Q6. (a) List FIVE protective devices fitted to a main electrical switchboard (10)
(b) Explain the meaning of the term Earth Fault and state why it is undesirable in electrical installations. (6)
Q9. Explain the meaning and purpose of EACH of the following ship terms:
(a) Transverse watertight bulkhead (4)
(b) Bilge keel (4)
(c) Shear strake (4)
(d) Cofferdam (4)
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