Category: EK Motor

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(a) Explain why turbochargers are fitted to some diesel engines and describe how they efficiently achieve that aim (6) (b) Describe, with the aid of a sketch, a turbocharger installation showing the paths of engine exhaust gas, charge air and cooling water. State the monitoring systems provide for the system, explaining why they are fitted,…

EK Motor Jul 2024 (Q7)

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With reference to diesel engine hybrid SOx scrubber systems: (a) State the fluids used in the open and closed loop of the scrubber, explaining how these fluids are controlled to meet the scrubbing demand at different engine loads (6) (b) State the circumstance under which Open Loop scrubbing would be used and Closed Loop scrubbing…

EK Motor Jul 2024 (Q6)

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A significant number of machinery failures are due to poor maintenance techniques. State, with reasons, the possible consequences of poor maintenance techniques on EACH of the following: (a) Main engine lubricating oil self cleaning filters (4) (b) Cylinder liner honing (4) (c) Auxiliary engine bottom end bearing overhaul (4) (d) Fitting of piston compression and…

EK Motor Jul 2024 (Q5)

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(a) Describe the procedure for entry into, and inspection of, the inside of a starting air receiver, stating the types of defects which may be present with their possible causes (12) (b) Describe the procedure of closing up the air receiver and the initial pressurization to working pressure (4) Jul 2024 (Q5)

EK Motor Jul 2024 (Q4)

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(a) Describe, with the aid of a sketch, the HT and LT cooling water systems for a combined pair of medium speed engines in an installation. (12) (b) For the system described in part (a), explain how a shut-down engine is maintained at the correct temperature for immediate starting when the associated engine is also…

EK Motor Jul 2024 (Q3)

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(a) Explain why highly efficient diesel engines tend to produce more NOx than low performance diesel engine (4) (b) Describe, with the aid of a sketch, a Selective Catalytic Reduction (SCR) unit for a marine propulsion diesel engine (8) (c) Explain why accurate monitoring of the exhaust gas flows entering and leaving a selective catalytic…

EK Motor Jul 2024 (Q2)

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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 Jul 2024 (Q1)

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As Chief Engineer, write a report for the engineering superintendent regarding the checking of a bottom end bearing on a crosshead type main diesel engine, after a high temperature alarm was activated at sea, and the subsequent return to full service of the engine. (16) Jul 2024 (Q1)

EK Motor Mar 2024 (Q9)

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With reference to boilers and steam generation systems: (a) Explain the term water hammer, stating how it is caused and describing the possible consequences of it (4) (b) Explain how water hammer can be avoided (4) (c) Describe, with the aid of a sketch, how the boiler fuel system may be operated in port to…

EK Motor Mar 2024 (Q8)

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