How to clear your Chief Engineer's Oral Exam
Practical guidance on how to prepare for the Chief Engineer oral exam: how surveyors ask questions, what they expect in an answer, and common mistakes candidates make under pressure.
How to use these videos
The Chief Engineer (MEO Class I) oral at a Mercantile Marine Department (MMD) is a conversation with a surveyor, not a recitation. You are expected to show that you can manage a ship's machinery, crew and legal obligations when something goes wrong. These videos work through questions of the kind candidates report being asked, at the MMD offices in Mumbai, Kochi, Chennai and Kolkata.
A reliable way to build an answer, whatever the topic, is to move through the same steps in order:
- Make the situation safe for people, then the ship, then the cargo and the environment.
- Take the immediate technical action and say why, in plain words.
- Communicate: inform the bridge or Master, the watchkeepers and, where needed, the company.
- Find the cause and name what you would check, in a logical order.
- Record and report as the ISM Code and the rules require.
- Prevent a repeat through maintenance, training or a procedure change.
Watch a video, pause before the answer, and speak your own answer aloud first. Then compare. Practising out loud, ideally with another candidate or a senior, is what exposes gaps.
These videos are study aids prepared by this website. They are not official DG Shipping material. Syllabus, questions and procedures change, so always check current DG Shipping circulars and your examiner's instructions.
For the complete 651-question compendium with detailed written answers, message on WhatsApp: +91 7718065806
Exam technique and attitude
How to answer the question on Reverse Mentoring (Chief Engineer's question)
How a Chief Engineer should respond to questions about reverse mentoring, where junior crew share knowledge upward, and why examiners ask about it.
Generators, electrical and machinery emergencies
Two generators running in parallel, one loses excitation: action as Chief Engineer
A frequently asked MMD oral question: the actions a Chief Engineer must take when one of two generators running in parallel suddenly loses excitation, including load sharing and safety steps. (Upendra, Feb 2025)
Running generator frequency fluctuating: action as Chief Engineer
The correct emergency response when a running generator's frequency starts to fluctuate, a common scenario question in Chief Engineer orals.
Difference: two generators in parallel, one loses excitation and another has frequency fluctuation
The key differences between two similar-sounding oral exam scenarios, loss of excitation versus frequency fluctuation, and how the Chief Engineer's response differs for each.
Main engine and lubrication
ME vs RT-Flex engine: Chief Engineer oral exam answer
MAN B&W's ME electronically controlled engines compared with Wärtsilä's RT-Flex engines, covering the operational and design differences examiners expect a Chief Engineer to know.
How to answer: MAN B&W Alpha Lubricator system
How the MAN B&W Alpha cylinder lubrication system works, and which points examiners typically probe.
Fuels and emissions
Marine e-fuels explained
Alternative marine e-fuels such as e-methanol and e-ammonia, why shipping is adopting them, and how to discuss them confidently in an oral exam.
How to answer a question on alternative marine fuels as Chief Engineer
How to structure a strong answer on LNG, methanol, ammonia and hydrogen when an MMD surveyor asks about alternative fuels.
Demystifying methane slip and Tier III NOx compliance
Methane slip in LNG-fuelled engines and Tier III NOx compliance requirements, two increasingly common topics in modern orals.
Maritime law, insurance and management systems
The Himalaya Clause: the hidden shield
The Himalaya Clause, a provision that extends carrier liability protections to servants, agents and independent contractors, regularly asked in Chief Engineer orals.
How to explain the Inchmaree Clause
The Inchmaree Clause, a marine insurance provision covering losses from crew negligence or latent defects, and how to explain it in an oral exam.
UNCLOS Articles 91 and 94
What UNCLOS Article 91 (nationality of ships) and Article 94 (duties of the flag state) require, and why examiners test them.
How to explain IACS PR 17: reporting systems for ISM management failures
IACS Procedural Requirement PR 17, which governs how ISM management-system failures and non-conformities are reported, and how to explain it clearly to an examiner.
Safety, health, ballast and casualty case studies
How to handle a container fire as Chief Engineer
The steps a Chief Engineer should take if a container fire breaks out on board, a standard emergency-response question.
How the MSC Elsa 3 capsized, and why
The container ship that capsized and sank off the Kerala coast in May 2025 while carrying hazardous cargo, and the lessons for Chief Engineer candidates.
VLCC explosion and sinking
A Very Large Crude Carrier explosion and sinking, and the safety and operational lessons it holds for candidates.
Bulk carrier ballast tank capacity and its regulatory control
How ballast tank capacity on bulk carriers is regulated, and what examiners expect a Chief Engineer to know about ballast rules.
As a Chief Engineer, explain ship sanitation and disease vector control
Shipboard sanitation requirements and vector-control measures under maritime health regulations, and how to answer this topic.
About this website
The day alfidelfi.com was hijacked
How this website was hijacked and recovered: a cautionary account for anyone running a long-standing exam preparation site.
Keep preparing
For the 50-question practice quiz, the centre-wise oral question pages for Mumbai, Kochi, Chennai and Kolkata, and the written examination resources, return to the Marine Chief Engineer Oral & Written Examination page.