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Exam CFPS Topic 2 Question 139 Discussion

Actual exam question for NFPA's CFPS exam
Question #: 139
Topic #: 2
The removal of flammable vapors by displacement for cleaning a storage tank can be accomplished by displacement with air, inert gas and

Suggested Answer: B Vote an answer

The removal of flammable vapors by displacement for cleaning a storage tank can be accomplished by displacement with air, inert gas, and water. Water is a common method of displacing flammable vapors from tanks, as it is readily available, inexpensive, and non-reactive with most fuels. Water can be sprayed into the tank to create a water seal that prevents the vapors from escaping and reduces the oxygen concentration in the tank. Water can also be used to rinse the tank walls and remove any residual fuel. However, water displacement may not be suitable for some tanks that contain water-sensitive or water-soluble fuels, or for tanks that have limited drainage or disposal facilities.

by Jeremy at Dec 22, 2025, 10:27 AM

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Here are all the actual test exam dumps for IT exams. Most people prepare for the actual exams with our test dumps to pass their exams. So it's critical to choose and actual test pdf to succeed.

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