Comprehensive and Detailed Step-by-Step Explanation:
Quick-Opening Devices:
A quick-opening device is used in dry-pipe sprinkler systems to accelerate the operation of the system and reduce the delay caused by air in the pipes.
Why Dry-Pipe Systems Use It:
Dry-pipe systems are filled with air or nitrogen instead of water. When a sprinkler activates, the air must be released before water can flow.
Quick-opening devices, like accelerators or exhausters, speed up the release of air to minimize response time.
Other Options Explained:
Option B (Wet-pipe system): Always filled with water; no delay or need for quick-opening devices.
Option C (Preaction system): Uses air but often requires detection activation, not quick-opening devices.
Option D (Deluge system): Opens immediately but does not require quick-opening devices as pipes are already open.
Summary:
A dry-pipe system uses a quick-opening device to reduce activation delays caused by air in the pipes.