Real high-voltage questions from the ETO oral exam, each with the pass-level model answer and the reasoning to defend it — safe isolation, proving dead, earthing, arc flash and more. Written by a working Senior ETO.
Asked about alternator protections and reverse power in the oral? The exact pass-level answer, the reasoning to survive the follow-up, and the mistakes that fail candidates.
Asked to explain a star-delta starter in the oral? The exact pass-level answer, the reasoning to survive the follow-up, and the mistakes that fail candidates — from a working Senior ETO.
High Voltage safety on ships explained for the ETO oral exam: the safety mindset, permit to work, isolation and earthing, insulation testing and arc flash — what the examiner actually wants to hear.
Practical advice from a Senior ETO on passing the ETO CoC oral exam: what examiners really test, the golden rule for answering, the mistakes that fail candidates, and how to prepare.
Ten high-voltage questions that regularly come up in the ETO CoC oral exam — each with a model answer explained by a Senior ETO. Practice the way the examiner actually asks.
Entry-level seafarer salary 2026 — what a cadet, ordinary/able seaman (OS/AB) and junior officer really earn at the start, how to climb the rank ladder, and the moves that raise your pay fastest.
A working Senior ETO explains how to become a marine Electro-Technical Officer — the real route, requirements, High Voltage, sea time, and how to pass first time.
Insulation resistance testing on ships explained beyond the spot megohm value: capacitive, absorption and leakage current, PI, DAR, temperature and trend.
How to pass the ETO oral exam, from a Senior ETO: what examiners want, the safe-isolation drill, practising out loud, and a final two-week plan.