19. What forms the connection between zones in a two zone fire model? The fire The ceiling The hot smoke layer The mid-point on the compartment wall 20. When inputting data into a zone fire model, how is the fire typically described? fuel load per square foot of the compartment. temperature increase in the compartment. thermal density of the available fuel. heat or energy release rate. 21. The energy output of a fire is described as the:? fuel load temperature heat release rate thermal conductivity 22. A zone model provides estimates of key conditions in each layer defined by the user as a function of: fuel consumption. energy release. temperature. time. 23. In order for a fire to grow the reaction occurring between the fuel, heat and oxidizing agent must continue. This process is called? Fire growth Heat release rate Fuel-controlled fire Uninhibited chemical chain reaction 24. In fire investigation testing a hypothesis is a form of: inductive reasoning. engineering analysis. deductive reasoning. data analysis. 25. What information should the fire investigator collect at the scene in order to determine the ventilation factor for a compartment fire? Ceiling height Height and area of openings Volume of the compartment Location of the fire in the compartment