Summary Essay Example | Topics and Well Written Essays - 250 words - 175

Summary - Essay ExampleIonization uses two radioactive plates that can produce either a nix or positive charge. The device is designed to decrease in current flow once the smoke enters the chamber and causes an interruption in the positive or negative charges of the device. The radioactive material that the air comes into contact with causes the air to become a conductor. This system works on a totally different basis from the photoelectrical smoke detection. As the name connotes, the photoelectric system works by sensing the environmental light that enters the detection chamber. The light that enters the system is scattered and triggers the affright sensor to emit a warning sound in the room. While the light obscuring type creates a less intense type of light as it detects the smoke in order to sound the alarm. Owing to this comparison, I believe that the photoelectric technology is most trustworthy since I understand how light works. I know nothing about radioactive materials and would not be comfortable around that technology. I find it dangerous and would not risk exposing my family to its well know dangers.The NFPA 72 dictates that in residential occupancies, fire alarm boxes should be no further than five feet from the nearest exist and be only between 42 -48 inches from the floor. Both sides of the exists should have existing fire alarms in an open space of approximately forty feet in width. The distance between the alarms should not be more than 200 feet from each other when installed in big rooms or hallways. For visibility the fire alarm bells should be red except in instances when the ring itself is painted red. In such instances, the alarm bell should be painted silver.Just like with anything that must be installed, one must consider the of necessity of the environment before a smoke detector is installed. For example, in a tall, multi floor room, a beam smoke detector