Entry-level competency exams typically cover five areas: (1) Safety — LOTO, GWO standards, PPE, working at height procedures; (2) Electrical — AC/DC theory, three-phase power, transformer basics, power factor; (3) Mechanical — gearboxes, main shafts, yaw and pitch systems, hydraulics; (4) Troubleshooting — reading SCADA alarms, root cause analysis, using technical manuals; (5) Tools and instruments — multimeters, torque wrenches, vibration analysis basics. BlitzGrok practice questions cover all five domains.