Class 4 (4th Engineer) SC&S 📅 Apr 2025

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 with Reinforcement
**Concept and Design:**
A water-tight door is a critical safety appliance on board a vessel, designed to prevent the ingress of water into adjacent compartments, thus maintaining the ship's buoyancy, stability, and integrity in the event of hull damage or flooding. It must be robustly constructed to withstand significant hydrostatic pressures.
**Construction Details:**

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