S/78 test Latest Version Already Graded A

S/78 test Latest Version Already Graded A The purpose of fire alarms 1.Provide notification 2. Alert occupants 3. Sunmon aid 4. Control fire safety functions Ionization Detector Type of smoke detector that uses a small amount of radioactive material to make the air within a sensing chamber conduct electricity. Photoelectric Detectors Best type of detector for smokey fire by using a beam of light Light Obscurration Detector Uses a beam of light to detect. When the beam is interrupted by smoke particles the sensor trips Light Scattering Detector Uses an indirect beam of light to detect. When smoke comes into contact with beam the light is scattered and redirected to the sensor Multi-criteria Detector This sensor is capable of generating only ONE alarm sigbal fron the sensors either independently or in combination Multi-Sensor Detector This sensor is capable of generating MULTIPLE alarm signals from any of the sensors either independently or in combination Combination Detector A device that responds to more then one of the fire conditions or employs more then one operating system to sense these conditions Addressable Smoke Detector Provides an alarm indication to a control unit and location Intelligent Smoke Detector Provides location of alarm and environmental change information Alarm Verification Used to reduce the number of unwarranted alarm. Cannot delay the alarm longer than 60 seconds A smoke detector may NOT be placed if 1. Temperature is below 32 degrees 2. Temperature is above 100 degrees 3. Relative humidity is above 93% 4. Air velocity is greater then 1.5 m/sec (300ft/min) Spot-Type Detector A type of detection device that