Read the following: 'Positive pressure ventilation (PPV) fans push fresh air into a structure to displace smoke. PPV is most effective when a dedicated exhaust opening is established opposite the fan entry point.' A crew sets up a PPV fan at the front door but does not open a back window. Based on the passage, this setup will likely:
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A
Work perfectly because the fan is positioned correctly
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B
Be less effective because no dedicated exhaust opening is established
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C
Cause a backdraft due to increased oxygen introduction
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D
Remove smoke faster than a setup with an exhaust opening