TCFP Fire Investigator Quiz Bank with 100% correct solutions | Latest 2023/2024 - Guaranteed success

TCFP Fire Investigator Quiz Bank with 100% correct solutions | Latest 2023/2024 - Guaranteed success Is NFPA 921 a guide or a standard? -- It is the Guide for Fire and Explosion Investigations What are the six steps of the scientific method? -- Recognize the need Define the problem Collect the data Analyze the data Develop a hypothesis Test the hypothesis What step of the scientific method is inductive reasoning? -- Analyze the data What step of the scientific method is deductive reasoning? -- Test the hypothesis What are the four parts of the fire tetrahedron? -- Fuel (reducing agent) Heat Oxidizing agent Uninhibited chemical chain reaction What kind of reaction absorbs energy, an endothermic or an exothermic reaction? -- Endothermic What is heat transfer by direct contact called? -- Conduction What is heat transfer by gas flow / air movement called? -- Convection What is heat transfer by microwave energy called? -- Radiation What is a fuel controlled fire? -- A fire that is limited by the amount of combustibles. What is a ventilation controlled fire? -- A fire that is limited by the amount of oxygen. What are the stages of fire growth? -- Ignition Growth Flashover Fully Developed Decay What is a flashover? -- The transition phase from growth to fully developed, where all surfaces reach ignition temperature almost simultaneously. What is ignition of the underside of the hot gas layer called? -- Flameover or rollover What factors influence flashover conditions? -- Size of the compartment Height of ceiling Ventilation Amount of fuel Layout of fuel Location of fire in the compartment What are fire patterns? -- The physical manifestation of the affects of fire on materials. What are the different types of fire patterns on the walls and ceiling? -- Plume Generated patterns (often V shaped) Ventilation generated patterns Hot gas layer patterns (Line of demarcation) What is spalling? -- The separation of chunks of concrete with explosive force caused by the expansion of water (moisture) trapped in the concrete as it turns to steam What is char? -- Pyrolized carbonaceous material What is oxidation? -- Physical change in appearance of a material resulting from the combination of oxygen. What is alloying? -- Mixing two metals heated then cooled to change their properties. Often melts at a lower temperature. What is a clean burn? -- When there was enough heat to burn away all carbon deposits (soot) on a surface leaving a "clean" surface. Occurs on non-combustible surfaces. What is soot? -- Elemental carbon produced during incomplete combustion. What is calcination? -- When chemically bound water is driven out of gypsum walls by the heat of the fire. Does a 25 Watt light bulb expand towards the fire or pull inward away from it? -- Bulbs 25 watts or less pull away. Bulbs greater than 25 watts will expand towards the fire. What causes heat shadowing? -- An object blocking the travel of radiated heat. What is a dead load? -- The weight of things attached to the building, like flooring, cloumns, and roof coverings. What is a live load? -- A load that can move, like people, furniture, wind, water, and snow. What is compartmentation? -- Design features of a building that limit fire growth to the room of origin. What are the five building construction types? -- Type I - Fire resistant Type II - Non combustible Type III - Ordinary Type IV - Heavy timber Type V - Wood frame What is ordinary construction? -- Exterior walls are masonry and frame is wood. What is wood frame construction? -- Lightweight wood construction, used in apartments, houses. What is platform frame construction? -- Each floor is a seperate platform. What is balloon frame construction? -- The wall studs extend from the foundation to the roof. What is Ohm's Law? -- V=IR (E = I x R) What is voltage? -- Pressure What is current? -- Flow What is resistance? -- Friction, opposition to the flow What is an overload? -- Power needs exceed the circuit's capacity. Alternating Current VS Direct Current -- Alternating current - the electrons flow out from the source and then back to it, alternating directions. Direct current - electrons flow one way. Single Phase service -- Residential. Three conductors: Two insulated conductors at 120 V each, and a bare ground wire. Three phase system -- Commercial. Four conductors: Three insulated conductors (480, 240, or 208 V), and a bare ground wire. What is the difference between grounding and bonding? -- Grounding connects the system to the earth (ground). Bonding connects to systems together so the charge stays the same between them