Tag: #ukmmarineengineering

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With reference to fatigue cracking: (a) describe, with the aid of an S/N curve, the relationship between applied stress and the number of applied stress fluctuations in fatigue crack propagation (5) (b) Define the term Stress Raiser, giving examples and explaining the influence of a stress raiser on the propagation of a fatigue crack (5)…

EK Motor Jul 2019 (Q9)

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(a) Explain the possible causes and actions to be taken in the event of a high exhaust temperature on a four stroke generator engine at (i) A single cylinder (3) (ii) more than one cylinder (3) (b) explain why multiple air inlet and exhaust valves are fitted to highly rated 4-stroke engines (4) (c) Describe…

EK Motor Jul 2019 (Q8)

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(a) Describe, with the aid of a sketch, a Selective Catalytic NOx Reduction system, explaining the chemical reaction for reducing NOx and the control system requirements (10) (b) State two engine based systems for reducing marine diesel engine NOx, explaining how they reduce NOx level but also increase fuel consumption and CO2 emissions Emission control…

EK Motor Jul 2019 (Q7)

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(a) Describe, with the aid of a sketch, a main engine and generator fuel system which has the capability of changing the generators from HFO to MDO operation whilst maintaining circulation of HFO in the main engine system (8) (b) write instruction for the change of the generator engines to operation on MDO whilst keeping…

EK General Dec 2019 (Q8)

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in EK GENERAL

During bunkering operations, a section of deck bunker line starts leaking fuel oil from a pinhole at the mid section of the pipe. (a) As Chief Engineer Officer, state the immediate actions to be taken to avoid a potential pollution incident; (6) (b) Explain how a permanent repair could be made, stating any precautions to…

EK General Dec 2019 (Q7)

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in EK GENERAL

Following a serious machinery space fire, the engine room was abandoned and an inert gas smothering agent used to extinguish the fire. Explain the sequence of events which led to this course of action and the subsequent actions taken to enable the vessel to proceed on passage. (10) Fire Dec 2019 (Q7)

EK Motor Jul 2019 (Q6)

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With reference to two stroke, slow speed engine pistons: (a) Explain what is meant by the term thermal stress and how this can cause cracking of crown surface (4) (b) Sketch a cross-section of a piston, labeling the main components and indicating coolant flow (8) (c) State a cause of EACH of the following defects…

EK Motor Jul 2019 (Q5)

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(a) With the aid of sketches, describe the operation of a dual fuel 4-stroke engine when operating on gas (10) (b) For the engine described in (a), Explain how and when the fuels are supplied to the cylinders (6) Dual fuel Jul 2019 (Q5)

EK General Dec 2019 (Q6)

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in EK GENERAL

(a) Sketch a diagrammatic arrangement of a fully automatic direct expansion domestic refrigeration system. (5) (b) State, with reasons, FIVE desirable thermodynamic properties of a refrigerant. (5)Reefer & A/C Dec 2019 (Q6)

EK Motor Jul 2019 (Q4)

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