Fire alarm system with smoke detectors - has parallel contacts in closed loop and series failure contacts operating when alarm failsThe fire alarm system has smoke detector contacts coupled in parallel into the system loop line and failure contacts coupled in series into the loop between the ...
Asmoke detector(sometimes called a "smoke alarm") is a safety device that detects airbornesmokeand issues an audible alarm, thereby alerting nearby people to the danger offire. Most smoke detectors work either by optical detection or by ionization, but some of them use both detection methods to...
故选B。] 答案B 解析 细节理解题。由文章第二段第二句“Most are also equipped with automatic fire alarm systems consisting of heat detectors,smoke detectors and sprinklers”可知,自动火灾警报系统包括热量探测器、烟雾探测器和喷水灭火装置,和B项意思一致,故选B项。
Types of Smoke Detectors Battery Smoke Detector Operating Current Monitoring Status≤8ua, Alarm Status≤20mA Protection Class IP20 Smoke Alarm Sensity 3.60.18 to 0.26 dBm Materials and Colors 3.8ABS, White Certification TUV Operating Voltage 3VDC(with Battery...
What do the automatic fire alarm systems include? A. Pipes and smoke detectors. B. Sprinklers and fire alarm pull stations. C. Fire alarm pull stations and pipes. D. Smoke detectors and sprinklers. 相关知识点: 试题来源: 解析 D 反馈 收藏 ...
Duct Smoke Detectors and Dedicated Function Fire Alarm Systems Definitions:Building Fire Alarm SystemsVS.Dedicated Function Fire Alarm Systems Building Fire Alarm System:NFPA 72 2022 3.3.118.4.1= “A protected premises fire alarm system that includes any of the features identified in 23.3.3.1 and th...
31 Useful Rhetorical Devices Using Bullet Points ( • ) 'Gray' vs. 'Grey': What is the difference? What's the difference between 'fascism' and 'socialism'? More Commonly Misspelled Words Popular in Wordplay See All Terroir, Oenophile, & Magnum: Ten Words About Wine ...
Smart smoke detectors connect to the internet to relay alerts to your smartphone, or automatically turn on your smart lights. Here are the best.
Fire Alarm Control Panel Smart Home Conventional Fire Detectors Stand-alone Fire Detectors Addressable Fire Detectors Flame Detector Carbon monoxide detector Combustible Gas Detectors Z-wave sensor PIR motion sensor Fire Detector Wired Reccessed Magnetic Contacts ...
Fire Detector Wired Reccessed Magnetic Contacts More Find Similar Products By Category Supplier Homepage Products Conventional Fire Detectors Smoke&Heat Detector Fire Alarm Combine Smoke and Heat Detector SD119 UL/En54 Related Categories Alarm Host Alarm & Security System Accessories...