Class 4 (4th Engineer) MEKG 📅 Jul 2024

Exam Question

(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 water-tightness of the door and frame mating surface is ensured with an hydrostatic pressure tending to force the faces 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)

Reference Answer

### (a) Sketch of a Water-Tight Door and Frame Showing Manner of Attachment to Bulkhead and Additional Reinforcement
**Concept:**
A watertight door is a critical safety appliance on a ship designed to prevent the ingress and spread of water between compartments, thereby maintaining the vessel's buoyancy and stability in the event of damage or flooding. Its design must ensure effective sealing under hydrostatic pressure and maintain the structural integrity of the bulkhead it penetrates.
**Construction of a Typical Watertight Door and Frame:**

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