Author: UKM TUTICORIN

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During a complete loss of electrical power, essential vital services can be maintained by means of an Uninterrupted power supply (UPS) (a) Describe, with the aid of a block diagram, the operation of an AC input UPS arrangement (7) (b) List SIX essential services that UPS may support. (3) Batteries & Emco power supplies Dec…

EK Electrical Dec 2018 (Q9)

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With reference to paralleling AC generators (a) Outline the requirement for synchronization (2) (b) Explain how KW power is shared (1) (c) Explain how KVar power is shared (1) (d) State SIX types of damage that may be caused when machines are incorrectly synchronised. (6) Generator & circuit protection Dec 2018 (Q9)

EK Electrical Oct 2018 (Q11)

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With reference to lithium-ion batteries: (a) Explain why this type of batteries has been adapted for shipboard use (4) (b) State ONE advantage and ONE disadvantage of lithium-ion batteries (2) (c) Define EACH of the following terms (i) Cell drift (2) (ii) Thermal runaway (2) Batteries & Emco power supplies Oct 2018 (Q11)

EK Electrical Oct 2018 (Q10)

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(a) Sketch a circuit diagram of an emergency generator power supply and distribution system, indicating the essential services provided. (6) (b) state the emergency generator regulations. (4) Batteries & Emco power supplies Oct 2018 (Q10)

EK Motor Jul 2022 (Q4)

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in EK Motor

(a) Describe a procedure for cylinder liner calibration, indicating how the readings are recorded to allow for easy recognition of liner wear (6) (b) Describe TWO forms of abnormal cylinder wear, explaining how EACH is recognised (6) (c) Explain how abnormal cylinder liner wear may be prevented (4) Cylinder liner Jul 2022 (Q4)

EK Electrical Oct 2018 (Q9)

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Describe, with the aid of a circuit diagram, the operation of a shaft generator that uses a frequency converter (10) AC Generator Oct 2018 (Q9)

EK Motor Jul 2022 (Q3)

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in EK Motor

(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 Electrical Jul 2018 (Q11)

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(a) Explain the principle of operation of an insulation resistance test, stating why the test is carried out on a regular basis (6) (b) Describe how EACH of the following electrical tests is carried out (i) Resistance (2) (ii) Continuity. (2) Electric motors Jul 2018 (Q11)

EK Electrical Jul 2018 (Q10)

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Describe with the aid of a circuit diagram, the operation of an automatic voltage regulator, which employs the use of thyristor (10) AC Generator Jul 2018 (Q10)

EK Motor Jul 2022 (Q2)

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