BCOT Week 5 Questions and Answers 2023

BCOT Week 5 Questions and Answers 2023 ______ is the biggest cause of death in a fire Smoke A ______ cannot evacuate inmates until instructed by a supervisor Correctional Officer ____ amount of fire drills per month One Each shift must conduct a fire drill every ______ Quarter Fire Triangle fuel, oxygen, heat Fire Tetrahedron fuel, oxygen, heat, chemical reaction Fire alarm notification system Strobes and horns, pull stations In case of fire sound the alarm must call main control: give your name location of fire type of fire hold phone for verification Fire exit door Color coded disk Color coded key Minimum of ____ fire exits Two: Primary Secondary Fire A rapid chemical combination of fuel and oxygen in the presence of heat and usually accompanied by the production of heat, light, and combustion by products Fire Tetrahedron Chemical chain reaction- in the burning process, fuel elements (compounds) are released by heat produced by the fire. These elements join the fire (combine with oxygen) to produce more heat, which releases more fuel elements Oxygen supports ______ and _______ Combustion and life: 21% in normal air 16% min. needed to support respiration and combustion 15% visible flame goes out 5% fire goes out Fuel has ____ amount of physical states 3: Liquid Gases Solids Liquids gasoline, kerosene, paint thinner ____ produces gases Vaporization Gases natural gas, Lp gas, acetylene - No conversion necessary Solids Wood, rubber, plastic, paper - Converted into gas by pyrolysis ____ and _____ affects ease of ignition and rate of burn Size and Shape 4 classes of fire A - Ordinary combustibles ( wood, paper): Label- Green triangle and trash can on fire B- Liquids Label- Red square and gas can on fire C- Energized electrical Label- Blue circle and plug and socket on fire D - Metals Label- Yellow Star 4 sources of heat energy Chemical , electrical, mechanical, nuclear Heat is _____ for fire to be initiated and combustion to occur Essential Heat transfers in 3 ways Conduction- Through a heat conducting medium EX: pipes, steel roof beams Convection- Through the movement of hot air/liquid EX: usually vertically- heat rise includes direct flame contact Radiation- Movement of heat waves through space until they strike a solid object EX: Similar to the sun, unaffected by wind, goes in all directions Products of combustion flame, heat, smoke, fire gases 4 phases of burning Ignition: Oxygen content high- 21% Temperature elevated- 100 degrees Easy to extinguish Growth: Oxygen content above 15% room temperature up to 1300 degrees fire spreads rapidly flashover possible Fully developed: All combustibles have ignited Temperature over 3000 degrees Large amount of fire gases Decay: Most dangerous Fire running out of fuel and oxygen rate of combustion slowing down high room temperature little to no flame potential for backdraft Flashover when room becomes hot enough to ignite spontaneously in adjacent area Backdraft Smoke explosion: Extremely fast ignition of smoke and combustion products Happens when air is admitted to super heated room with no oxygen occurs during decay phase Indications for backdraft Smoke exiting small openings under pressure black smoke becoming dense gray-yellow color heavily smoke stained windows building may appear to breath ( smoke leaves in puffs) can be prevent by proper ventilation Rollover/flameover fire rises to ceiling, then spreads across Extinguishing methods 1. Reduce temperature- cool with water 2. Remove fuel- turn off valves and remove solid fuel 3. Exclude oxygen- smoother in dirt or foam blanket, flood area with carbon dioxide, use multi-purpose extinguisher 4. break chemical chain reaction- dry chemical fir extinguisher agents Extinguishing agents water- class A fires dry chemical- multipurpose, class A,B, and C fires, excluded oxygen, interrupts chemical chain reaction Class K extinguisher- wet chemical PASS method Pull, Aim, Squeeze, Sweep EBA escape breathing apparatus - 5-7 minutes of air - not used for fighting fires or search and rescue - evacuation only EBA use - remove from case - check tank to ensure its full - place shoulder strap on right shoulder to hang over left side of body - remove the hood from pocket and place over head with air hose in front of your mouth - tighten hood against neck Inspecting extinguishers - should be in its designated place and easily accessible - hose and nozzle damage free - operating instructions legible and in view - pin in place - tamper seal unbroken - fully charged - inspection tag signed every 30 days