What is the minimum frequency to measure and record the air flow rate at the intake airway on the return side of seals over which intake air passes?

• A. Daily
• B. Every shift
• C. Once a month
• D. Weekly

Answer: (C)

The key idea is how often the ventilation system needs routine monitoring at a specific, critical point: the intake airway on the return side of seals where intake air passes. The minimum frequency for measuring and recording the air flow there is once a month. This cadence strikes a balance between catching gradual changes in airflow due to seal movements, leakage, or operational shifts, and not overburdening crews with daily checks. Monthly measurements provide enough trend data to identify declines or anomalies over time, allowing timely actions if the flow falls outside acceptable ranges. More frequent checks (daily or weekly) would be appropriate for high-risk or commissioning situations, but for routine monitoring at this location, monthly is the required minimum.