Firefighter 1 Chapter 4 Test on Fire Dynamics

Fires involve a heat producing chemical reaction between fuel and?

When a substance changes from one type of matter to another, such as two or more substances combining to form compounds, the substance undergoes a?

Which statement about energy and combustion is accurate?

Which element of the fire tetrahedron is included to explain flaming (gas phase) combustion?

What occurs when a mixture of fuel and oxygen encounters an external heat source with sufficient thermal energy to start the combustion reaction?

The minimum temperature at which a fuel in the air must be heated in order to start self-sustained combustion is known as the?

What causes flaming combustion to occur?

What is the cause of most fire deaths?

Which statement about the dangers of products of combustion is accurate?

Which product of combustion acts as a chemical asphyxiant by excluding oxygen from the blood?

Hydrogen cyanide (HCN) is a product of combustion that?

How does a compartment fire affect pressure in and around gases in the compartment?

What is the measurement of the average kinetic energy in the particles of a sample matter?

Which measurement is often used to measure how long PPE will protect a firefighter in an interior fire environment?

What is the most common source of heat in combustion reactions?

What may occur in an oxidation reaction when the heat generated exceeds the heat being lost?

Which type of electrical heating occurs when the current flowing through a conductor exceeds its design limits?

What occurs when a gas is compressed?

The transfer of heat through and between solids is known as?

In the fire environment, convection usually involves the transfer of heat through?

Which heat transfer mechanism is dependent on several factors including turbulence and velocity of moving gases?

By which mechanism of heat transfer does heat travel in a straight line at the speed of light?

Heat that is radiated to the insulating air layer between PPE and your body?

A fuel's chemical content influences its heat release rate and its?

Gaseous fuels can be the most dangerous of all fuel types because they?

What will a liquid with a specific gravity of less than one do when combined with water?

The minimum temperature at which a liquid gives off sufficient vapors to ignite, but not sustain combustion is its?

What may occur if water is added to a burning liquid that is less dense than water?

When solid fuels are heated, they begin to?

Sawdust ignites more easily than a log because the sawdust has a higher?

In most compartment fires, the energy release in fire is directly proportional to the?

Materials that burn at normal oxygen levels will burn more intensely in?

Combustion can occur within a range of concentration of fuel vapor and air; this range is referred to as the?

How does the self-sustained chemical reaction influence the oxidation reaction in flaming combustion?

An extinguishing agent, such as dry chemical or Halon-replacement agent, terminates the combustion reaction by?

Which statement describes the factor that MOST influences compartment fire development?

Fires develop through four stages: incipient, growth, ----- and decay.

During the ----- stage of fire development, the three elements of the fire triangle come together and the combustion process begins.

Which statement describes a fire in the incipient stage?

In a compartment fire, the interface between the hot gas layers and cooler layer of air is commonly referred to as the?

Which type of phenomenon occurs when the fire rapidly transitions from the growth stage to the fully developed stage?

What happens during flashover?

In a compartment fire, smoke flashover indicators include rapidly increasing volume, turbulence, optical density and?

Observed from the exterior, a high neutral plane may indicate that the fire is in the early stages of development, or could indicate?

In a ventilation-limited compartment fire that has a large volume of flammable gases, opening a door or window could result in?

Which is an indicator for potential backdraft?

The ----- stage of fire development occurs when the heat release rate of the fire has reached its peak.

A collapsed storage shed that is fully involved in flames would be an example of?

What is the likely result if additional air is allowed into an already-ventilated compartment fire?

Which action will transition a compartment fire in a modern structure from ventilation-limited to fuel-limited?

A fire is said to be in the ----- stage when it runs out of either available fuel or available oxygen.

To ensure that the decay stage of a ventilation-limited fire is the fire's final stage, firefighters must provide a controlled transition by?

The flow path of a structure fire is comprised of two regions: the ambient air flow in and the?

What factor helps determine the flow path in a structure fire?

What will establish new flow paths between the fire compartment and exterior vents of the building?

Why must firefighters use tactics that control the oxygen available to the fire?

Firefighters working in the exhaust portion of the flow path will?

What will occur if firefighters begin an attack on a ventilation-limited structure fire with ventilation alone?

When a structural member such as a window or roof fails, introducing a new source of oxygen to a fire, ------ ventilation has occurred.

Which statement about ventilation and wind considerations is MOST accurate?

What occurs when a mixture of unburned fuel gases and oxygen come in contact with an ignition source?

Which means of influencing fire dynamics is typically a tactic in wildland fires or liquid and gas fires?

Using extinguishing agents other than water and foam to interrupt the combustion reaction is referred to as?

Temperature reduction refers to using water or foam agent to cool fire gases and hot surfaces for the purpose of extinguishment?

Oxygen exclusion/flow path control involves using door control and tactical ventilation techniques to control the amount of air on the fire?

Most building codes rate construction types according to?

What provides the best indicators of structural integrity?

What is often the most readily available fuel source and significantly influences fire development in a compartment fire?

What is the most effective means of establishing awareness of hazards in commercial, industrial, and storage facilities with large fuel loads?

In addition to structural members, what can be a significant factor influencing fire spread and loss of lives in fires?

A compartment is any?

What construction features tend to contain fires for a longer period of time?

Which statement BEST describes a fire in a large compartment or a compartment with a high ceiling?

Fire spreading from a wall to a nearby couch due to radiant heat transfer is an example of?

Insulation contains heat within the building which causes a localized increase in the temperature and fire growth?

Retention maintains temperature by slowly absorbing and releasing large amounts of heat?

The use of engineered or lightweight construction and trussed support systems pose a danger to firefighters because engineered trusses?

Where might firefighters be MOST likely to encounter inoperative standpipes and sprinkler systems?

Which type of buildings are subject to rapid fire spread because many of the protective features are not in place?