Category: EK Motor

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Write a report for the engineering superintendent regarding the replacement at sea of bearings on one of the main engine turbochargers. The report must explain how the bearing defects were detected, the likely cause of the damage and the action which has been implemented to prevent further incidents of this type. (16) Scavenging & Turbocharger…

EK Motor Jul 2022 (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) Scavenging &…

EK Motor Jul 2022 (Q8)

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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 injections (4) (d) State…

EK Motor Jul 2022 (Q7)

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(a) Describe, with the aid of a sketch, a main engine fresh water cooling water system, incorporating HT and LT system (10) (b) Describe the charge air supply system for a turbocharged engine, explaining the purpose of each main part. (6) Cooling system & FWG Jul 2022 (Q7)

EK Motor Jul 2022 (Q6)

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(a) Sketch a main engine electronically controlled fuel injection system (6) (b) Explain how the fuel injector quantity and timing is changed in the fuel injection system sketched in part (a) (6) (c) State why it may be necessary to change the engine fuel injection timing (4) Electronic engine & common rail Jul 2022 (Q6)

EK Motor Jul 2022 (Q5)

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(a) Discuss the dangers associated with a main engine starting air system, explaining how these dangers are mitigated. (9) (b) State, with reasons, THREE causes of an engine failing to fire on fuel after successfully turning over on starting air. (3) (c) Explain how the engine is transferred to local (engine side) control in the…

EK Motor Jul 2022 (Q4)

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(a) Describe a procedure for cylinder liner calibration, indicating how the readings are recorded to allow for easy recognition of liner wear (6) (b) Describe TWO forms of abnormal cylinder wear, explaining how EACH is recognised (6) (c) Explain how abnormal cylinder liner wear may be prevented (4) Cylinder liner Jul 2022 (Q4)

EK Motor Jul 2022 (Q3)

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(a) Describe, with the aid of a sketch, a Selective Catalytic NOx Reduction system, explaining the chemical reaction for reducing NOx and the control system requirements. (10) (b) State two engine based systems for reducing marine diesel engine NOx, explaining how they reduce NOx level but also increase fuel consumption and CO2 emissions. (6) Emission…

EK Motor Jul 2022 (Q2)

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(a) Explain fatigue cracking, stating its causes and propagation. (8) (b) Explain how the risk of fatigue cracking of cylinder head holding studs is liable to be increased by poor maintenance and engine overload. (8) Materials Jul 2022 (Q2)

EK Motor Jul 2022 (Q1)

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