Author: UKM TUTICORIN

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With reference to centrifugal pumps: (a) Describe how EACH of the following improves pump performance: (i) Raising the speed of rotation (2) (ii) Multi-staging (2) (b) Explain the advantages of using centrifugal pumps instead of positive displacement pumps for lubricating oil circulating duties (6) Pumps & system Dec 2023 (Q5)

EK General Dec 2023 (Q4)

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With reference to plate type heat exchangers: (a) Sketch a cross sectional view showing the plate design pattern and the directions of hot and cold fluid flow (4) (b) State TWO reasons for the plate design patterns (2) (c) State, with reasons, FOUR advantages of a plate cooler compared to shell and tube type. (4)…

EK General Dec 2023 (Q3)

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With reference to main propulsion shaft systems: (a) Describe a method of hydraulic jacking to check bearing loads (5) (b) Sketch the Bearing Load versus Shaft Lift Dial Gauge Reading graph obtained by the method described in part (a), annotating the graph and how the characteristic of bearing load is obtained. (5) Propeller, shafting &…

EK General Dec 2023 (Q2)

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Discuss the advantages and disadvantages of electrical remote monitoring and control systems compared to pneumatic systems. (10) Instrumentation & control Dec 2023 (Q2)

EK General Dec 2023 (Q1)

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(a) Sketch a Stress/Strain curve for a mild steel test specimen. (2) (b) With reference to the curve sketched in part (a), explain EACH of the following: (i) Modulus of elasticity (2) (ii) Percentage elongation (2) (iii) Ultimate tensile stress (2) (iv) Yield stress (2) Materials Dec 2023 (Q1)

EK General Oct 2023 (Q8)

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With reference to a major fire in the machinery space: (a) Explain why EACH of the following equipment is shut down remotely, stating how it is achieved: (i) Settling und service tank outlet valves (ii) Fuel transfer and supply pumps (2) (iii) Mechanical and natural ventilation (2) (b) Explain how the fire is brought under…

EK General Oct 2023 (Q7)

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(a) State the possible causes for EACH of the following auxiliary diesel engine lubricating oil sample results (i) High acidity (2) (ii) High sediment content (2) (iii) Excessive water content (2) (iv) Fuel dilution (2) (b) Explain which of the results in (a) would give greatest concern. (2) Lubricating oil & system Oct 2023 (Q7)

EK General Oct 2023 (Q6)

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(a) Sketch a diagrammatic arrangement of a fully automatic direct expansion domestic refrigerant system (5) (b) Explain the operation of the Low Pressure switch (2) (c) State, with reasons, THREE possible faults that could cause the High Pressure switch to operate (3) Reefer & A/C Oct 2023 (Q6)

EK General Oct 2023 (Q5)

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State the inspections, instructions and maintenance that should be carried out on a main sea water pipelines, strainers and ship’s side valves to minimize the risks of engine room flooding (10) Materials Oct 2023 (Q5)

EK General Oct 2023 (Q4)

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