2G051 Volume 2 URE Practice Exam 2026 - Free 2G051 URE Practice Questions and Study Guide

Verification of zero energy means confirming that every energy source for the equipment has been isolated and that any stored or residual energy is dissipated or blocked before work begins. This ensures there is no way the machine could energize or release stored energy while maintenance is performed. In practice, you lock out and tag the energy sources, then verify by attempting to operate the controls in the off position or by using appropriate testing equipment to confirm the absence of motion or energy. This covers electrical, hydraulic, pneumatic, mechanical, and any stored energy like springs, capacitors, or gravity. The other options either re-energize the system, rely only on a visual check, or consider only the main power switch, which can miss other energy sources and stored energy.