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Class 4 (4th Engineer) MEKG 📅 Oct 2025

Exam Question

(a) Sketch a line diagram showing a typical 'Inert Gas System' used for inerting the cargo tanks of oil tankers, labeling 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) Line Diagram of an Inert Gas (IG) System
A line diagram is required to be sketched by the candidate. The sketch should clearly illustrate the flow of gas from the boiler uptake to the cargo tanks and atmosphere, labeling all the key components as listed below.
### (b) Description of the Inert Gas System
#### 1. Purpose and Principle

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