Indoor Air sciences CSMI Practice Exam

Which is not a micro-reservoir for mold?

1. Crawl space

2. Shower tile

3. Wall cavity

4. HVAC system

The correct answer is: Shower tile

The correct answer highlights that shower tiles do not serve as micro-reservoirs for mold in the same way that the other options do. Micro-reservoirs are typically locations that provide favorable conditions for mold to grow, which include moisture, organic material, and often limited airflow. Crawl spaces, wall cavities, and HVAC systems can all trap moisture, debris, and organic matter, making them prime environments for mold proliferation. A crawl space can accumulate water and humidity from the ground, while a wall cavity can harbor moisture from leaks, condensation, or humidity rising through the building materials. Similarly, HVAC systems can inadvertently foster mold growth if they accumulate dust and moisture, especially in ductwork and condensate pans. In contrast, while shower tiles can become slippery and may develop mold on their surface due to humidity and water exposure, they do not generally serve as a durable habitat for mold growth when compared to the micro-reservoirs found in the other examples. Regular cleaning and drying of shower tiles can effectively prevent mold formation, reducing the likelihood of them being considered a persistent micro-reservoir like the other options.