FPFF Exit Exam • Set 4 Question 27 of 30
In a mixture of flammable vapor and air, if there is too much vapor and not enough oxygen to support combustion, the mixture is technically described as:
✓
Direct Answer
Option A: Too rich
When the vapor concentration in a fuel-air mixture exceeds the Upper Flammable Limit (UFL), the concentration of fuel vapor is too high relative to available oxygen to support combustion, making the mixture 'too rich'.
All Options
A
Too rich
(Correct Answer)
B
Saturated
C
Over concentrated
D
Too lean
Detailed Explanation & Context
When the vapor concentration in a fuel-air mixture exceeds the Upper Flammable Limit (UFL), the concentration of fuel vapor is too high relative to available oxygen to support combustion, making the mixture 'too rich'.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Fire Prevention & Fire Fighting (FPFF).
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