Question: How does a pressure sandwich work for smoke control? Group of answer choices The fire floor is held neutral and the floors above and below

How does a "pressure sandwich" work for smoke control? Group of answer choices The fire floor is held neutral and the floors above and below are exhausted to remove smoke. The fire floor is exhausted to and floors above and below are pressurized. The fire floor is made positive to drive smoke up a shaft, floors above and below are neutral

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