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What is the minimum liquid level that should be maintained above the area that is to be hot tapped on a storage tank or vessel?
What is the minimum liquid level that should be maintained above the area that is to be hot tapped on a storage tank or vessel?
A . 1 ft. (300 mm)
B . 2 ft. (600 mm)
C . 3 ft. (900 mm)
D . 4 ft. (1200 mm)
Answer: B
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