Air Systems Cleaning Specialist (ASCS) Practice Exam

According to the NADCA Standard, how can an ASCS determine the required cleaning type for a coil assembly?

1. Access and inspect the upstream side of the coil

2. Access and inspect the plenum upstream and downstream of the coil

3. Access and inspect both upstream and downstream surfaces of the coil

4. Perform pilot tube testing upstream and downstream of the coil

The correct answer is: Access and inspect both upstream and downstream surfaces of the coil

To determine the required cleaning type for a coil assembly according to the NADCA Standard, it is essential to access and inspect both the upstream and downstream surfaces of the coil. This comprehensive approach allows the Air Systems Cleaning Specialist (ASCS) to evaluate the full condition of the coil, including any debris or contaminants that may have accumulated on either side. By inspecting both surfaces, the ASCS can identify not only issues related to airflow and efficiency but also potential sources of mold or microbial growth that could affect indoor air quality. Such thorough inspection leads to a more informed decision on the cleaning method required, ensuring that all aspects of contamination are properly addressed. While accessing and inspecting just the upstream side or only the plenum upstream and downstream may provide some information, these methods do not offer a complete picture of the coil's condition. Similarly, pilot tube testing alone gives limited insights related to airflow but does not directly assess physical contamination, which is critical in determining cleaning needs. Thus, inspecting both surfaces effectively supports the goal of maintaining a clean and healthy air system.