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CHEMCO Exit Exam • Set 10 Question 5 of 30

What is pressure surge ?

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Direct Answer

Option D: A sudden increase in the pressure of the liquid in a pipeline brought about by an abrupt change in flow rate

Pressure surge, or "water hammer," is a rapid and significant increase in liquid pressure within a pipeline caused by sudden changes in flow rate, such as valve closure or pump stoppage. ISGOTT highlights the dangers of pressure surges, which can lead to pipeline and equipment damage if not managed.

All Options

A
When the pressure of oil increases suddenly at the manifold
B
When the pressure of oil decreases suddenly at the manifold
C
When the discharge pressure at the pump drops to zero
D
A sudden increase in the pressure of the liquid in a pipeline brought about by an abrupt change in flow rate (Correct Answer)

Detailed Explanation & Context

Pressure surge, or "water hammer," is a rapid and significant increase in liquid pressure within a pipeline caused by sudden changes in flow rate, such as valve closure or pump stoppage. ISGOTT highlights the dangers of pressure surges, which can lead to pipeline and equipment damage if not managed.

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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