Water Damage Restoration Technician (WRT) Certification Practice Test

What surface temperature risk condensation when air is at 80°F and 60% RH?

1. 50°F

2. 60°F

3. 70°F

4. About 65°F

The correct answer is: About 65°F

To determine the surface temperature at which condensation occurs given an air temperature of 80°F and a relative humidity of 60%, it's important to understand the concept of dew point. The dew point is the temperature at which air becomes saturated with moisture and begins to condense into water droplets. At 80°F with 60% relative humidity, the dew point can be calculated or approximated to find out at what surface temperature condensation will start occurring. Typically, the dew point for 80°F at 60% RH is around 65°F. If a surface temperature falls below the dew point, condensation will form on that surface because the air in contact with it cannot hold all the moisture present, leading to the vapor turning into liquid. Thus, a surface temperature of about 65°F is the critical point where condensation risk begins when the surrounding air maintains the specified temperature and humidity. This information is crucial in restoration scenarios, as it guides the technician in managing humidity levels and determining suitable conditions to prevent water damage and mold growth.