Author: UKM TUTICORIN

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(a) Describe, with the aid of a sketch, a diesel engine fuel system which employs direct injection of liquid gas into engine cylinders (12) (b) Explain the advantages of this type of gas injection system compared with the use of gaseous fuel in the form of gas (4) Dual fuel Dec 2020 (Q6)

EK General Oct 2022 (Q5)

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Describe, with the aid of a sketch, the operation of a biological sewage treatment plant. (10) Sewage system Oct 2022 (Q5)

EK Motor Dec 2020 (Q5)

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With reference to marine diesel engine (SCR) (a) Explain, with the aid of a graph, the influence of the fuel sulfur content 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 sulfur content (4)…

EK General Oct 2022 (Q4)

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With reference to heat exchangers, describe how EACH of the following design aspects promote heat transfer: (a) material selection; (5) (b) flow patterns; (3) (c) extended surface areas. (2) Heat exchanger Oct 2022 (Q4)

EK Motor Dec 2020 (Q4)

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(a) Explain why multiple air inlet and exhaust valves are fitted to some medium speed diesel engines (4) (b) Explain how the valve actuator (tappet) clearance is set for multiple valve installations (4) (c) Write a procedure for checking the valve operating mechanics of a medium speed engine (8) Cylinder head Dec 2020 (Q4)

EK General Oct 2022 (Q3)

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(a) Sketch a muff type propeller shaft coupling. (5) (b) Describe how this type of coupling is connected. (5) Propeller, shafting & thrusters Oct 2022 (Q3)

EK Motor Dec 2020 (Q3)

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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 General Oct 2022 (Q2)

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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 2022 (Q2)

EK Motor Dec 2020 (Q2)

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(a) Describe, with the aid of a sketch, a main engine fuel oil circulating system incorporating the MGO and HFO service tanks, a fuel oil change-over system, heating and viscosity control system and tank return system (10) (b) Write instructions for changing the system described in part (a) of the question from MGO to HFO,…

EK General Oct 2022 (Q1)

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