Class 4 (4th Engineer) MEKG 📅 Jul 2025

Exam Question

A distinguishing feature of an eductor, when compared to other pumps, is the (16)

(a) discharge end being smaller than the suction end

(b) small size of impeller

(d) ease at which the wearing rings may be changed

Briefly justify your answer.

Reference Answer

The correct answer is **(c) lack of moving parts**.
### Justification for Full Marks (16/16)
#### 1. Fundamental Principle of Operation
An eductor, also known as a jet pump or ejector, is fundamentally different from conventional centrifugal or positive displacement pumps because it operates on the principles of fluid dynamics, specifically the **Venturi effect**, which is a direct application of **Bernoulli's Principle**.

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