ASD Practice Tests Questions With Complete Solutions
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Course
ASD
Institution
ASD
Category 1 - Category of Water that originates from sanitary water source (Clean)
Catetroy 2 - Category of Water that is contaminated; may cause discomfort or sickness (Grey)
Category 3 - Category of Water that is grossly contaminated; includes toxins, pathogens
Special Situation - Regulat...
1 per 10-16 linear ft. of wall area; 15-45 degree focus; almost
touching wall. - Placement of Airmovers
Structural Cavity Drying Systems - (SCDS)
vented (turbovents 18" - 48" widths' Octidry; Air Wolf
injected (Injectidry; Dri-Force; Direct-it In)
Floor Drying System - vented (Air Wolf)
Injected - negative air mats (Dri-Force; Injectidry)
Air Filtration Devices - AFDs (negative air machines; air
scrubbers; HEPA filters)
AHAM Rating - On dehumidification equipment it is the pints
removed at 80 degrees and 60% humidity in 24 hours.
,Standard Refrigerant - Temperature - 68 degress
Relative Humidity - 60%
Specific Humidity (gpp) - 55-60
Conventional - Temperature - 33 degrees
Relative Humidity - 40%
Specific Humidity (gpp) - 55-60
Low Grain Refrigerant (LGR) - Temperature - 40 degrees
Relative Humidity - 30%
Specific Humidity (gpp) - 28-35
Desiccant - Temperature - 32 degrees
Relative Humidity - 10% - below
Specific Humidity (gpp) - 10-15 - below
Refrigerants - Dehumidifiers that are most efficient operating
conditions 70-90 degrees (most energy efficient)
Desiccants - Dehumidifiers that are most efficient with incoming
air from coolest/driest air possible; capable of creating pressure
differentials; produces low specific humidity required to dry
Class 4 materials.
Conventional - Initial Dehumidification Calculations
Class 1 = 100
Class 2 = 40
Class 3 = 30
Class 4 = N/A
, LGR - Initial Dehumidification Calculations
Class 1 = 100
Class 2 = 50
Class 3 = 40
Class 4 = 50
Desiccant - Initial Dehumidification Calculations
Class 1 = 1 ACH
Class 2 = 2 ACH
Class 3 = 3 ACH
Class 4 = 2 ACH
Amperes (amperage or amps) - The amount of electricity
(current) flowing in a circuit
Voltage - The force of electricity flow in a circuit
Watts - The amount of electricity an electrical devices uses
when operating
BTUs (British Thermal Units) - Heat generated by electrical
device.
amps x volts x 3.4 - BTUs per hour formula
12,000 - HVAC removes _________ BTUs per ton.
15 - Residental is generally ___ amp
20 - Commerical is generally ___ amp
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