Question 19 of 30
What is purging?
A
The introduction of inert gas into a tank already in the inert condition to further reduce the existing oxygen content or hydrocarbon gas content to a level below which combustion cannot take place if air is introduced
B
Introducing of oxygen into a tank to a high level
C
Using blowers to push oxygen into a tank
D
Using natural ventilation to gas free a tank
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Answer & Explanation
The correct answer is Option A: The introduction of inert gas into a tank already in the inert condition to further reduce the existing oxygen content or hydrocarbon gas content to a level below which combustion cannot take place if air is introduced.
Purging is the process of displacing an existing tank atmosphere (usually hydrocarbon gas) with inert gas to further reduce the oxygen concentration, ensuring that any subsequent introduction of air will not create a flammable mixture.