2-75. Which of the following descriptions identifies
a dry-type sprinkler system?
1. The piping from the outlet side of the main
sprinkler control valve to the sprinkler
heads contains no water in a normal state
2. The piping between the outlet side of the
main sprinkler valve and the sprinkler
heads is charged with fresh water
3. The piping from the outlet side of the main
sprinkler control valve to the sprinkler
heads contains water in a normal state
4. The piping between the outlet side of the
main sprinkler valve and the sprinkler
heads is charged with coolant
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