For a pneumatic transmission system for instrumentation and control purposes, what is a common industry standard for pneumatic signal pressure range?

Correct Answer: Option C — 3 to 15 psig

The 3 to 15 psig range is the established industry standard for pneumatic instrumentation. The 3 psig floor provides a 'live zero,' allowing for the detection of system leaks or line breaks, while the 12 psig span provides sufficient resolution for accurate control of shipboard machinery and processes.