Tag: #ukmmarineengineering

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With reference to a.c switchboards: (a) State, with reasons, the protective devices that are fitted; (5) (b) State why a breaker may fail to open under prolonged low voltage conditions; (2) (c) Explain the actions to be taken should a main generator circuit breaker stay connected despite repeated efforts to trip it off the board.…

EK Electrical Aug 2020 (Q9)

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in EK ELECTRICS

Describe the construction and operation of EACH of the following: (a) synchronous motor; (5) (b) induction motor. (5) Aug 2020 (Q9)

EK Motor Dec 2024 (Q9)

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With reference to diesel engine SOx exhaust gas cleaning and pollution control: (a) state, with reasons, which system parameters are monitored, explaining where the monitoring devices are located, how the data is stored and how data is made available to regulatory authorities; (10) (b) state how pollution of sea water can be caused by the…

EK Motor Dec 2024 (Q8)

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(a) With reference to an engine cylinder liner explain the term “Thermal Stress”, indicating how and why it occurs during operation of an engine. (4) (b) Explain how the upper part of a cylinder liner is subjected to fatigue during engine operation. (4) (c) Explain how thermal stress and fatigue combine and can lead to…

EK Motor Dec 2024 (Q7)

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(a) Write a procedure for the action a duty engineer should take on being called to the engine room during a UMS period in the event of an engine slowdown due to a high cylinder exhaust temperature on the main propulsion engine. (6) (b) State, with reasons, the possible causes of a high exhaust temperature…

EK Motor Dec 2024 (Q6)

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(a) Explain how diesel engine cylinder performance is checked. (4) (b) Sketch an indicator diagram showing good cylinder combustion and on the same indicator diagram show combustion defects due to EACH of the following: (i) Early fuel injection; (2) (ii) Late fuel injection; (2) (iii) Poor fuel atomisation. (2) (c) Explain how the cylinder combustion…

EK Motor Dec 2024 (Q5)

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(a) Explain how the build up of residue in the scavenge space of a large slow speed two stroke engine is minimised by design, operation and maintenance. (10) (b) Explain the possible damage which could be caused by a scavenge fire. (6) Dec 2024 (Q5)

EK Motor Dec 2024 (Q4)

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(a) State, with reasons, the properties required of a lubricating oil for a trunk piston type, medium speed engine, indicating why some properties differ from those required of a lubricating oil used in the crankcase of a crosshead diesel engine. (6) (b) Describe, with the aid of a sketch, the lubrication system of a trunk…

EK Motor Dec 2024 (Q3)

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(a) Explain why an engine may fail to start on air when the start air receiver is fully charged and the air receiver outlet to the engine is open. (10) (b) Describe how problems with air starting systems may be avoided. (6) Dec 2024 (Q3)

EK Motor Dec 2024 (Q2)

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