Class 4 (4th Engineer) MEKG 📅 Mar 2026

Exam Question

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

\n (a) Discharge end being smaller than the suction end

\n (b) Smaller size of impeller

\n (c) Lack of moving parts

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

Briefly justify your answer.

Reference Answer

### Correct Answer
(c) Lack of moving parts
### Justification
The most fundamental and distinguishing feature of an eductor (or ejector) when compared to other types of pumps (such as centrifugal, reciprocating, or screw pumps) is its complete **lack of moving parts**. This characteristic stems directly from its principle of operation and defines its primary advantages and applications.

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