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| 1. |
explain the working of automatic fire alarm |
| Answer» <p>There are two types of smoke detectors. These are the optical detector and the ionization detector. The optical smoke detector detects smoke by using light sensors (infrared LED). When smoke particles pass through the chamber of the optical detector, it scatters light that triggers the alarm. In the ionization detector, if the smoke particle enters the chamber of the ionization detector it will reduce air ionization inside the chamber of the ionization detector and triggers the alarm.</p> <p>given a simple logic it is good but so long and hard to learn and it is for the big std not for small std</p> <p>wait we will provide you in simple way after editing it.</p> <p>OK</p> <p>In fire alarm there is a wire of low melting point which melts in heat. Then in response a gong attached to it with a mechanism of electronic bell rang. In mechanical fire alarm system, when the hook pilled there is a liver which pushes down and allow the bell to ring.</p> | |