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AIGF Exit Exam • Set 5 Question 18 of 30

What is superheated vapour?

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Direct Answer

Option D: Vapour removed from contact with its liquid and heated beyond its boiling temperature

Superheated vapour occurs when a substance is heated beyond its saturation temperature while isolated from its liquid phase. In cryogenic fuel systems, preventing superheating is crucial to maintaining the liquid state of LNG. Understanding thermodynamic states is essential for managing fuel pressure and temperature during bunkering and transfer operations.

All Options

A
The density of a gas or vapour inder specified conditions of temperature and pressure
B
detecting heat of gases or vapours
C
phenomenon generated in a pipeline system where there is a change in the heat of liquid in the line
D
Vapour removed from contact with its liquid and heated beyond its boiling temperature (Correct Answer)

Detailed Explanation & Context

Superheated vapour occurs when a substance is heated beyond its saturation temperature while isolated from its liquid phase. In cryogenic fuel systems, preventing superheating is crucial to maintaining the liquid state of LNG. Understanding thermodynamic states is essential for managing fuel pressure and temperature during bunkering and transfer operations.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Ships subject to the IGF Code (AIGF).

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