Tag: #ukmmarineengineering

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(a) With reference to battery systems for emergency purposes, explain the precautions that must be taken with regard to personal safety, storage and maintenance. (7) (b) Explain how batteries are kept at the correct rate of charge (3) Dec 2022 (Q11)

EK Electrical Dec 2022 (Q10)

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Describe the construction and operation of EACH of the following: (a) Synchronous motor (5) (b) Induction motor (5) Dec 2022 (Q10)

EK Electrical Dec 2022 (Q9)

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(a) Explain the term power factor. (2) (b) Explain why it is detrimental to have a low power factor. (2) (c) Explain, with the aid of phasor diagrams, how a synchronous motor may be used to assist in power factor correction (6) Dec 2022 (Q9)

EK Electrical Oct 2022 (Q11)

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(a) Explain with the aid of a sketch, the principle of operation of an earth leakage detection system of the instrument type (6) (b) Explain why an insulated neutral system is used extensively on board ship (2) (c) State, with reason, why a single earth fault on a insulated neutral system should be always be…

EK Electrical Oct 2022 (Q10)

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With reference to overload protection for electric motors, describe the principle of operation of EACH of the following types of overload relay: (a) Thermal (3) (b) Magnetic (3) (c) Electronic (4) Oct 2022 (Q10)

EK Electrical Oct 2022 (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) Oct 2022 (Q9)

EK Electrical Jul 2022 (Q11)

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(a) Explain the principle of operation of an insulation resistance test, starting why the test is carried out on regular basis (6) (b) Describe how EACH of the following electrical tests is carried out (2) (i) Resistance (2) (ii) Continuity (2) Jul 2022 (Q11)

EK Electrical Jul 2022 (Q10)

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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) Jul 2022 (Q10)

EK Electrical Jul 2022 (Q9)

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With reference to the paralleling and load sharing of A.C. generators: (a) State the requirements for synchronization; (3) (b) State how KW power is shared; (1) (c) State how Kvar power is shared; (1) (d) List the features that the Automatic Power Management System controls for the operation of main switchboards and generators when the…

EK Electrical Mar 2022 (Q11)

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