GASCO Exit Exam • Set 3 Question 16 of 30
Fixed gas detection system alarms should be activated when the vapour concentration reaches
✓
Direct Answer
Option B: 5
Fixed gas detection systems on gas tankers are typically set to alarm at 30% LEL in non-enclosed spaces or 5% LEL to 20% LEL depending on zone requirements and sampling configurations.
All Options
A
20
B
5
(Correct Answer)
C
30
D
60
Detailed Explanation & Context
Fixed gas detection systems on gas tankers are typically set to alarm at 30% LEL in non-enclosed spaces or 5% LEL to 20% LEL depending on zone requirements and sampling configurations.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Liquefied Gas Tanker Cargo Operations (GASCO).
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