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Q2. a) Sketch a water-tight door and frame showing manner of attachment to bulkhead and the additional reinforcement carried by the bulkhead to compensate for the aperture. (6)

b) Explain how water-tightness of the door and frame mating surface is ensured with a hydrostatic pressure tending to force the faces apart. (5)

(c) Describe the means of remote closing operation of the door and state how many closing stations there are and their position. (5)

Q2. a) What is the purpose of water tight doors fitted on bulkheads? (4)

b) Name the locations of water tight door in a vessel. (4)

c) Sketch and describe a vertically mounted water tight door. (8)

Q4. (a) Sketch a water-tight door and frame showing manner of attachment to bulkhead and the additional reinforcement carried by the bulkhead to compensate for the aperture (8)

(b) Explain how watertightness of the door and frame mating surface is ensured with an hydrostatic pressure tending to force the laces apart. (4)

(c) Describe the means of remote closing operation of the door and state how many closing stations there are and their position. (4) DONE

Q4. Sketch a water-tight door and frame showing manner of attachment to bulkhead and the additional reinforcement carried by the bulkhead to compensate for the aperture (16)