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.
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.
Insulation resistance testing on ships explained beyond the spot megohm value: capacitive, absorption and leakage current, PI, DAR, temperature and trend.
Common marine high voltage interview and oral questions with model answers, explained by a Senior ETO — safety, switchgear, earthing and protection.
A Senior ETO breaks down the ETO oral exam questions candidates fail on — especially high voltage — with sample questions, model answers and a free practice set.