AutoQuiz is edited by Joel Don, ISA's social media community manager.

This automation industry quiz question comes from the ISA Certified Control Systems Technician (CCST) program. Certified Control System Technicians calibrate, document, troubleshoot, and repair/replace instrumentation for systems that measure and control level, temperature, pressure, flow, and other process variables. Click this link for more information about the CCST program.

Which of the following parts of a globe valve serve the same purpose as the disk in a butterfly valve?

A) Seat
B) Plug
C) Packing rings
D) Packing flange
E) None of the above

In a butterfly valve, it is the disc that is the moving part that regulates flow volume and comes in contact with a stationary structure, the body, to terminate flow.

In the globe valve, the plug's movement performs these same functions.

The other three choices are legitimate valve parts.

The answer is B.

About the Editor
Joel Don is the community manager for ISA and is an independent content marketing, social media and public relations consultant. Prior to his work in marketing and PR, Joel served as an editor for regional newspapers and national magazines throughout the U.S. He earned a master's degree from the Medill School at Northwestern University with a focus on science, engineering and biomedical marketing communications, and a bachelor of science degree from UC San Diego.

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