June 2009

ISA Certified Control Systems Technician (CCST) program

Certified Control System Technicians (CCSTs) calibrate, document, troubleshoot, and repair/replace instrumentation for systems that measure and control level, temperature, pressure, flow, and other process variables.

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.

CCST question

The line symbol from ISA-5.1-1984 (revised 1992)

identifies a/an:

A. Mechanical link

B. Electrical signal

C. Pneumatic signal

D. Hydraulic signal

CCST answer

The correct answer is C, a pneumatic signal.

Here are the symbols for answers A, B, C, and D.