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Q9. A. With reference to the insulation testing of marine electrical plant: - I. State the reasons for insulation testing; II. State the precautions to be observed when testing intrinsically safe equipment. B. Describe the overhaul of d.c. motor which has been subjected to excessively damp condition or flooding with seawater.

Q8. Explain in detail how you would isolate one of sprinkler system for routine maintenance. Describe all tests and inspections you would make and how you would return the system to service.