
OCTE SAFEdoc
FAB
CONTAINERS AND WELDING TEST
1. If it is not known what substance a container has held, what should you assume?
2. Name four substances whose dusts are flammable.
3. What gas may be produced when an acid reacts with a metal container?
4. Name three methods of cleaning a container.
5. Name the five major steps that must be taken before welding or cutting on a container.
6. How does purging a vessel differ from cleaning?
7. What does it mean to "isolate" a container?
8. At the same voltages, why is ac more dangerous than dc?
FAB SAFEdoc Page 56
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