IAAI CFI Study QUESTIONS WITH COMPLETE 100% VERIFIED SOLUTIONS 2024/2025, Exams of Physics

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IAAI CFI Study QUESTIONS WITH COMPLETE 100% VERIFIED SOLUTIONS 2024/2025 Combustible Liquid A liquid with a flash point ABOVE 100F 12.5 If the current flowing out from an electrical panel is 12.5 amps, and it then flows through an electrical load of 1500 watts, what is the amperage of the remaining current flow of the return circuit? 1000 If a hair dryer draws 8.3amps (in a home with 120-volt service), what is the wattage? *Power (P) = current (I) x voltage (V) Watts = amps x volts 1987 The year of the first edition of NFPA 1033 1.5 times The recommended distance for securing the perimeter of a blast scene *That is, the distance from the furthest debris 1100°F What temperature in the upper gas layer causes the onset of Flashover? 1960°F The temperature at which copper melts 2 W/cm2 The measurement of the radiant heat flux (from gas layer to the floor) that indicates the onset of flashover 240 volts The voltage between the two hot wires at the service entrance cables in most single-family residences in the United States (single-phase service with three wires) 3 years The revision cycle for NFPA 921 (timespan) 350°F The flash point of power steering fluid 35-70 p.s.i. In high-pressure fuel-injected vehicles, this is the typical range of pressure that is used to pump fuel from a fuel tank 5 and 17 The lower explosive and upper explosive limit of natural gas (methane)? 680°F The ignition temperature of power steering fluid Fuel Any substance that can undergo combustion Act or Omission Two factors or situations leading to a fire that may show the nature of the incident responsibility. Additional Investigative Recommendations This concept should not be included in a summary report of findings. Admiralty Law A law that may govern the fire investigation of a boat After-market Equipment A type of device in a vehicle, which can cause an electrical overload to factory installed wiring Alive and Breathing Evidence of smoke or soot in the lungs, bronchi, and trachea is one of the most significant factors in confirming that, at the time of the fire, the victim was WHAT? All Team Members Those who have the responsibility for monitoring safety conditions at the fire or explosion scene 1220°F The melting temperature of aluminum Aluminum-to-pavement sparks Which one of these is NOT considered a competent ignition source? Metal-to-metal sparks, Aluminum-to-pavement sparks, Metal-to-pavement sparks, Motor bearing sparks Heat Release Rate A meaningful analysis of a fire requires an understanding of the fire growth, the total heat released, and WHAT? Arc-fault circuit interrupter What does he term AFCI stand for? And, the "A" specifically represents what? ASTM Overheating on a circuit is most likely to occur at this location on a circuit Joint Investigation Consensus agreement between interested parties should be developed prior to the commencement of WHAT? Crazing Complicated patterns in glass Crime Scenes A type of scene or circumstances, in which fires do NOT always destroy all physical evidence Current (amperage) A factor in OHM's law that can be calculated if you know resistance and voltage Deductive Reasoning The reasoning in the scientific method used to test an hypothesis Deductive Reasoning The reasoning process of moving from generalizations to particular assertion (*"Reduce to Deduce" *Test hypothesis ("deduce") *Test based on known facts *More confident assertion than induction) Demonstrative Evidence Type of evidence consisting of tangible items *as opposed to Testimonial Evidence or Documentary (written) Evidence Depth of Char A burn pattern analysis that is MORE useful for evaluating fire spread, rather than length or intensity of burning Differential All voltages are _________________, which means that a battery or DC generator creates a potential difference that can force charge through a wire Diffusion Flame Burning The ordinary sustained burning mode in most fires Document and Carefully Move By taking these two steps, an investigator can obtain the manufacturer's name, model & serial numbers, manufacture date, and any warnings on an appliance, determined to be in the area of fire origin Documentary Evidence What type of evidence is an investigator's report? Documentation A key method used by investigators when an appliance is determined to be in the area of origin, particularly the positioning of all controls and components. DOT Standards The standards that gas cylinders must conform to (Dept. of Transportation) Dual Element Fuses Types of fuses that have one element for overloads and another element for short circuits Dust Explosion A particular type of an explosion that does NOT often result in pronounced seats of explosion Dust Explosion An explosion that most often occurs in confined areas of relatively wide dispersal, where combustible dust can accumulate in sufficient quantity to support a propagating reaction. Engine Oil Analysis This analysis may be performed to determine the pre-fire condition of the engine and to establish possible motive for the destruction of the vehicle. Evidence The fire scene itself needs to be considered as WHAT? Evidence Collection The process of photographing an item, then collecting, tagging and putting it in a log Evidence Collection and Documentation The importance of this fire investigative practice is no different in wildfire investigations, compared to structural fires. Evidence Custodian The person at a fire scene who manages various aspects of the evidence collection process, including an evidence log and evidence bagging, tagging, preservation and storage Exigent Circumstances The justification used to enter a property in order to extinguish a fire Final Hypothesis Also known as "Conclusions" Fire Death Team A team comprised of a homicide detective, medical examiner, and fire investigator Fire Dynamics Analysis A type of analysis used to predict fire phenomena and characteristics of the environment Fire Effects Observable or measurable changes in or on a material as the result of a fire Fire Growth Rate Once a fuel is ignited in a motor vehicle, any additional fuels contained in the vehicle have significant effect on WHAT fire factor? Fire Intensity In a wildland fire, this fire characterisic is indicated by the degree of damage to the wildland fuel Fire Origin This investigative determination is based on witness information, fire patterns, arc mapping, and fire dynamics Fire Scene Access The fifth and sixth amendments DO NOT answer questions regarding constitutional protections in relation to WHAT fire investigation aspect? (4th amendment issue) Fire Scene Reconstruction Recreating pre-fire positions of contents Fire-rated Door This type of door must be used when installed in a fire-rated wall. First or Second Degree Burns This is the typical extent of thermal injuries sustained from an explosion flame front, due to the very short duration. Flame Spread Rating A system used to rate a material's flame spread potential. *And these are the categories: Class A: Flame spread index 0-25 Class B: Flame spread index 26-75 Class C: Flame spread index 76-200 Flammable Gases This type of fuel can only be ignited by a spark or pilot flame over specific ranges of gas concentration Flammable Liquid A liquid with a flash point below 100*F Flash point The characteristic of an appropriate mixture of vapor-to-air, which will cause it to ignite when subjected to an ignition source Flash Point A specific fuel characteristic, which will have little or no significance when the fuel is released in a spray form. Flashover The minimum temperature needed to heat a fuel so as to ignite and begin self-sustained combustion Incandescent Light Bulbs An item that tends to "pull" toward the heat source (*if over 25 watts) Incendiary Fire A category of fire that is strongly indicated by the confirmation of multiple fires Incendiary Fire A category of fire that is associated with multiple fires and trailers Incident Scene Commander This person can grant permission for a fire investigator to enter a scene before the fire is completely extinguished Inductive Reasoning The reasoning process of moving from specific observation to broader generalizations (*Induction is to "increase" *Develop hypothesis ("induce") *More uncertain than deduction *Based on empirical data, training, and experience) Interested Party Any person, entity, or organization with obligations or whose rights or interest might be affected by the investigation of a specific incident Interviews (1) Trust, (2) Caution, and (3) Distrust are three types of what? Inverted Cone Pattern This fire pattern is often caused by a natural gas leak Inverted Cone Patterns Fire patterns commonly created when a vertical flame plume does not reach the ceiling Team Leader Committee In what group is one representative selected from each investigative party? Irregular Pattern A certain pattern that is not necessarily an indicator of the presence of an ignitable liquid Job Performance Requirement A professional description that (1) describes the specific job task, (2) lists items necessary to complete the task, and (3) describes measurable outcomes and evaluations for the task Joint Investigations These can occur simultaneously and involve separate and independent examinations through which each party may develop an independent hypothesis Kerosene Which of these fuels has the lowest ignition temperature: kerosene, gasoline, methane, or propane? Kinetic Energy The type of energy that is converted suddenly from potential energy during an explosion, with the production and release of gases under pressure. Laboratory Analysis This entity must confirm any sample obtained by canine alert, to be considered valid Lack of Stability One of the most dangerous situations an investigator may encounter when examining a boat afloat after a fire Laminated Wood This material is NOT acceptable to be used on the exterior (but is acceptable for the interior). Latent Heat of Vaporization The amount of heat absorbed by a substance during its change from a liquid to vapor Lightning Static electricity flowing from cloud to ground or from cloud to cloud Lightning One form of static electricity Cloud-to-Cloud The lightning occurrence that is less likely to cause a fire (compared to cloud-to-ground) Lines of Demarcation Borders of fire patterns Low-Order Damage Type of explosion damage that heaves or pushes Melt and Fuse Together Lengthwise Fire often causes standard copper conductors to do WHAT? Movement and Intensity The two basic types of fire patterns Neutral Plane The term associated with the air and gas flow in a compartment fire Neutral Position The position on a receptacle, where the cord's wider prong is forced to plug into, due to a change that was made to 20-amp cords in 1987 NFPA 1033 The national applicable performance standards for fire investigators NFPA 54 NFPA standard that prohibits gas piping in air ducts, clothes chutes, and elevator shafts NFPA 704 The NFPA standard for hazard identification NFPA 704 NFPA hazard placard: red TOP (flammability) yellow RIGHT (instability) blue LEFT (health) white BOTTOM (special/specific) *(0 minimal to 4 severe hazard) NFPA 921 Not every portion of WHAT document is essential to every fire or explosion incident NFPA website To submit a proposal to the NFPA 921 Committee, forms are available from the _____________________. Noncombustible Type of construction principally used in industrial type buildings Nondisclosure Agreement This protects confidential, trade secret, and propriety information in a fire investigation Occupant Access During a major investigation involving multiple tenants, this should NOT be allowed until after the entire area has been examined and safety concerns have been addressed Exterior Walls The primary difference between Ordinary and Frame constructions involves mostly the construction of WHAT? Outside Screw and Yoke One type of valve commonly used to control water flow to fire sprinkler system *which is open when the position of the stem is up Overcurrent The electrical compromise between an energized wire and a ground wire Overhaul The process of extinguishing hotspots and searching for hidden fires, after suppression efforts Oxidation A chemical reaction that combines a substance with oxygen A process whereby a material undergoes a chemical reaction and increases in temperature solely due to exothermic reactions between the material and the surrounding atmosphere Sequential Photographs Type of photography that is helpful in understanding the relationship of a small subject to its relative position in a larger area Serial Fire-Setting Geographic area, clusters, temporal frequency, and materials and methods are useful in identifying and establishing this act Simple Sketch At a minimum, this investigative practice should be done on all fire scenes Fire Size and Duration Determining which pattern was produced at the point of origin becomes more difficult as WHAT increases? Sleeving The softening and loosening of the wire's thermoplastic insulation due to heating (fire) Sloping Sides Whether a hole burned into a horizontal surface was created from above or below may be identified by examining WHAT? Smoldering This type of fire normally produces char that results from thermal decomposition Societal-motivated Arson A subcategory of revenge/retaliation that is generally not satisfied with a single fire Solo Fire scene examinations should NOT be conducted in WHAT MANNER? Spalling Damage and fire patterns occurring to concrete that is NOT a positive indicator of a liquid accelerant Specific Gravity The ratio of the density of a substance to the density of a standard (usually water for a liquid or solid, and air for a gas) Specific Gravity of Air The ratio of the average molecular weight of a gas or vapor to the average molecular weight of air Specific Gravity of a liquid or solid The ratio of the mass of a given volume of a substance to the mass of an equal volume of water (at a temp. of 4C) Speed of Fire Growth This fire characteristic is NOT indicated by the angle of the borders of the V pattern Spoliation This concept does NOT mean that an item of evidence cannot be removed from the fire scene in order to preserve it or protect it from theft, for instance. Spontaneous Combustion What fire process is vehicle motor oil NOT prone to undergo Spontaneous Combustion A phenomenon that does NOT occur to human bodies (not supported by evidence) Spontaneous Heating The process whereby a material increases in temperature without drawing heat from its surroundings Sprinkler Head Combustible materials should be kept 18 inches away from this fire protection device Stoichiometric Ratio The optimum fuel/air mixture where combustion is most efficient Surface Orientation This is the difference between wildfire V- patterns and compartment fire V-patterns Sweating Heaters located just under the interior faces of a refrigerators keep this from occurring Thermal Cutoff TCO stands for this, and "T" in particular Thermal Cutoff A component in heat-producing appliances, which operates by melting of an internal pellet when the appliance overheats, which turns off the unit Thermal Inertia The property of a material that characterize its rate of surface temperature rise when exposed to heat Thermal Inertia Thermal conductivity, density, and heat capacity are the three components of WHAT? Thermal Protector A specific type of protective device that motors are generally equipped with in a counter-top appliance, which may reset when the motor cools Toxic Gases More people are killed by this in a fire incident, not necessarily by the flames of fire Trailers Fire patterns that indicate a deliberate attempt to distribute fire from one location to another Trained Personnel An investigator should notify this person(s) upon finding an incendiary device that has not activated Transformer A mechanism used to reduce voltages from the normal 120 V and to isolate the rest of an appliance from the supply circuit Transmission The type of pipeline used to convey natural gas from the storage or production facilities to local utilities Turbocharger The hottest point of an engine, which uses exhaust gases for propulsion Type 1 Construction The noncombustible construction type, made of steel and concrete with fire resistance Type 2 Construction The noncombustible construction type, made of steel and concrete; but with little to no fire resistance Type 3 Construction The Ordinary construction type, with masonry or noncombustible exterior walls Type 4 Construction Heavy timber or mill construction type Type 5 Construction Wood framed construction type Upper Explosive Limit Which will create more damage in an explosion: the Upper or Lower Explosive Limit? U.S. Coast Guard The entity, where an investigator can obtain recall information regarding fire causes in boats and the manufacturer, model, and year Utilities An immediate concern to the fire investigator is the status of the structure's WHAT? Ventilation Conditions This is a key consideration of the fire's characteristics, when conducting a fire test or fire model, in order to validate the test Ventilation-Controlled Fire Fire in which the heat release rate or growth is controlled by the amount of air available to the fire Ventilation Opening This firefighting tactic made directly above the fire will help localize the fire Ventilation-Controlled Fire A type of fire that produces more carbon monoxide and more soot than fuel-controlled fires ((not sure which is hotter, but probably peak fuel-controlled, imo)) Violent Explosions Fuel-air mixtures at or near the lower explosive limit (LEL) do NOT always produce less ___________________ than those fuel-air mixtures at or near the upper explosive limit (UEL). Weatherhead A specific device on a structure that is associated with electricity and is part of the electrical system