Class 4 (4th Engineer) MEKG 📅 Apr 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) Smaller size of impeller

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

Briefly justify your answer.

Reference Answer

The correct option is **(c) Lack of moving parts**.
### Justification for the Correct Answer (c)
A distinguishing feature is a fundamental characteristic that sets an object or system apart from others in its class. For pumps, the primary distinction of an eductor is its complete absence of mechanical moving components, which is unique when compared to centrifugal, reciprocating, screw, or gear pumps.
1. **Operating Principle (Venturi Effect)**:

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