Deck : Safety - 3180/2841
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| Large volumes of carbon dioxide are safe and effective for fighting fires in enclosed spaces, such as in a pump room, provided that the __________. |
| A) persons in the space wear damp cloths over their mouths and nostrils |
| B) ventilation system is kept operating |
| C) persons in the space wear gas masks |
| D) ventilation system is secured and all persons leave the space |
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