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Which of the following statements pertaining to air conditioning for an information processing facility is TRUE?
Correct Answer: D
Explanation/Reference: Explanation: The AC units used in an information processing facility must be dedicated and controllable from within the area. They must be on an independent power source from the rest of the room and have a dedicated Emergency Power Off switch. It is positive, not negative pressure that forces smoke and other gases out of the room. Incorrect Answers: A: The AC units must be controllable from inside the area, not outside the area. Therefore, this answer is incorrect. B: The AC units must keep positive pressure in the room, not negative pressure so that smoke and other gases are forced out of the room. Therefore, this answer is incorrect. C: The AC units must be on a different power source as the equipment in the room to allow for easier shutdown. Therefore, this answer is incorrect.