Author: UKM TUTICORIN

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With reference to fatigue of engineering components: (a) Draw an S/N curve for steel, showing the Fatigue Limit and two representative stress-cycle conditions on the graph (4) (b) Explain how a component is designed to avoid fatigue failure, using the S/N curve drawn in part (a) (4) (c) Explain how poor maintenance and incorrect machinery…

EK Motor Jul 2023 (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 2023 (Q5)

EK Motor Jul 2023 (Q4)

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(a) Sketch a diesel engine high pressure common rail fuel system, labeling the MAIN parts (8) (b) Describe how the common rail system sketched in (a) operates, explaining how fuel injection timing is controlled (8) Jul 2023 (Q4)

EK Motor Jul 2023 (Q3)

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With reference to marine diesel engine Selective Catalyst Reduction (SCR) (a) Explain, with the aid of a graph, the influence that fuel sulfur content has on the operation of an SCR unit (4) (b) Explain how the operation of a turbocharger system can have a detrimental effect on the unit when burning fuels with higher…

EK Motor Jul 2023(Q2)

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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) Jul 2023 (Q2)

EK Motor Jul 2023 (Q1)

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Write a report to the Superintendent Engineer regarding a number of cases of severe damage to medium speed engine exhaust valves in the previous 12 months. The report must outline the probable cause of the damage and must suggest future steps to avoid similar incidents. Jul 2023 (Q1)

EK Motor Mar 2023 (Q9)

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With reference to medium speed diesel engine cylinder liners (a) Explain the cause and effect of liner polishing and 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) Mar 2023 (Q9)

EK Motor Mar 2023 (Q8)

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(a) Explain, with the aid of sketch, 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) Mar 2023 (Q8)

EK Motor Mar 2023 (Q7)

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With reference to diesel engine starting air systems: (a) write instructions for the checking of the starting air system in order to determine the reason for an engine failing to turn over when the starting air system is activated (6) (b) Describe the procedure for checking and preparing a starting air receiver for survey (6)…

EK Motor Mar 2023 (Q6)

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