BIGF Exit Exam • Set 3 Question 4 of 30
______________ is the process in which vapour boil- off from acrgo tanks is condensed in a cargo condenser in which the coolant is a refrigerant gas such as R 22.
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Direct Answer
Option B: Cascade Reliquefaction Cycle
n-Butane has an atmospheric boiling point of -0.5°C, while isobutane boils at -11.7°C; both produce dense vapors heavier than air.
All Options
A
Boil-off
B
Cascade Reliquefaction Cycle
(Correct Answer)
C
BLEVE
D
Boiling Point
Detailed Explanation & Context
n-Butane has an atmospheric boiling point of -0.5°C, while isobutane boils at -11.7°C; both produce dense vapors heavier than air.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Basic Training for Ships subject to the IGF Code (BIGF).
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