Class 4 (4th Engineer) MEKG 📅 Nov 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) Watertight Door, Frame, and Bulkhead Reinforcement
A watertight door assembly is a critical component for maintaining a vessel's subdivision and damage stability. Its attachment to the bulkhead and the reinforcement of the bulkhead aperture are governed by strict classification society rules to ensure structural integrity.
**1. Sketch Description:**
The sketch would show a cross-section of a vertically or horizontally sliding watertight door mounted on a transverse bulkhead.

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