CHEMCO Exit Exam • Set 5 Question 10 of 30
The explosive range of petroleum vapors mixed with air is
✓
Direct Answer
Option B: 1% to 10%
The explosive range of petroleum vapors mixed with air, also known as the flammable or explosive limits, is typically between 1% and 10% by volume. Below 1% is too lean, and above 10% is too rich to ignite, as per ISGOTT.
All Options
A
0% to 1%
B
1% to 10%
(Correct Answer)
C
10% to 15%
D
12% to 20%
Detailed Explanation & Context
The explosive range of petroleum vapors mixed with air, also known as the flammable or explosive limits, is typically between 1% and 10% by volume. Below 1% is too lean, and above 10% is too rich to ignite, as per ISGOTT.
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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