Air Systems Cleaning Specialist (ASCS) Practice Exam

Which of the following is a common sign of inadequate HVAC system maintenance?

1. Consistent temperature control

2. Unexpected utility spikes

3. Low humidity levels

4. Optimal air circulation

The correct answer is: Unexpected utility spikes

Unexpected utility spikes serve as a strong indicator of inadequate HVAC system maintenance. When an HVAC system is not well-maintained, it may struggle to operate efficiently. This inefficiency can occur due to various reasons, such as clogged air filters, dirty coils, or malfunctioning components, which require the system to work harder to achieve the desired temperature. As a result, the increased energy consumption leads to higher utility bills, manifesting as unexpected spikes in energy costs. In contrast, other options indicate either a well-functioning system or do not specifically point to maintenance issues. For example, consistent temperature control suggests that the HVAC system is operating efficiently, while optimal air circulation indicates good airflow and overall effective function. Low humidity levels may not necessarily indicate a maintenance problem either; they can be a result of the system’s design and intended function in certain environments.