Tag: #ekmanagmentwritten

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(a) Describe with the aid of sketches the operation of a four-stroke dual fuel engine, explaining how the correct amount of gaseous and liquid fuels are supplied to the cylinders to meet the power requirement and how the cylinder charge is ignited. (10) (b) State, with reasons, three problems associated with the burning of gaseous…

EK Motor Oct 2023 (Q9)

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With reference to an economiser: (a) write a procedure for the cleaning of the gas side of an economiser when the associated main engine is: (i) Running; (5) (ii) Stopped. (5) (b) Write a procedure for operation of the main engine when the associated economiser cannot be operated due to tube failure. (6) Oct 2023…

EK Motor Oct 2023 (Q8)

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(a) With the aid of sketches, explain the term “fatigue” as applicable to engineering components. State what is meant by the term “fatigue limit”. (12) (b) Explain the term “stress raiser” with respect to fatigue, giving THREE examples and stating how stress raisers reduce the fatigue life of a component. (4) Oct 2023 (Q8)

EK Motor Oct 2023 (Q7)

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(a) As Chief Engineer Officer, explain how the performance of a main diesel engine may be determined, indicating how the information collected is analyzed to assess the performance of an individual cylinder in relation to the overall engine performance. (6) (b) Explain how defective fuel injection may be detected, stating, with reasons, the causes of…

EK Motor Oct 2023 (Q6)

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With reference to turbocharger systems: (a) Describe, with the aid of a sketch, a turbocharger jet assist system, explaining how it operates and why it is used (10) (b) Describe, with the aid of a sketch, a wastegate and bypass system, explaining why such an arrangement is fitted (6) Oct 2023 (Q6)

EK Motor Oct 2023 (Q5)

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(a) Describe, with the aid of a sketch, a main engine starting air system, stating the safety devices which are incorporated (8) (b) In the event of the main engine failing to turn on air even though there was sufficient air pressure in the starting air receivers, explain the procedure for tracing the cause of…

EK Motor Oct 2023 (Q4)

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With reference to diesel engine NOx emissions and control: (a) Explain how exhaust gas recirculation and direct water injection reduce engine NOx emissions but result in increased specific CO2 emissions (6) (b) Describe, with the aid of a sketch, a Selective Catalytic Reduction system, stating with reasons, the monitoring and control system required (10) Oct…

EK Motor Oct 2023 (Q3)

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(a) Sketch a main engine electronically controlled fuel injection system (6) (b) Explain how fuel injector quantity and timing is changed in the fuel injection system sketched in (a) (6) (c) State why it may be necessary to change engine fuel injection timing (4) Oct 2023 (Q3)

EK Motor Oct 2023 (Q1)

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As Chief Engineer Officer, write a report to the vessel’s owners proposing the adoption of onboard HFO sample testing, explaining which properties would be tested and the operational benefits which may be achieved. (16) Oct 2023 (Q1)

EK Motor Jul 2023 (Q9)

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