IICRC ASD EXAM WITH 270 QUESTIONS & ANSWERS
2024 ( A+ GRADED 100% VERIFIED)
1. Category 1: Clean
Originates from a sanitary water source
2. Category 2: Gray
Contaminated; potentially causes discomfort or sickness
3. Category 3: Black
Grossly contaminated; includes toxins, pathogens
4. Regulated or Hazardous Materials and Mold: IEP recommended
5. Class 1: (least amount of water, absorption and evaporation) wet less than ~5% of
combined floor, wall, and ceiling surface area -minimal moisture absorption into the
materials
6. Class 2: (large amount of water, absorption and evaporation) wet between ~5 -
~40%of combined floor, wall, and ceiling surface area -minimal moisture absorption
into the materials
7. Class 3: (greatest amount of water, absorption and evaporation) wet more than ~40%
of combined floor, wall, and ceiling surface area -minimal absorption into the
materials
8. Class 4: Area -minimal absorption into the materials Class 4-(deeply held or bound
water)-(e.g., hardwood; lath and plaster; concrete) -water hidden, trapped, or bound
in low evaporation assemblies; requires controlled drying techniques, low vapor
pressure, specialty equipment probable
9. Principles of Drying: Remove excess Evaporation Dehumidification (ventilation)
Temperature control
10. Light Wand: Perimeter of water loss; extract glue-down carpets; follow-up
extraction-stationary too
11. Stationary Wand: Water claw; Flash Xtractor) -subsurface tool; extract
carpet/cushion together
12. Self-propelled wand: Rover; Xtreme Xtractor) -self-propelled riding tool; multi-
speed; extract carpet and cushion
13. Squeegee wand: Concrete; hardwood; vinyl; laminate
14. Submersible Pumps: Formula -(ft2 x inches deep) ÷ 12" = ft3 water x 7.48= water
volume
15. Centrifugal: Laminar
16. Axial: High-amperage; low-amperage; focus ability
, .
17. Air Mover Calculations: Initially one airmovereach affected room Additionally,
add one:
Every 50-70 sq. ft. wet floor and walls up to 24 inches high
Every 100-150 sq. ft. of affected wet ceiling and walls over 24 inches high Each
wall offset greater than 18 inches
One per 14 LF of all only (if ony lower wall and limited flooring)
One per small areas under 25 sq ft. if upper walls and ceilings not affected
18. SCDS Vent Ducted: Turbovents 18"-48" widths; Octi-dry; AirWolf
19. SCDS Injected: Injectidry; Dri-Force; Omni-dry; Direct-it In
20. FDS Vented: Air Wolf
21. FDS Injected: negative air mats/panels
Dri-Force; Injectidry
22. AFD: negative air machines-NAM; air scrubbers; HEPA filters
23. Conventional Dehumidifier: RH 40% 55 GPP
24. LGR: 30% RH 34 GPP
25. Desiccant: 10% RH 10-15 GPP
26. AHAM Rating: Pints removed at 80º F / 60% RH in 24 hours
27. Refrigerants: Most efficient operating conditions 70º -90º F.
28. Desiccants: Most efficient with incoming air from coolest/driest air possible;
capable of creating greatest pressure differentials (air and vapor pressures); produces
low humidity ratio (gpp) important to dry Class 4 materials, dense materials, and
complex systems.
29. Dehumidifier uses: closed-drying environments; multiple layers of materials;
security limitations; high outside (and inside) humidity conditions; no ventilation
ports; basement areas
30. Conventional Class 1: 100
31. Conventional Class 2: 40
32. Conventional Class 3: 30
33. Conventional Class 4: N/A
34. LGR Class 1: 100
35. LGR Class 2: 50 36. LGR Class 3: 40
37. LGR Class 4: 40
38. Desiccant Class 1: 1 ACH
39. Desiccant Class 2: 2 ACH
40. Desiccant Class 3: 3 ACH
, .
41. Desiccant Class 4: 3 ACH
42. Amperes: the amount of electricity (current) flowing in a circuit
43. Voltage: The force of electricity flow in a circuit
44. Watts: the amount of electricity an electrical device uses when operating
45. British Thermal Units: heat generated by electrical device
46. BTU Formula: amps x volts x 3.4 = BTU per hour
47. HVAC: cooling ability to remove 12,000 Btu per ton per hour
48. Residential Electric: 15 amp
49 Commercial Electric: 20 amp
50. Power Splitters: when there is limited amperage or fuses(typically, 30 amp-dryer/50
amp-range
51. Light weight extension cords: shock/fire hazards
52. Power Consumption Formula $: volts x amps x 24 hours = watts ÷ 1000 = kW x
cost per kW@day
53. Moisture Sensor: senses moisture in materials over 17% MC; helps determine
perimeter of water damage; unable to determine which layer is wet or when dry
54. Thermo-hygrometer: determines temperature / RH in all required atmospheric
areas of inspection; helps determine open or closed drying system; further
determines dehumidifier recommendations after initial placement
55. Moisture Meters: invasive and non-invasive; determines moisture content;
establish, monitor and determine when dry standards are met
56. Miscellaneous Meters: infrared camera and thermometer; manometer; borescope;
data logger
57. HEPA: High Efficiency Particulate Air (99.97% capture rate of particulates at .3
micron size)
58. EPA: Environmental Protection Agency (U.S. federal agency with regulatory
control over biocides)
59. FIFRA: Federal Insecticide, Fungicide and Rodenticide Act -U.S. federal
regulations administered by EPA 60. Disinfectants:
61. Sanitizers:
62. Sterilizers:
63. Carpet installation methods: stretch-in, direct glue-down, double glue-down
64. Carpet drying methods: in-place, full float, partial float
2024 ( A+ GRADED 100% VERIFIED)
1. Category 1: Clean
Originates from a sanitary water source
2. Category 2: Gray
Contaminated; potentially causes discomfort or sickness
3. Category 3: Black
Grossly contaminated; includes toxins, pathogens
4. Regulated or Hazardous Materials and Mold: IEP recommended
5. Class 1: (least amount of water, absorption and evaporation) wet less than ~5% of
combined floor, wall, and ceiling surface area -minimal moisture absorption into the
materials
6. Class 2: (large amount of water, absorption and evaporation) wet between ~5 -
~40%of combined floor, wall, and ceiling surface area -minimal moisture absorption
into the materials
7. Class 3: (greatest amount of water, absorption and evaporation) wet more than ~40%
of combined floor, wall, and ceiling surface area -minimal absorption into the
materials
8. Class 4: Area -minimal absorption into the materials Class 4-(deeply held or bound
water)-(e.g., hardwood; lath and plaster; concrete) -water hidden, trapped, or bound
in low evaporation assemblies; requires controlled drying techniques, low vapor
pressure, specialty equipment probable
9. Principles of Drying: Remove excess Evaporation Dehumidification (ventilation)
Temperature control
10. Light Wand: Perimeter of water loss; extract glue-down carpets; follow-up
extraction-stationary too
11. Stationary Wand: Water claw; Flash Xtractor) -subsurface tool; extract
carpet/cushion together
12. Self-propelled wand: Rover; Xtreme Xtractor) -self-propelled riding tool; multi-
speed; extract carpet and cushion
13. Squeegee wand: Concrete; hardwood; vinyl; laminate
14. Submersible Pumps: Formula -(ft2 x inches deep) ÷ 12" = ft3 water x 7.48= water
volume
15. Centrifugal: Laminar
16. Axial: High-amperage; low-amperage; focus ability
, .
17. Air Mover Calculations: Initially one airmovereach affected room Additionally,
add one:
Every 50-70 sq. ft. wet floor and walls up to 24 inches high
Every 100-150 sq. ft. of affected wet ceiling and walls over 24 inches high Each
wall offset greater than 18 inches
One per 14 LF of all only (if ony lower wall and limited flooring)
One per small areas under 25 sq ft. if upper walls and ceilings not affected
18. SCDS Vent Ducted: Turbovents 18"-48" widths; Octi-dry; AirWolf
19. SCDS Injected: Injectidry; Dri-Force; Omni-dry; Direct-it In
20. FDS Vented: Air Wolf
21. FDS Injected: negative air mats/panels
Dri-Force; Injectidry
22. AFD: negative air machines-NAM; air scrubbers; HEPA filters
23. Conventional Dehumidifier: RH 40% 55 GPP
24. LGR: 30% RH 34 GPP
25. Desiccant: 10% RH 10-15 GPP
26. AHAM Rating: Pints removed at 80º F / 60% RH in 24 hours
27. Refrigerants: Most efficient operating conditions 70º -90º F.
28. Desiccants: Most efficient with incoming air from coolest/driest air possible;
capable of creating greatest pressure differentials (air and vapor pressures); produces
low humidity ratio (gpp) important to dry Class 4 materials, dense materials, and
complex systems.
29. Dehumidifier uses: closed-drying environments; multiple layers of materials;
security limitations; high outside (and inside) humidity conditions; no ventilation
ports; basement areas
30. Conventional Class 1: 100
31. Conventional Class 2: 40
32. Conventional Class 3: 30
33. Conventional Class 4: N/A
34. LGR Class 1: 100
35. LGR Class 2: 50 36. LGR Class 3: 40
37. LGR Class 4: 40
38. Desiccant Class 1: 1 ACH
39. Desiccant Class 2: 2 ACH
40. Desiccant Class 3: 3 ACH
, .
41. Desiccant Class 4: 3 ACH
42. Amperes: the amount of electricity (current) flowing in a circuit
43. Voltage: The force of electricity flow in a circuit
44. Watts: the amount of electricity an electrical device uses when operating
45. British Thermal Units: heat generated by electrical device
46. BTU Formula: amps x volts x 3.4 = BTU per hour
47. HVAC: cooling ability to remove 12,000 Btu per ton per hour
48. Residential Electric: 15 amp
49 Commercial Electric: 20 amp
50. Power Splitters: when there is limited amperage or fuses(typically, 30 amp-dryer/50
amp-range
51. Light weight extension cords: shock/fire hazards
52. Power Consumption Formula $: volts x amps x 24 hours = watts ÷ 1000 = kW x
cost per kW@day
53. Moisture Sensor: senses moisture in materials over 17% MC; helps determine
perimeter of water damage; unable to determine which layer is wet or when dry
54. Thermo-hygrometer: determines temperature / RH in all required atmospheric
areas of inspection; helps determine open or closed drying system; further
determines dehumidifier recommendations after initial placement
55. Moisture Meters: invasive and non-invasive; determines moisture content;
establish, monitor and determine when dry standards are met
56. Miscellaneous Meters: infrared camera and thermometer; manometer; borescope;
data logger
57. HEPA: High Efficiency Particulate Air (99.97% capture rate of particulates at .3
micron size)
58. EPA: Environmental Protection Agency (U.S. federal agency with regulatory
control over biocides)
59. FIFRA: Federal Insecticide, Fungicide and Rodenticide Act -U.S. federal
regulations administered by EPA 60. Disinfectants:
61. Sanitizers:
62. Sterilizers:
63. Carpet installation methods: stretch-in, direct glue-down, double glue-down
64. Carpet drying methods: in-place, full float, partial float
