IT 451 - Final Study Guide

IT 451 - Final Study Guide - 1. Conventional vs....

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1. Conventional vs. addressable fire alarm system A conventional system is one that uses detectors and manual stations that transmit an alarm signal only – when in standby or quiescent state, they do not transmit (1121) An addressable fire alarm system is one that uses addressable fire detection devices, both automatic and manual – identical to conventional detectors except they are equipped with electronic circuitry – each detector a separate zone – continuously polled from the control panel (1124). 2. Ionization fire protection system operates on what system? Ionization-type detectors contain a small amount of radioactive material that serves to ionize the air between two charged surfaces, causing current to flow, combustion particles reduce current flow causing alarm to go off (1126). 3. National Life Safety Code - NFPA 101 and National Electric Code - NFPA 70 authors NFPA – National Fire Protection Association (1116) 4. Three minimum parts of a fire alarm system 1) signal initiation 2) signal processing 3) alarm indication (1116) 5. Portable extinguishers – what purpose they serve? Classifications? Different Categories whos responsible for regulation Purpose is to extinguish fires in buildings at an early stage. (1110) Classifications: Class 1A to 40A – ordinary combustibles, Class 5B to 40B – flammable or combustible liquids Class C – live electrical equipment Class A:B: C – multipurpose Class D – combustible metals 6. Fire extinguisher regulations NFPA 10 – Standard for Portable Fire Extinguishers (1110) - “Class” of fire they are designed to fight - How many extinguishers are required - Where they are located depending on hazard of occupancy 7. Halon – legal/illegal? What are advantages? Identified as threat to ozone in 1994 – phased out of production (1108) Advantages (1107): - Can be released with relative safety in a flooding system in areas such as computer rooms - Quickly extinguishes fire with little harm to the contents of the room - No oxygen displacement to threaten life support - Little demonstrated harm to people - No residue left on electronic components - Lightweight, space-saving relative to other fire suppressants 8. Conventional automatic sprinkler system operates on what transmission pipes? Single riser (bulk main) with main line (cross main) and branch lines (1100) 9. Standpipes and hoses – classified according to what? Classified by whether system is for first-aid or full-scale fire fighting and whether the system has an automatic water supply or a manual one (1085).
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Three classes: - Class I – full-scale fire fighting – for use by trained fire fighters - Class II – first-aid fire fighting before fire trucks arrive – can be difficult to operate by building occupants
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This note was uploaded on 04/03/2008 for the course IT 451 taught by Professor Staff during the Spring '06 term at Cal Poly.

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IT 451 - Final Study Guide - 1. Conventional vs....

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