MAJ EOOW Engineer Exam common mistakes
MAJ EOOW Engineer Exam · Understand the traps and how to avoid them.
When a regulation question asks about discharge or record-keeping requirements, the candidate answers from memory of general good practice ("nothing oily overboard") instead of naming the specific MARPOL Annex, the applicable discharge limit, and the required Oil Record Book entry, so the answer is directionally right but scores no marks on the criteria that are actually assessed.
MARPOL requirements are taught in training as principles and slogans, and candidates rarely rehearse the numeric limits (for example 15 ppm for machinery-space bilge water under Annex I, the 15 ppm alarm and automatic stopping device requirement) or the exact wording of the entries alongside the operational procedure. Under time pressure the candidate writes the operational story and skips the compliance detail.
What to do instead
Build a one-page table per Annex: substance covered, discharge standard, equipment required, record book and entry code, and special-area rules. Before the exam, practise writing out a full Oil Record Book entry for a bilge transfer and for sludge incineration from blank paper. In any answer, structure it as: Annex, limit, equipment, record, exception.
On watchkeeping and handover questions the candidate describes a watch as a continuous activity and omits the formal handover and the conditions under which a watch must not be taken over or must be handed over early, and cannot state the Master-notification triggers for machinery defects.
Candidates study watchkeeping as a narrative of rounds and log entries rather than as a set of decision points. The STCW and company requirements about fitness, fatigue, and the duty to inform the Chief Engineer and Master of defects that could endanger the ship are learned as background, not as examinable rules, so they are not retrieved when a scenario question asks what to do next.
What to do instead
Learn the watchkeeping content as checklists: takeover checklist (fitness, fatigue, machinery state, ongoing jobs, permits, alarms, standing orders), handover checklist, and a list of defects requiring immediate Chief Engineer and Master notification. Rehearse scenario answers in the form: immediate action, notification, record, follow-up.
When asked to explain a machinery malfunction, the candidate jumps to a single favourite cause (usually dirty fuel or a faulty sensor) and stops, without a structured fault-finding sequence, without stating what evidence would confirm or exclude each cause, and without saying what immediate action protects the plant.
Fault diagnosis is learned on the job by pattern recognition, so candidates answer with the last similar case they saw. Exam questions reward a systematic approach: symptoms, possible causes ranked, tests to discriminate, immediate safe action, and corrective action. Candidates have not practised producing that structure in writing.
What to do instead
Use a fixed template for every fault question: observed symptoms, immediate action to make the plant safe, list of causes grouped by subsystem (fuel, air, cooling, lubrication, control, mechanical), a discriminating test for each, then repair and verification. Practise on the classic cases: high exhaust temperature, loss of lube oil pressure, scavenge fire, boiler low water level, steering gear hydraulic leak.
The candidate treats auxiliary systems as simple and gives a shallow answer: for example, describing boiler water treatment as "add chemicals" without naming the tests (alkalinity, chloride, phosphate, dissolved oxygen), the limits, or the consequences of carryover; or describing a steering gear test without the SOLAS requirement to test before departure and record it.
Auxiliary machinery is perceived as lower-status than the main engine, so revision time is concentrated on propulsion. The specific numeric limits and statutory test requirements for boilers, steering gear, and compressors are therefore thin, and the candidate cannot produce them on demand.
What to do instead
Make a specifications sheet for each auxiliary system with the numbers an examiner can ask for: boiler water test parameters and typical limits, safety valve accumulation test, steering gear emergency drill and 12-hour test, compressor safety devices, purifier bowl speed and sealing water. Attach the relevant SOLAS or class requirement to each number.
On electrical and control questions the candidate answers at the level of the operator interface ("the alarm came up, so I reset it") instead of explaining the circuit or control loop, cannot describe safe isolation and lockout/tagout for a motor or switchboard, and does not distinguish an alarm from a trip or a first-up alarm from a consequential one.
Many engineer candidates have limited electrical training and avoid the subject, learning only what is needed to operate. The result is weak grasp of protection coordination, insulation testing, and the logic of alarm and trip systems, which are exactly what scenario questions probe.
What to do instead
Study one-line diagrams until you can trace start, run, and trip circuits for a motor starter and a generator breaker. Learn the isolation procedure as a sequence (identify, isolate, prove dead, lock and tag, prove dead again, permit). Practise explaining first-up alarm identification and why resetting without investigation is dangerous.
Stability and damage-control answers ignore the machinery-space perspective: the candidate discusses free surface and GM in general terms but cannot say how flooding of a machinery space, a partially filled double bottom, or a large free surface in a tank under repair affects list, trim, and the ability to run the plant, nor what to do first.
Stability is often studied as a deck officer subject and revised separately from engineering, so the candidate has the theory but has not connected it to machinery-space flooding, bilge system capability, or the decision to keep or stop pumps and generators.
What to do instead
Work through machinery-space flooding scenarios: effect on list and GM, which pumps and bilges are available, cross-flooding, the order of securing or starting machinery, and when to inform the Master and prepare to abandon. Learn the bilge and ballast system layout of a typical ship and the meaning of the damage control plan symbols.
Emergency and pollution-response answers list the equipment ("use the SOPEP locker, sound the alarm") but not the command sequence: who is informed, in what order, what is isolated, what is recorded, and what reports are made externally. The candidate also confuses the SOPEP and the SMS emergency procedures and cannot name the reportable pollution thresholds.
Drills are experienced as a routine that someone else leads, so the candidate has never had to produce the sequence from memory. The reporting chain and the statutory reporting duty (immediate notification of a discharge, with the written follow-up) are rarely rehearsed in writing.
What to do instead
Write out the sequence for three scenarios from blank paper: oil spill to sea, engine room fire, and blackout. For each, list alarm and muster, isolation and containment, notification to Master, Chief Engineer, company, and coastal state, log entries, and the written report. Learn the SOPEP contents and where the plan and contact list are kept.
Maintenance and repair answers describe the task but omit the planning and control elements: risk assessment and permit to work, isolation, spare parts and manuals, class and statutory survey implications, and the record that must be made afterwards. The candidate also cannot distinguish planned maintenance from condition monitoring or explain how a defect becomes a deferred item with an agreed deadline.
Candidates learn maintenance as hands-on procedure and treat paperwork as administration. Exam questions test the whole management cycle, including the classification-society requirement to report damage and the Chief Engineer's responsibility for the planned maintenance system.
What to do instead
For each maintenance task, practise writing the full package: scope, risk assessment, permit, isolation, tools and spares, procedure reference, test after completion, record and defect close-out. Learn what must be reported to class and flag state and which surveys depend on machinery being opened or tested.
Human element and leadership answers stay abstract ("communicate well", "be a good leader", "manage fatigue") with no concrete behaviour, no reference to the specific situation, and no recognition of the authority gradient that stops a junior from speaking up about a defect.
These topics are dismissed as common sense, so candidates do not prepare specific examples or vocabulary. They also underestimate how much of the marking depends on naming observable behaviours, such as a structured briefing, closed-loop communication, and a documented challenge to an unsafe instruction.
What to do instead
Prepare short, concrete examples for each theme: a toolbox talk before a job, a challenge to an unsafe instruction, a fatigue report, a near-miss investigation, and a cross-cultural communication problem in a multilingual engine room. Use the language of behaviour and outcome, and link each example to the safety management system.
The candidate mismanages time and question selection: spending too long on a favourite technical question, leaving scenario and law questions unanswered or answered in one line, and not reading the command word (state, explain, describe, list) so that a question asking for an explanation receives a bare list.
Technical confidence pulls candidates towards the questions they enjoy, and the command words are skimmed. Marks are allocated to the depth of answer the command word demands, so a list where an explanation was required earns a fraction of the available marks regardless of technical accuracy.
What to do instead
In practice papers, allocate minutes per mark and keep to it, answer every question at least briefly, and underline the command word before writing. Match the answer structure to the verb: list means bullet points, describe means what happens and in what order, explain means why it happens and what it leads to. Leave space to return to weak answers.