when

A

Wet materials are made warmer

30
Q

At dew point temperature (100% Relative Humidity) what happens?

A

Vapor changes to liquid

31
Q

Providing dry airflow and increasing the temperature of wet materials (e.g. wood, wall cavities, carpet) the more energy is available for _____________ to occur.

A

Evaporation

32
Q

If a drying chamber is 75 degrees and 40% RH, what is the humidity ratio?

A

52 gpp

33
Q

What can happen when ducting airflow directly into walls, ceilings, or under cabinets?

A

More effective evaporation

34
Q

What conditions could result in Secondary damage?

A

A greater rate of evaporation than dehumidification

35
Q

A room has 847 square feet of wet floor and 329 square feet of wet walls/ceilings (wet walls below 2 feet have already been deducted). What range of air movers would be installed initially?

A

17 – 22

36
Q

Refrigerant dehumidifiers remove moisture in the air through

A

Condensation

37
Q

Since desiccant dehumidifiers do not remove water vapor through condensation, they are not limited by

A

Low Temperature

38
Q

who is in charge of antimicrobials ?

A

(USEPA) United States environmental protection agency

39
Q

what is the standard used for water damage?

A

ANSI/IICRC S500

40
Q

What is the type of material used for class 4?

A

vapor pressure diffuser

41
Q

AHAM refrigerants amount?

A

AHAM 80 F / 60% RH

MLO EXAM (5 decks)

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