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.
In the post image, which symbol from ISA-5.1-2009 – Instrumentation Symbols and Identification is used to indicate a temperature regulator?
Click Here to Reveal the Answer
Answer B is incorrect because the symbol represents a back pressure regulator, external pressure tap.
Answer C is incorrect because the symbol represents a pressure reducing regulator, external pressure tap.
Answer D is incorrect because the symbol does not exist in ISA-5.1-2009.
The correct answer is A; this symbol reflects a temperature regulator, filled thermal system.
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