AIGF Exit Exam • Set 4 Question 25 of 30
What is oxygen deficient atmosphere?
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Direct Answer
Option B: atmosphere containing less than 21 percent oxygen by volume
An oxygen-deficient atmosphere is defined as any enclosed space with an oxygen content of less than 20.9% (statutory entry danger threshold below 19.5% by volume).
All Options
A
atmosphere containing less than 11 percent oxygen by volume
B
atmosphere containing less than 21 percent oxygen by volume
(Correct Answer)
C
atmosphere containing less than 11 percent oxygen by pressure
D
atmosphere containing less than 21 percent oxygen by pressure
Detailed Explanation & Context
An oxygen-deficient atmosphere is defined as any enclosed space with an oxygen content of less than 20.9% (statutory entry danger threshold below 19.5% by volume).
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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