LGTCO/LGTF Exit Exam • Set 4 Question 6 of 30
What is Flammable Range?
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Direct Answer
Option B: The range of hydrocarbon vapor concentration in air between the LFL and UFL capable of burning
The flammable range is the intermediate concentration span of flammable gas mixed with air (between Lower and Upper Flammable Limits) within which combustion can occur if ignited.
All Options
A
A mixture of flammable gas in air whose gas percentage is above the UFL
B
The range of hydrocarbon vapor concentration in air between the LFL and UFL capable of burning
(Correct Answer)
C
A mixture of flammable gas in air whose gas percentage is below the LFL
D
A gas mixture whose concentration is strictly between 0% and 10% LFL
Detailed Explanation & Context
The flammable range is the intermediate concentration span of flammable gas mixed with air (between Lower and Upper Flammable Limits) within which combustion can occur if ignited.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Liquefied Gas Tanker Cargo Operations (LGTCO/LGTF).
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