// STCW · ETO ORAL EXAM · HIGH VOLTAGE
Built by a senior ETO who runs the boards on high-voltage container vessels — not a recycled test bank. Prep for the exact questions that fail people in the oral.
200 oral-style questions · STCW aligned · written by a working ETO
// THE ROOM
One examiner. One desk. Questions on the HV switchboard, PTW & LOTO, earthing and discharge — and no second chance for months if you freeze.
Pass rates on BST or first-aid courses sit near 100%. The ETO oral and high voltage endorsement are where careers actually stall. That’s the only place this site puts its effort.
// TWO TRACKS
200 oral-style questions across automation, PMS, alarm & monitoring, propulsion control and electrical distribution — phrased the way an examiner asks them, with model answers you can defend out loud.
Switchboard operation, breaker racking, permit-to-work, lock-out/tag-out, insulation testing, earthing and safe discharge — the procedures examiners probe because getting them wrong gets people killed.
// THE METHOD
Take the free quiz. It surfaces the gaps the oral will find — before the examiner does.
Work through 200 oral-style questions and the HV handbook, with answers you can explain, not just recognise.
Sit the oral able to reason through any board, any procedure — out loud, under pressure.
// WHO WROTE THIS
Every question and every page comes from 15+ years standing watch on high-voltage container vessels. The hard part of exam prep isn’t collecting questions — it’s knowing which answer survives a follow-up. That only comes from doing the job.
See the difference →// ⚡ SAMPLE · HIGH VOLTAGE
During HV switchboard isolation, you’ve racked out the breaker and proved it dead. Why must you still apply portable earths before touching the busbar?
Because “proved dead” only confirms the moment of testing. HV systems retain residual capacitive charge, and parallel circuits or long cable runs can carry induced voltage from nearby live conductors. Portable earths provide a permanent, visible discharge path and a guaranteed point of safety for anyone working on the busbar — the last line between a correct procedure and a fatality.
// WHO IT’S FOR
Engineers crossing over to the ETO certificate of competency
Officers preparing for the high voltage endorsement
Seafarers revalidating who haven’t touched a board in months
// QUESTIONS
Yes. The material maps to STCW competence for ETO and the high voltage requirements, written in current IMO terminology — CoC, revalidation, PTW, LOTO.
Because those pass at near 100%. The ETO oral and HV endorsement are where people actually fail, so that’s where the prep is concentrated. No padding.
No. They’re phrased oral-style, with model answers and the reasoning behind them — so you can defend an answer when the examiner pushes back.
Yes. Take it, see your gaps, decide for yourself. No card, no catch.
// READY
No card · instant access · GDPR-compliant
