[esailor Team]

Examiner: Thomas Maddison 2nd Engineer Unlimited Oral Exam Online
Result: Pass KERLAN (GMA Candidate)
Checks documents and NOE for CoC being examined for.
Check vessel type experience and engine types
1. Draw 4 stroke or 2 stroke timing diagram and explain the diagram cycle. (it was my choice either or, did 4 stroke)
2. How do you know fuel injection is starting at the right timing (I talked about looking at the pump camshaft and follower base circle and lobe acting on plunger, or remove erosion plugs on high pressure pump and rotate engine and observe plunger motion.)
3. Asked what may cause low peak pressure on a single unit. (poor injection, blow past, exhaust valve leaking, poor tappet clearance)
4. Take him through bunkering operation (preplanning stage, talked about stability, bunker plan and checklist, oil spill prevention, bunker delivery note, fuel declaration signed, verify quantity and type, FOBAS, SMS, sampling, oil record book, fuel surveyor, etc.)
5. Why send fuel sample ashore for analysis (pour point, flash point, density, catalyst fines, vanadium, water, sulphur)
6. Why are we interested in sulphur (for environment, acid rain, human health, spoke about ECA and Non ECA sulphur limits, spoke about fuel matching sulphur content with base number of cylinder oil to prevent corrosion)
7. Why catalytic fines are to be observed (spoke about the source from the fuel refining process, abrasion in your fuel injection system which can lead to poor atomization and after burning and black exhaust and fouling of exhaust system)
8. Mentioned vanadium effect when in fuel (spoke about high temperature corrosion of exhaust valves)
9. Why do we send lube ashore for analysis and what are you looking for (spoke of spectral analysis of the metallic fines from wear on the engine, carbon, I went on to speak about test we do onboard as well)
10. Asked about boiler, I said we had one but was only to be used offshore for oil spill recovery tanks for heating. He said that’s fine. Asked for the basic safety devices we have on boiler ( I spoke of sight glass, water level switches, safety valves, flame failure, force draft fan failure, low fuel pressure)
11. Asked if we were using calorifer onboard for heating. I mentioned we did have a separate unit which we called a boiler that was both oil fired and electrically heated which was used for jacket water heating for the engines and for the bilge settling tank heating coil. It was hot water boiler and not steam on the offshore vessel.
12. Asked to talk him through the overhaul of 1 unit on the main engine for overhaul. (I chose two stroke and talked from preplanning to doing the actual job. This was a long discussion and answered well but in the end he said I could of chose to speak of a 4 strike engine based on my experience as to him an engine is an engine)
13. Asked since I removed the piston what should I do with regards to the cylinder liner (spoke about looking for wear like scuffing and clover leafing, measure for ovality and wear with special template tool and internal gauge at each point from port to starboard and forward to aft, compare results with previous records for analysis.)
14. Asked if I were to also check the same on a 4 stroke what specific I would look at that a 2 stroke engine would not experience (spoke about gudgeon pin and crank pin bearing wear since 4 stroke experiences greater stress and higher speed at these points via the connecting rod, also spoke of the honing of the cylinder liner which is important for lube oil to cling on since 4 stroke relies on splash lubrication)
15. Asked on 4 stroke what routine parts would need to be changed ( I spoke of different filters like air and fuel however this is not what he was looking for he said what about the bolts. I said the connecting rod bolts are changed after a certain amount of running hours as they would be considered scrap after a period of stress. The question was in context to the previous question as I misunderstood and thought he move on. He was happy for that answer)
16. Asked to draw and explain a Star Delta starter for a motor only the power circuit and not the control circuit. (easy one)
17. Asked if there is an indication if it changed over to delta (I said there may be a lamp indicator to show that it has changed over but an ammeter on the circuit will show a change in the current when it transition from star to delta)
18. Asked what can happen if the motor was stuck on the Star contactor and not switched over to the delta contactor for a long time (spoke about it can become overheated and trip and the motor is an ohmic conductor)
19. Asked to take him through an enclosed space entry procedure (easy one, mentioned COSWOP chapter 15)
20. Asked what fixed firefighting system I had in the engine room. I said water mist and CO2 system. Then asked to explain the water mist system (very easy one)
21. Then asked to explain the release of CO2 system as well (easy one too, spoke of procedure prior and during release)
22. How to confirm the fire is out after release of CO2 in the space ( spoke of temperature of the space boundary, measure with inferred thermometer, if still high continue boundary cooling, vent room with fan in reverse, etc, went into great detail with this)
23. How are ships designed to stop spread of fire onboard without the use of the firefighting equipment ( spoke in detail of A60 bulkheads, dampers, and sealing of cable protrusions through bulkhead)
24. Also asked what other class bulkheads (spoke about B class and C class bulkheads as well)

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