NAFI CFEI Exam 2023 with Complete Solutions

true - ANSWER-Probable cause is not needed to obtain an administrative search warrant. a.True b.False conduction - ANSWER-Heat transfer to another body or within a body by direct contact is called: a.Conduction. b.Convection. c.Radiation. d.Pyrolysis. true - ANSWER-Fuses and circuit breakers provide protection against electrical short circuits, ground/earth faults,and load currents that might be damaging (i.e. overloads) to the building electrical system.Properly functioning circuit protection may allow the elimination of the buildings wiring system as a potential cause of the fire. a.True b.False false - ANSWER-In pre-flashover conditions the primary heat transfer mechanism for fire spread through a compartment is radiation. a.True b.False false - ANSWER-In a compartment, flashover occurs because convective heat energy raises combustible to their auto-ignition temperature. a.True b.False true - ANSWER-Combustion may continue with available oxygen concentrations lower than 1 percent. a.True b.False true - ANSWER-The way structures react in a fire often influence how the fire grows and spreads as well as how theymaintain their structural integrity during the fire. Therefore, the fire investigator should considerthe type of structure and method of construction when completing the analysis of fire growth and spread as a part of their fire investigation. a.True b.False false - ANSWER-Materials which have been properly treated with flame-retardants will not undergo pyrolysis andfor this reason will not ignite. a.True b.False empirical - ANSWER-Data that is based on observation or experience and can be verified is called: a.Anecdotal data b.Empirical data c.Qualitative data d.Categorical data true - ANSWER-Inductive reasoning is when all available empirical data is analyzed using the investigator's experience, training, knowledge and expertise. a.True b.False deductive reasoning - ANSWER-Testing of a hypothesis by comparing the investigators hypothesis to all known facts is using____________ reasoning. a.Deductive b.Inductive c.Both A and B d.Neither A or B all of the above - ANSWER-Which of the following can be defined as a fuel gas? a.Natural gas b.Liquefied petroleum gas c.Manufactured gases d. all of the above all of the above - ANSWER-Prior to conducting an on scene investigation many things should be identified, including: a.Date and time of incident b.Size and complexity of the incident c.Purpose of the investigation d.All of the above true - ANSWER-Luminescent flame temperatures are dependant on the fuel to oxygen ratio. a.True b.False timeline - ANSWER-The investigative tool used to graphically or in a narrative manner depict events relating to a fire or explosion in chronological order is called: a.Timeline b.Systems analysis c.Fault tree d.Computer modeling Fault tree - ANSWER-A diagram that places, in a logical sequence, the conditions and chains of events that are necessaryfor a fire or explosion to occur is called: a.Timeline b.Systems analysis c.Fault tree d.Computer modeling true - ANSWER-Protected areas result from an object or item prohibiting the products of combustion from depositingon materials which the object protects. a.True b.False backdraft - ANSWER-A deflagration resulting from the sudden introduction of air into a confined space containing oxygendeficient products of incomplete combustion. a.Flashover b.Flameover c.Smoke Explosion d.Backdraft the geometric shape of the pattern - ANSWER-What does the "V" in V-pattern represent? a.Vector - pattern b.Virtual - pattern c.The geometric shape of the pattern d.Represents the name of the first individual who recognized the pattern There is a gasoline pattern found on the premises - ANSWER-Which of the following is NOT one of the three elements of arson? a.There has been burning of property b.The burning is incendiary in origin c.The burning is shown to be started with malice with the intent of destroying property d.There is a gasoline can found on the premises false - ANSWER-A BLEVE is a type of explosion involving the ignition of a dispersed vapor cloud? a.True b.False true - ANSWER-Adequate debris removal is essential in an origin investigation?