Author: UKM TUTICORIN

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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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(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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(a) Describe a procedure for cylinder liner calibration, indicating how the reading are recorded to allow for easy recognition of liner wear (6) (b) Describe TWO forms of abnormal cylinder wear, explaining how EACH is recognised (6) (c) Explain how abnormal cylinder liner wear may be prevented. (4) Cylinder liner Jul 2019 (Q4)

EK General Dec 2019 (Q5)

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With reference to multi-tubular heat exchangers, explain how EACH of the following contribute to satisfactory performance: (a) Tube wall thickness (2) (b) Dense population of tubes in the tube plate (2) (c) Tube materials selection (2) (d) Coolant flow rates (2) (e) Unimpeded passage of coolant at entry and exit from the tubes (2) Heat…

EK Motor Jul 2019 (Q3)

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Write a report to the engineering superintendent regarding the failure at sea of a crosshead main engine bottom end bearing. The report must explain how the defect was detected, the immediate action taken to prevent further engine damage, the subsequent action taken to ensure that the vessel was able to continue on passage to the…

EK General Dec 2019 (Q4)

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(a) Describe TWO system of priming centrifugal pumps (6) (b) List the advantages of EACH of the priming methods described in part (a) (4) Pumps & system Dec 2019 (Q4)

EK Motor Jul 2019 (Q2)

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(a) Explain why an engine may fail to start on air when the start air receiver is fully charged and the air receiver outlet to the engine is open (10) (b) Describe how problem with air starting system may be avoided (6) Starting & control Jul 2019 (Q2)

EK General Dec 2019 (Q3)

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