OCTCO/OCTF Exit Exam • Set 3 Question 28 of 30
Which of the following methods applies to how a vacuum is created by a jet pump or an eductor?
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Direct Answer
Option C: A rapidly moving stream of fluid passing through a nozzle.
An eductor operates on the Venturi principle: high-velocity driving fluid pumped through a convergent nozzle creates a low-pressure area (vacuum) that entrains suction liquid.
All Options
A
A propeller drawing a fluid through a Venturi nozzle.
B
A reciprocating plunger directly applying force to a fluid.
C
A rapidly moving stream of fluid passing through a nozzle.
(Correct Answer)
D
Centrifugal force converted into potential energy.
Detailed Explanation & Context
An eductor operates on the Venturi principle: high-velocity driving fluid pumped through a convergent nozzle creates a low-pressure area (vacuum) that entrains suction liquid.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Oil and Chemical Tanker Cargo Operations (OCTCO/OCTF).
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