Deck : Expired / Safety - 725/267
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| Large volumes of carbon dioxide are safe and effective for fighting fires in enclosed spaces, such as in a pumproom, provided that the __________. |
| A) persons in the space wear gas masks |
| B) ventilation system is secured and all persons leave the space |
| C) ventilation system is kept operating |
| D) persons in the space wear damp cloths over their mouths and nostrils |
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