Class 4 (4th Engineer) MEKG 📅 Apr 2023

Exam Question

(i) What is an 'eductor'? State it's function. (4)

(ii) Explain the working principle of an eductor, explain in slight detail. (6)

(iii) Draw an eductor and name it's parts. Show how it is connected to a tank 'stripping' arrangement. (6)

Reference Answer

### (i) Eductor Definition and Function
**Definition:**
An eductor is a type of static jet pump with no moving parts. It operates based on the **Venturi effect**, which is a direct application of Bernoulli's principle. It utilizes a high-velocity jet of a primary fluid, known as the 'motive fluid' (e.g., seawater, fire main water), to create a low-pressure zone (vacuum) that entrains and pumps a secondary fluid, known as the 'suction fluid' (e.g., bilge water, ballast water, gas).
**Function:**

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