Water Damage Restoration Technician (WRT) Certification Practice Test

Which drying system would be appropriate for an environment with 40°F and 70% RH?

1. Closed

2. Open

3. Combination

4. None

The correct answer is: Combination

In a situation where the temperature is 40°F and the relative humidity is 70%, a combination drying system is particularly well-suited because it allows for both open and closed drying techniques, adapting to the specific conditions of the environment. A closed drying system involves sealing off the area to contain heat and moisture, which can be effective in warmer conditions with lower humidity. However, at 40°F and with higher relative humidity, a closed system may not be able to sufficiently reduce moisture levels in the air, as the external air can bring in more moisture than can be removed. An open drying system, which introduces outside air to reduce humidity, may also be less effective in this scenario. The outside air at 40°F and 70% RH could lead to inadequate evaporation since the air is already quite humid. The combination drying system takes advantage of both methods, allowing for controlled extraction of moisture while also keeping air circulation in mind. This system can optimize temperature and humidity levels within the space, facilitating more effective drying of materials. By using both strategies, one can maintain a balanced approach, ensuring that the drying process adapts to the specific challenges presented by the cold and humid environment.