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Class 2 (2nd Engineer) MEKG 📅 Feb 2026

Exam Question

(a) Sketch and explain a fully automated air conditioning system for accommodation spaces, annotating the relevant temperatures and relative humidity's throughout the system. (12) (b) Describe how bacteria are prevented from multiplying to a harmful level in an air conditioning system. (4)

Reference Answer

### Part (a): Fully Automated Accommodation Air Conditioning System
A fully automated air conditioning system for ship accommodation is designed to maintain a comfortable and healthy environment by controlling temperature, humidity, air purity, and air movement. The system typically operates on a recirculation basis with a fresh air supplement, utilizing a central Air Handling Unit (AHU) and a chilled water plant.
#### 1. System Components and Operation
The system operates by conditioning a mixture of fresh and recirculated air and distributing it to the various accommodation spaces. The process can be broken down as follows:

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