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Class 4 (4th Engineer) MEKG 📅 Apr 2024

Exam Question

(a) Sketch a line diagram showing a typical 'Inert Gas System' used for inerting the cargo tanks of oil tankers, labelling the component parts (6)

(b) Describe the system (8)

(c) State what oxygen content you would expect in the flue gases if good combustion is achieved (2)

Reference Answer

### (a) Sketch of a Typical Inert Gas System
A line diagram showing the typical arrangement of an Inert Gas (IG) System utilizing boiler flue gas is required. The sketch must clearly label the following principal components in the correct sequence:
1. **Boiler Uptake and Isolating Valves**: Source of flue gas.
2. **Scrubber Tower**: Including seawater inlet/outlet, spray nozzles, packing material/trays, and a demister at the outlet.

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