Which standards have the higher accuracy requirements for pressure gauges?

The choice identifying USACE and ASTM E3158 reflects the correct understanding of the accuracy requirements for pressure gauges in the context of whole-building airtightness testing.

USACE (United States Army Corps of Engineers) standards are often implemented in military and governmental construction projects where precision is crucial for ensuring energy efficiency, life-cycle cost reductions, and quality control. The high stakes of these applications necessitate stringent accuracy requirements for pressure gauges to ensure reliable test results that can influence design and operational strategies.

ASTM E3158 is specifically relevant in this context as it outlines guidelines for testing and requires a higher standard of accuracy for measurement instruments, including pressure gauges. This ensures that results are dependable and allow for precise assessments of building airtightness.

The other options may reference relevant standards, but they either do not focus as strictly on accuracy or might address different aspects of testing that do not prioritize gauge precision to the same extent as the standards chosen. For example, ASTM E779 and ISO 9972 are significant in the subject area but do not emphasize gauge accuracy as profoundly as the USACE and E3158 do. Therefore, the unique combination of reliability and precision reflected in the USACE and E3158 standards makes this choice stand out in terms of accuracy requirements for