Class 4 (4th Engineer) SC&S 📅 Apr 2023

Exam Question

(a) With reference to refrigerated hold spaces describe using simple sketches: (8)

(i) A tween deck scupper;

(ii) An insulated brine pipe passing through a watertight bulkhead;

(b) With reference to draining water from decks, describe using simple sketches (8)

(i) A scupper pipe leading from the waterway in the tween decks to the outside of the vessel

(ii) A bulwark freeing port with the flap hinged at the top and opening outward

Reference Answer

### (a) Refrigerated Hold Spaces
#### (i) A Tween Deck Scupper in a Refrigerated Hold
**Concept and Purpose:**
The primary purpose of a scupper in a refrigerated tween deck is to drain defrost water or cleaning water without compromising the thermal integrity of the insulated space. A standard scupper leading directly overboard would create a significant heat bridge, leading to energy loss and potential cargo damage. This specialized design prevents heat ingress, maintains the low temperature, and stops odours or gases from entering the space from the bilge or drain system.

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