Area alarms may monitor which of the following in addition to the other measurements?

• A. High pressure in gas lines
• B. Low vacuum in vacuum lines
• C. All of the above
• D. None of the above

Answer: (C)

Area alarms are designed to catch safety faults across an area by monitoring multiple parameters beyond the basic room conditions. They will alert if the gas lines experience high pressure, which can indicate regulator failure, downstream blockages, or accidental over-pressurization, all of which pose a risk of leaks or delivery errors. They also monitor vacuum or suction lines for low vacuum, signaling problems such as leaks, valve mispositioning, or pump failure that could compromise suction or negative-pressure environments. Because an area alarm is intended to detect these fault conditions as part of comprehensive safety monitoring, both high pressure in gas lines and low vacuum in vacuum lines are within its scope. Therefore, all of the above is the best choice.