Final answer:
On Piping and Instrumentation Diagrams (PIDs), a pneumatic valve should look similar due to the standardized symbols used in these diagrams.
Step-by-step explanation:
When referring to Piping and Instrumentation Diagrams (PIDs), a pneumatic valve should look similar across different sites. PIDs follow a standardized set of symbols to represent various elements like valves, sensors, and other equipment. The standardization ensures that professionals across different sites and industries can interpret the diagrams accurately, which contributes to safety, efficiency, and consistency in operations.