Author: UKM TUTICORIN

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With reference to abnormal and excessive cylinder liner wear: (a) Explain how it may be caused, stating how it is detected; (6) (b) Explain the effects and consequences of excessive cylinder liner wear; (5) (c) Explain how abnormal cylinder liner wear may be prevented. (5) Cylinder liner Jul 2020 (Q6)

EK General Oct 2020 (Q6)

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With reference to a ship’s air conditioning plant: (a) define the term comfort zone; (2) (b) state the objectives of maintaining the conditioned air within the comfort zone, (3) (c) state, with reasons, FIVE areas from which the conditioned air must not be recirculated. (5) Reefer & A/C Oct 2020 (Q6)

EK Motor Jul 2020 (Q5)

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(a) Explain, with the aid of sketches, the gas combustion process in a dual fuel medium speed main engine, operating with pilot injection. (10) (b) Explain what is meant by exhaust gas recirculation and how this may be effective in reducing air pollution. (6) Dual fuel Jul 2020 (Q5)

EK General Oct 2020 (Q5)

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(a) Describe the principle of operation of a biological sewage treatment plant. (4) (b) Explain how anaerobic conditions can occur within a sewage treatment plant, stating the hazards that may be encountered. (4) (c) Explain the meaning and significance of the term biological oxygen demand. (2) Sewage system Oct 2020 (Q5)

EK Motor Jul 2020 (Q4)

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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) Bearings Jul 2020 (Q4)

EK General Oct 2020 (Q4)

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With reference to vessels fitted with podded propulsion systems capable of being rotated through 360°: (a) State the advantages claimed over conventional shafting and steering arrangements; (6) (b) State, with reasons, the type of vessels that are most suited to this means of propulsion. (4) Propeller, shafting & thrusters Oct 2020 (Q4)

EK General Oct 2020 (Q3)

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(a) Explain EACH of the following control terms: (i) Proportional action; (2) (ii) Integral action. (2) (b) Describe, with the aid of a sketch, a control system that may be enhanced by the inclusion of cascade control. (6) Control system Oct 2020 (Q3)

EK Motor Jul 2020 (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 General Oct 2020 (Q2)

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Explain EACH of the following metallurgical processes: (a) induction hardening; (3) (b) nitriding; (3) (c) case hardening. (4) Materials Oct 2020 (Q2)

EK Motor Jul 2020 (Q2)

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