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CHEMCO Exit Exam • Set 12 Question 27 of 30

Which of the following is true about eductors?

✓

Direct Answer

Option C: They sometimes make high vibrations and even lead to pipeline and gauge damage

Eductors, operating on the Venturi principle, can generate significant vibrations and water hammer effects if not properly operated or maintained. Issues like cavitation or incorrect flow rates can lead to excessive stress on pipelines, fittings, and connected gauges, potentially causing damage and operational hazards.

All Options

A
They can be used only when there is a good level of liquid in the tank to be pumped out
B
Sea water can be used as drive and crude oil pumped out from the tanks
C
They sometimes make high vibrations and even lead to pipeline and gauge damage (Correct Answer)
D
A long preparation is required before eductor can be put to use

Detailed Explanation & Context

Eductors, operating on the Venturi principle, can generate significant vibrations and water hammer effects if not properly operated or maintained. Issues like cavitation or incorrect flow rates can lead to excessive stress on pipelines, fittings, and connected gauges, potentially causing damage and operational hazards.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Chemical Tanker Cargo Operations (CHEMCO).

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