Category: EK Motor

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With reference to medium speed diesel engine cylinder liners: (a) Explain the cause and effects of liner polishing or glazing; (6) (b) Explain the action of an anti-polishing ring during the operation of the engine; (5) (c) Describe how effective cylinder lubrication is achieved. (5) Cylinder liner Jul 2017 (Q9)

EK Motor Jul 2017 (Q8)

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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 Motor Jul 2017 (Q7)

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(a) Describe, with the aid of sketch, the arrangement of the gas and liquid fuel systems at the cylinder of a dual fuel 4-stroke engine, stating the input and output signals at the controller (12) (b) Describe the arrangement of the gas fuel piping system used for a 4-stroke dual fuel engine, stating the safety…

EK Motor Jul 2017 (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 2017 (Q5)

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(a) Describe, with the aid of sketches, the procedure for lifting a cylinder cover from a slow speed crosshead engine, explaining how the lifting gear is attached to the cover (6) (b) State the risks that may be associated with lifting a cylinder cover using the procedure described in part (a) (c) Describe the arrangement…

EK Motor Jul 2017 (Q4)

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With reference to a closed loop engine exhaust gas SOx scrubber system: (a) Describe, with the aid of a sketch, such a system (8) (b) State, with reason, the fluid which is used for SOx scrubbing in this system (4) (c) State how the effectiveness of the scrubbing fluid is maintained and how the sludge…

EK Motor Jul 2017 (Q3)

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(a) Explain why a diesel engine cylinder is supplied with excess air (4) (b) Explain why fuel droplet size produced during injection has to be within narrow limits in order to enable good cylinder combustion to be achieved (4) (c) Explain how the desired fuel droplet size is produced by fuel injectors (4) (d) State…

EK Motor Jul 2017 (Q2)

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With reference to main engine crankcase explosions: (a) Explain the cycle of events leading to a secondary crankcase explosion (6) (b) As Chief Engineer Officer, explain how an engine system should be managed in order to minimize the risk of a crankcase explosion and the effects of a crankcase explosion should one occur. (10) Crankcase…

EK Motor Jul 2017 (Q1)

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As Chief Engineer Officer, write a report to the engineering superintendent regarding failure of a four-stroke main engine, to complete a slow turning procedure and the discovery of water around a cylinder head gasket after the failed slow turning attempt. The report must outline the possible cause of the problem and the steps taken to…

EK Motor Mar 2017 (Q9)

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