Tag: #ukmmarineengineering

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With reference to air compressors for general service use: (a) Explain the principle of operation of a screw type compressor (4) (b) Explain the advantages of screw compressors over reciprocating compressors in terms of running and maintenance (6) Compressed air system Jul 2024 (Q7)

EK General Jul 2024 (Q6)

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in EK GENERAL

With reference to a keyless propeller designed for hydraulic (wet) fit and withdrawal: (a) Describe, with the aid of a sketch, how the propeller is fitted to the tail shaft; (6) (b) State TWO advantages compared to a dry fit; (2) (c) Explain how the thrust is transmitted without the use of a key and…

EK General Jul 2024 (Q5)

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in EK GENERAL

With reference to centrifugal pumps and pumping systems: (a) Explain, with the aid of a diagram, the distinction between Net Positive Suction Head available (NPSHa) and Net Positive Suction Head required (NPSHr) (8) (b) Explain how the NPSHa may be increased by design (2) Pumps & system Jul 2024 (Q5)

EK General Jul 2024 (Q4)

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in EK GENERAL

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 Mar 2022 (Q9)

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With reference to waste heat steam generation systems: (a) Describe, with the aid of a sketch, the economizer circulation system (5) (b) Explain how the economizer circulation pumps are kept cool (3) (c) Describe how the boiler water is maintained in a condition which minimizes scale formation and system corrosion (8) WHRS & Boiler Mar…

EK Motor Mar 2022 (Q8)

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With reference to LNG diesel engine installations: (a) Describe, with the aid of a sketch, a Gas Valve Unit, explaining its purpose and indicating where it is located in the gas train (8) (b) Explain why ventilation and inert gas system must be installed with the engine fuel gas system (4) (c) state why pilot…

EK Motor Mar 2022 (Q7)

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(a) State, with reasons, THREE properties required of a cylinder lubricant for a main engine operating on HFO (6) (b) Describe, with the aid of sketches, an electronically controlled cylinder lubricating system, stating how the timing and quantity of cylinder lubricant is regulated and set. (10) Lubricating oil & system Mar 2022 (Q7)

EK Motor Mar 2022 (Q6)

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With reference to engine fuel injector nozzle cooling: (a) Explain why fuel injector nozzle cooling is necessary (4) (b) Describe, with the aid of a sketch, the operation of a nozzle cooling system for a generator engine (8) (c) Explain how fuel injector nozzles are cooled on engine which are not fitted with a separate…

EK Motor Mar 2022 (Q5)

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With reference to an engine air starting system. (a) Explain why a slow turning system is fitted (4) (b) State, with reasons, when a slow turning system operates (2) (c) Describe with the aid of a sketch, an air starting system, explaining how the slow turning system operates (10) Starting & control Mar 2022 (Q5)

EK Motor Mar 2022 (Q4)

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