In pneumatic control systems, control equipment must be listed for what?

• A. The brand of devices
• B. The color coding of lines
• C. The number and type of actuating devices utilized, and compatibility shall be listed
• D. The warranty period

Answer: (C)

In a pneumatic control system, the equipment that initiates and coordinates the release must be evaluated for how it interfaces with the actuating devices it drives. Being listed for the number and type of actuating devices utilized, and having compatibility listed, means that the control equipment has been reviewed to work with the exact count and kinds of actuators in the system and to operate correctly with them. This ensures reliable sequencing and proper actuation when the system is commanded, and it shows that the components will physically and functionally work together as designed.

Other factors like the brand of devices, color coding of lines, or warranty period don’t address that interface and performance assurance.