Answer:
B
Explanation:
Dry pipe system
Dry pipe sprinkler systems as the name implies are not filled with water, These sprinkler systems are intended for applications where the ambient temperature cannot be kept at a minimum of 40°F at all times. Dry pipe sprinkler systems can be commonly found in areas prone to freezing, such as the following:
Unheated warehouses
Commercial freezers
Unconditioned attics
Water-sensitive storage areas
The main advantages of dry pipe sprinkler systems are
ADVANTAGES
1) They are good for industrial and commercial spaces where piping is exposed to freezing temperatures.
2) The system iwill not rust since there is no water inside the pipes under normal conditions.
3) Sine it does not use water in the piping, surface condensation and dripping are less likely. This is a key advantage in areas where water-sensitive materials are stored.