NFPA-99 Practice Exam

What is the standard gauge pressure for nitrogen gas service?

1. 15 - 30 psi.

2. 50 - 55 psi.

3. 162 - 185 psi.

4. It varies with system type.

The correct answer is: 50 - 55 psi.

The standard gauge pressure for nitrogen gas service is typically in the range of 50 to 55 psi. This range is established to ensure the effective delivery of nitrogen for applications such as medical gas systems, where consistent pressure is essential for safety and performance. Maintaining nitrogen at this pressure allows for proper operation of pneumatic devices and other equipment, minimizing the risk of pressure-related failures or hazards. While variations can occur based on specific system requirements or regulations, the 50 to 55 psi range is widely accepted as a standard for many medical and industrial applications. Other options may present different ranges that do not align with established practices for nitrogen service or suggest variability based on system types, which could lead to inconsistencies in application and safety. Understanding the correct pressure range is crucial for ensuring the integrity and safety of nitrogen systems in various settings.