Exam Question
(a) Sketch a transverse section through a duct keel labeling its component parts. Indicate the duct keels position in the ship structure (8)
(b) Explain why duct keels are fitted (8)
Class 4 (4th Engineer)
SC&S
📅 Mar 2023
Reference Answer
### (a) Transverse Section of a Duct Keel
A transverse section through a ship's double bottom at the centerline, showing a duct keel, would include the following labeled components. The duct keel is an integral part of the ship's hull structure, forming a box-like tunnel within the double bottom, extending longitudinally along the ship's centerline, typically from the engine room forward bulkhead to the collision bulkhead.
**Components to be Labeled on the Sketch:**
1. **Keel Plate:** The bottom-most plate forming the base of the ship's structure and the bottom of the duct keel.
A transverse section through a ship's double bottom at the centerline, showing a duct keel, would include the following labeled components. The duct keel is an integral part of the ship's hull structure, forming a box-like tunnel within the double bottom, extending longitudinally along the ship's centerline, typically from the engine room forward bulkhead to the collision bulkhead.
**Components to be Labeled on the Sketch:**
1. **Keel Plate:** The bottom-most plate forming the base of the ship's structure and the bottom of the duct keel.
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