See chapter 11 wet pipe is the sprinkler system type

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See Chapter 11. Wet-pipe is the sprinkler system type in which water is always in the pipe. 190 A water sprinkler system that charges the pipes when it receives a signal from a heat or smoke alarm, and then discharges when a higher temperature is reached, is known as A. Dry-pipe B. Wet-pipe C. Preaction D. Discharge Answer: C See Chapter 11. Preaction, a combination of dry-pipe and wet-pipe, is increasingly popular in data centers because it reduces the likelihood that a water discharge will actually occur @@md and a discharge will be limited to a small area in the data center. 191 Why would a dry-pipe sprinkler be preferred over a wet-pipe sprinkler? See Chapter 11. Dry-pipe systems take a few moments (at least) before water discharge begins. 192 How does water aid in fire suppression?
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See Chapter 11. Water cools the fuel to the point at which the fire can’t continue. Also, to some extent, water can act as a physical barrier in between the fuel and oxygen. 193 Which of the following are NOT fire detectors? See Chapter 11. Dial-up alarms don’t detect fire; they respond to a fire detector and call the fire department by using a telephone line to play a prerecorded message. 194 Which of the following is NOT a physical site security measure? A. Guards B. Fencing C. Warning signs D. CCTV Answer: C See Chapter 11. Signs don’t keep intruders out. 195 What physical control element is most useful in an emergency? A. Security camera B. Security guards C. Guard dogs D. Barricades Answer: B See Chapter 11. Guards are the most effective control element because they exercise judgment and make value decisions. 196 How does CO 2 aid in fire suppression?
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