Tests requiring a pressure of 10 psig or less shall utilize a testing gauge having increments of what value or less?

• A. 0.05 psi
• B. 0.10 psi
• C. 0.25 psi
• D. 0.50 psi

Answer: (B)

The correct answer is based on the requirement for the sensitivity of testing gauges used for pressure tests at 10 psig or less. A testing gauge that has increments of 0.10 psi allows for precise measurements necessary to accurately assess the integrity of the gas systems being tested. Utilizing a gauge with this level of granularity ensures that even small fluctuations in pressure can be detected, which is critical in safety and performance assessments.

Using a gauge with larger increments, such as 0.25 psi or 0.50 psi, would not provide the sensitivity required for accurate readings at lower pressure levels, potentially overlooking minor leaks or issues. A 0.05 psi increment would be overly precise for most applications in this range, making it unnecessary and possibly impractical. Therefore, 0.10 psi strikes an appropriate balance between sensitivity and practicality for pressure testing in this context.