Gas Turbine Systems Technician – Mechanical (GSM) A School Test 1 Practice 2026 - Free GSM Technician Practice Questions and Study Guide

Chip detectors are designed to sense metal wear debris in lubricating oil. Ferrous particles are iron-containing and are magnetic, so they get captured by the detector and trigger a warning when such debris is present. That direct link makes ferrous metal particles in oil the telltale sign the detector is looking for. The other symptoms don’t specifically indicate iron-based debris: oil color change can result from oxidation or contamination, low oil viscosity points to lubrication film issues, and high ambient temperature affects oil properties but not the presence of metal particles.