Technical Competence and Safety
Core concepts
Technical competence combines task-specific knowledge with a disciplined approach to hazard control. Candidates should understand the hierarchy of controls - elimination, substitution, engineering controls, administrative controls, and personal protective equipment - and why PPE is the last line of defence. You should be able to read a safety data sheet, apply lockout/tagout before servicing energized or pressurized equipment, and recognize confined-space and energized-work hazards. Field competence also includes verifying that instruments are within calibration, that test methods match the applicable standard, and that records are contemporaneous and traceable.
Traps to watch
Questions often reward the control highest in the hierarchy rather than the most familiar one; choosing a respirator where local exhaust ventilation would work is a typical wrong answer. Another trap is treating a "routine" task as exempt from lockout or from a permit - the requirement follows the hazard, not the frequency. Watch for questions that confuse a hazard assessment with a hazard control, or that suggest bypassing an interlock for convenience. Also be alert to competence traps: being asked to perform a test method you have not been trained on is a scope-of-practice issue, not a confidence test.
Worked example
Before servicing a pump, isolate and lock the energy sources, verify zero energy by attempting a start and testing for residual pressure, then perform the work. If a required control is unavailable, stop and escalate rather than substituting a lower-order control. Rule of thumb: if the control you chose would fail because a single person forgot something, it is probably an administrative control and should be backed by an engineering one where feasible.