Exam Question
(a) Control air dryer - working principle with diagram, of any one type of dryer of your choice. (8)
(b) Any two types of Ballast water treatment system. (8)
Class 4 (4th Engineer)
MEKG
📅 Sep 2024
Reference Answer
### (a) Control Air Dryer - Refrigeration Type
#### 1. Purpose
Compressed air used for control and instrumentation systems on board a vessel must be extremely dry. The presence of water vapour can lead to:
* **Corrosion**: Formation of rust and scale within pneumatic pipelines and components.
#### 1. Purpose
Compressed air used for control and instrumentation systems on board a vessel must be extremely dry. The presence of water vapour can lead to:
* **Corrosion**: Formation of rust and scale within pneumatic pipelines and components.
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