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Arelin Arelin
wrote...
Posts: 757
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6 years ago
When work is being conducted inside tanks or confined spaces in which inert gas has been used for purging, requirements must include ________________ to help ensure a safe environment.
 
  a. proper rigging
  b. continuous ventilation
  c. proper footing
  d. oxygen levels below 19
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wrote...
6 years ago
b
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