Fire Investigator - Master for TCFP Full Test Bank TCFP Possible Questions and Answers

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Fire Investigator - Master for TCFP Full Test Bank TCFP Possible Questions and Answers Is NFPA 921 a guide or a standard? ✔✔ It is the Guide for Fire and Explosion Investigations What are th... e 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. What is overcurrent protection? ✔✔ A device that protects the system from excess current. Includes: Circuit breakers Plug fuses Type S fuses Time delay fuses Cartridge fuses What are the colors of residential wires? ✔✔ Hot - black or red Neutral - gray or white Ground - bare or green What are some methods of electrical heat production? ✔✔ Resistance heating Short circuit Ground fault Parting Arc Excessive current What is the difference between and arc and a spark? ✔✔ Sparks are thrown metal particles Arcs are brief discharges of electricity What is arc tracking? ✔✔ Arc following salts, dusts, or liquids along a path. What is arc mapping? ✔✔ Mapping out of electrical damage in a circuit. What is static electricity? ✔✔ A stationary charge caused by movement of one object against another. Lighting is a static disharge. What are the five conditions nessecery for Static Arc Ignition? ✔✔ A Means of static generation A means of accumulating and maintaining the charge A static discharge with sufficient energy A fuel source Coexistence of the arc and fuel source Name two fuel gasses: ✔✔ LP (liquid petroleum) Natural gas What is the difference between tanks and cylinders for LP gas? ✔✔ Tanks: storage with greater than 1000 LBs water capacity. [Show More]

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