It is law for there to be fire sprinkler or suppression systems in buildings. Which type of fire sprinkler has pipes that hold pressurized air in the pipes and does not release until an actual fire is detected?
Explanation
Answer: B - Dry pipe systems are fire sprinklers that have pipes that hold pressurized air and do not release until an actual fire is detected. In a dry pipe system, the water is not held in the pipes, but in a “holding tank” until it is released. The pipes hold pressurized air, which is reduced when a fire or smoke alarm is activated, allowing the water valve to be opened by the water pressure. Water is not allowed into the pipes that feed the sprinklers until an actual fire is detected. First, a heat or smoke sensor is activated; then, the water fills the pipes leading to the sprinkler heads. Once the alarm sounds and electric power is disconnected, water flows from the sprinklers. In cold climates, these pipes are best because they do not freeze.
