Class 4 (4th Engineer) MEKG 📅 Feb 2026

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)

Reference Answer

### (a) Line Diagram of a Typical Inert Gas System
A line diagram must be sketched showing the flow of inert gas from the boiler uptake to the individual cargo tanks. The following components, as described in detail below, must be clearly labelled:
1. **Boiler Uptake Funnel Valve** (Uptake from Main/Aux Boiler)
2. **Inert Gas Scrubber Tower** (showing sea water inlet/outlet, venturi, spray nozzles, demister)

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