NFPA-99 Practice Exam

The instrument air system must activate an alarm system when the dew point at system pressure exceeds what temperature in Fahrenheit?

1. -20 degrees

2. -22 degrees

3. -24 degrees

4. -26 degrees

The correct answer is: -22 degrees

The correct answer is based on safety and operational guidelines that are critical for maintaining the integrity of the instrument air system. When the dew point at the system pressure exceeds -22 degrees Fahrenheit, it indicates that there is an increased risk of moisture in the air. This moisture can lead to various issues, such as corrosion or freeze-up in pneumatic tools and systems, which could ultimately impact the functionality and safety of the equipment. Setting the alarm at this dew point threshold serves as a preventive measure, allowing for timely maintenance or corrective actions to be taken to ensure the air system remains dry and effective. By adhering to this standard, facilities can avoid operational disruptions and ensure a safer working environment. In contexts dealing with pneumatic systems, ensuring the dew point remains low is crucial for performance and safety, which is why this particular point of -22 degrees Fahrenheit is significant in alarm activation protocols.