NEW 5th edition. For those about to sit their formal oral session with the MCA for the Electro Technical Officer Certificate of Competence (CoC). A set of questions and answers that will allow you to practice and exercise your knowledge prior to your interview. Written by the former ETO senior lecturer from the Warsash Maritime Academy. Additional questions and answers. Input from recent successful students. A must for all budding ETO's. Practice reading the questions, writing and speaking your answers then look up the preferred answer. Repeat many times until your interview.