TASCO Exit Exam • Set 1 Question 28 of 30
What factor mainly affects Vapour cloud dilution rate?
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Direct Answer
Option A: Weather conditions
Weather conditions, specifically wind speed and direction, are the primary drivers for vapor cloud dispersion and dilution. They dictate how quickly a released gas plume is mixed with fresh air, reducing its concentration below the LFL.
All Options
A
Weather conditions
(Correct Answer)
B
Quantity of Spill
C
Thermal inversion
D
Diameter of the vapour cloud
Detailed Explanation & Context
Weather conditions, specifically wind speed and direction, are the primary drivers for vapor cloud dispersion and dilution. They dictate how quickly a released gas plume is mixed with fresh air, reducing its concentration below the LFL.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Oil Tanker Cargo Operations (TASCO).
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