Today’s 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 information about the CCST program. This question comes from the Level I study guide, Domain 3, Troubleshooting. Level I represents a professional who has a five-year total of education, training, and/or experience.
If a control valve will pass 25% of its full capacity when it is 25% open, 50% of its capacity when 50% open, and 75% when 75% open, the inherent characteristic is:
a) quick opening
b) equal percentage
e) none of the above