Low air pressure alarms, if provided, shall be tested at what interval in accordance with the manufacturer's instructions?

• A. Monthly
• B. Quarterly
• C. Semiannually
• D. Annually

Answer: (B)

Low air pressure alarms are safety-critical indicators that must be verified on a regular schedule to ensure they will alert you when air pressure drops below the set point. The manufacturer specifies how often this testing should occur, and the common, practical interval is every three months. Testing quarterly helps detect any degradation or failure in the alarm, ensuring timely alerts without imposing excessive maintenance requirements. Testing more frequently (monthly) isn’t usually required unless the manufacturer directs it or the system is in a high-risk condition, while longer intervals (semiannually or annually) increase the chance of an undetected alarm failure. When testing, you verify that the alarm activates at the correct pressure, that the audible/visual indicators function, and that any related supervisory circuits respond as designed.