Category: EK Motor
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EK Motor Dec 2022 (Q2)
(a) Describe, with the aid of a sketch, a diesel engine NOx reduction system using chemical supply, explaining the safety and pollution avoidance systems required. (12) (b) Explain chemical reactions involved in the NOx reduction system described in part (a) of the question (4) Dec 2022 (Q2)
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EK Motor Dec 2022 (Q1)
Write a report to the engineering superintendent regarding the failure of a main crosshead engine fuel pump cam and follower where the damage was so severe that the normal pump lifting equipment could not be immediately fitted. The report must explain how the defect was detected, the immediate action taken. the rectifying action taken to…
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EK Motor Oct 2022 (Q9)
With reference to waste heat system generation systems: (a) describe, with the aid of a sketch, the water/steam circulation system for the waste heat recovery section; (5) (b) explain how the economiser circulation pumps are kept cool; (3) (c) describe how system steam pressure is maintained and the system operated when the associated diesel engine…
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EK Motor Oct 2022 (Q8)
With reference to diesel engine NOx emissions: (a) explain how NOx is formed during operation of the engine, indicating why the aim of high engine efficiency increases the problem; (6) (b) describe ONE external means by which diesel engine NOx emissions may be reduced in order to meet current regulations. (10) Oct 2022 (Q8)
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EK Motor Oct 2022 (Q7)
(a) Describe, with the aid of a sketch, a main engine and generator fuel system which has the capability of changing the generators from HO to MDO operation whilst maintaining circulation of HFO in the main engine system. (8) (b) Write instructions for the change of the generator engines to operation on MDO whilst keeping…
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EK Motor Oct 2022 (Q6)
(a) Describe, with the aid of a sketch, an engine cooling water waste heat recovery system for generating electricity, explaining how the system operates. (8) (b) Describe, with the aid of sketches if necessary, how waste heat recovered for diesel engine cooling water can be utilized throughout the ship for different heating purposes, explaining how…
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EK Motor Oct 2022 (Q5)
Q5 (a) Describe, with the aid of a sketch, a main engine starting air system, stating the safety devices which are incorporated. (8) (b) In the event of the main engine failing to turn over on air even though there was sufficient air pressure in the starting air receivers, explain the procedure for tracing the…
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EK Motor Oct 2022 (Q4)
(a) Describe, with the aid of a sketch, a cylinder arrangement for a dual fuel 2-stroke engine, explaining how the gaseous fuel is delivered to the cylinder and ignited. (12) (b) Explain the term Methane Slip in reference to a dual fuel engine, stating why it occurs and the effect on the atmosphere. (4) Dual…
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EK Motor Oct 2022 (Q3)
With reference to failure of fuel injector nozzles due to burning: (a) state, with reasons, THREE possible causes; (6) (b) write a procedure to be used when investigating the cause of fuel injector nozzle burning; (6) (c) describe a maintenance system which should be operated in order to minimize the risk of future fuel injector…
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EK Motor Oct 2022 (Q2)
(a) Explain, with the aid of a sketch, Thermal Stress, stating how thermal stress is induced in the cylinder liner when the engine is operating. (8) (b) Explain why thermal stress may be damaging to an engine cylinder. (4) (c) Explain how thermal stress may be avoided in an operating engine without reducing engine power…
