RIA Psychrometrics & Structural Drying Principles

Question 1

What does psychrometrics refer to in the context of restoration?

Accepted Answer

The science of measuring and controlling air-moisture properties

Answer

The study of water pressure in pipe systems

Answer

The process of extracting standing water from a structure

Answer

The chemical treatment of contaminated building materials

Question 2

How is relative humidity (RH) best defined?

Accepted Answer

The ratio of actual water vapor in air to the maximum possible at that temperature, expressed as a percentage

Answer

The total weight of water vapor contained in one cubic foot of air

Answer

The temperature at which air reaches full saturation

Answer

The amount of moisture a structural material can absorb before saturation

Question 3

What is the dew point temperature?

Accepted Answer

The temperature at which air becomes saturated and condensation begins to form

Answer

The minimum safe operating temperature for a refrigerant dehumidifier

Answer

The moisture content of a wood subfloor when it reaches equilibrium

Answer

The relative humidity level at which mold growth becomes likely

Question 4

In psychrometrics, what is a 'grain' of moisture?

Accepted Answer

A standard unit of moisture equal to 1/7,000 of a pound

Answer

A unit used to measure air pressure differentials

Answer

The visible mineral deposit left behind by evaporating water

Answer

The smallest detectable increment of relative humidity change

Question 5

What does the abbreviation GPP stand for in structural drying?

Accepted Answer

Grains Per Pound of dry air

Answer

General Psychrometric Parameters

Answer

Gallons Per Process

Answer

Ground Pressure Protocol

Question 6

How is wet bulb temperature measured?

Accepted Answer

By reading a thermometer whose bulb is wrapped in a moistened wick exposed to moving air

Answer

By placing a thermometer directly on the surface of standing water

Answer

By measuring the surface temperature of wet building materials

Answer

By reading the temperature inside a dehumidifier's evaporator coil

Question 7

Which standard provides the primary psychrometric and structural drying guidance used by restoration professionals?

Accepted Answer

IICRC S500 Standard for Professional Water Damage Restoration

Answer

NFPA 70 (National Electrical Code)

Answer

EPA 402-K-02-003 Mold Remediation in Schools and Commercial Buildings

Answer

OSHA 1910.134 Respiratory Protection Standard