________ fires consist of flammable liquids and gases such as gasoline, oil, and methane.

Which method of extinguishment interrupts the combustion reaction and stops flame production?

An inspector's responsibilities include checking the installation and maintenance of standpipes and hose systems which:

________ fires consist of combustible metals such as aluminum and magnesium.

Which of the following tasks that an inspector is responsible for enables a system to cool a fire and interrupt its chemical chain reaction?

During what stage is the fire releasing the maximum amount of heat possible for the available fuel and oxygen?

Which stage occurs when the oxygen concentration falls to the point that flaming combustion is diminished?

The most common source of heat in combustion reactions is:

Which of the following is one of the most common methods of fire control and extinguishment and works by reducing temperature?

Materials that absorb heat, but do not contribute fuel in the combustible reaction are known as:

Which type of heat transfer travels through vacuums and air spaces?

What occurs as solid fuels are heated and begin to decompose and give off combustible vapors?

Which process usually involves the transfer of heat through the movement of hot smoke and fire gases?

Vapor density is defined as the weight of ________ as compared to the weights of an equal volume of ________.

Electricity generated when two conductors are separated from one another creating a gap best defines:

Which of the following exists in many forms including chemical, mechanical, and electrical?

Which type of heat transfer occurs when a material is heated as a result of direct contact with a heat source?

Fire point is the temperature required to:

Which of the following occurs when burning is localized on or near the fuel's surface, where it is in contact with oxygen?

Example: charcoal

A fire in the presence of a higher than normal concentration of oxygen will:

When water is converted to steam at 212°F (100°C), it expands approximately:

Which of the following thermal properties of a compartment maintains temperature by absorbing and releasing large amounts of heat slowly?

Which type of fire would not be easily extinguished by chemical flame inhibition?

The oldest and simplest model used to describe fire behavior is known as the:

Which type of ignition occurs without any external flame or spark?

The ratio of the weight of a liquid to an equal volume of water is:

________ fires consist of ordinary combustibles such as wood, cloth, and paper.

When a fuel gives off enough vapors so that is can be ignited and burn momentarily, it has reached its:

All other factors being equal, a fire in a large compartment will develop:

All other factors being equal, a fire in a small compartment will develop:

Which method of extinguishment may separate fuels from oxygen by blanketing them with foam?

What physical state must fuel be in for flaming combustion to occur?

The principle which most closely describes how water extinguishes fire is:

When fire influences the environment and it begins to be influenced by the ventilation, it is in the ________ fire stage.

What is a substance that oxidizes another substance and it can cause other materials to combust more readily or make fires burn stronger?

• What kind of change occurs when a substance remains chemically the same but changes in size, shape, or appearance?

What is an example of a slow form of oxidation?

What is an example of a rapid form of oxidation?

What is stored energy possessed by an object that can be released in the future to perform work once released?

Fire is an ________ chemical reaction involving combustion.

The only difference between the fire triangle and the fire tetrahedron is the ________ reaction.

What is a visible, luminous body of a burning gas emitting radiant energy, including light of various colors produced by burning gases or vapors during combustion process?

Which one is NOT an energy form?

What is the transferring of energy from a high-temperature substance to a low-temperature substance?

True or false:

Pyrolysis happens to a liquid or gas.

What is a mix of fuel and oxygen encounter an external heat source with sufficient heat or thermal energy to start combustion?

The autoignition temperature of a substance is always ______ than its piloted ignition temperature.

What is a form of oxidation and exothermic chemical reaction that increases without the production of thermal heat?

What type of energy is generated by friction (rubbing) or compression (squeezing)?

What is it called when a current flowing through a conductor exceeds its design limits and it may overheat and present an ignition hazard?

What is a hot air balloon an example of?

Which fire stage has the fastest change in temperature?

How do you extinguish a Class C fire?

•  Which is NOT a passive agent?

• If the specific gravity of a flammable liquid is less than one, it will ________.

  • Example: gasoline

• • If the specific gravity of a flammable liquid is more than one, it will ________.

  • Example: saltwater

Flooding an area with an inert gas or blanketing it with foam is an example of:

True or false:

The use of water is the most effective method available for extinguishing smoldering fires.

Firefighters influence fire behavior in the following ways:

(select all that apply)

What is the minimum at which a liquid gives off sufficient vapors to ignite but not sustain combustion?

Which class of fire has aluminum and magnesium and cannot be extinguished with water?

The type of fuel involved in combustion affects the _______________.

While the heat from a fire is a danger, anyone directly exposed to _______ causes the largest percentage of fire deaths.

Oxygen in the air is the primary agent in most fires. Air has _____% oxygen.

As the surface-to-mass ratio increases, the _____ energy is required for ignition.

Example: sawdust

As the surface-to-mass ratio decreases, the _____ energy is required for ignition.

Example: fire log

What is the measure of the average kinetic energy is motion, expressed in terms of units or degrees?

What is a chemical reaction that absorbs thermal energy or heat?

Example: having a popsicle in the middle of summer

Which type of electrical energy happens when electric current flows through a conductor, heat is produced?

Example: a lightbulb

• What type of electrical energy happens when the the current flowing through a conductor exceeds its design limits, it may overheat and present an ignition hazard?

• It also has unintended resistance heating.

Insulating materials delay the transfer of heat primarily by _______ conduction.

Example: Drywall or gypsum

 Which is NOT a hydrocarbon reducing agent?

What are examples of cellulose-based fuels?

Select all that apply.

The fuel in a combustion reaction is known as as the ___________.

The heat release rate (HRR) is the energy per unit of time as fuel burns is expressed in _______ or _______.

Place the Heat Release Rate units in order of smallest to greatest:

________ describes the extent to which a substance will mix with water.

Select the hydrocarbon fuels that are lighter than water and do not mix with water.

Select all that apply.

Select the polar solvent that will readily mix with water.

True or false:

Combustible materials with high surface-to-mass ratios are much more easily ignited and will burn more quickly than the same substance with less surface area.

When the fire is located low in the building, such as as in the basement or on the first flor, convected currents when cause ________ extension through stairways.

When fires originate on upper levels, they generally extend ________ much more slowly by following the fuel path or as a result of structural collapse.

The rapid transition from the growth stage to the fully developed stage is known as the __________.

The interface of the hot and cooler gas layers in a fire is known as the __________.

Which thermal layer has the coldest temperatures?

Which thermal layer has the hottest gases?

Which kind of fire involve household appliances, computers, transformers, electric motors, and overhead transmission lines and must be de-energized before extinguishing efforts begin?

What is it called when agents turn fats and oils into a soapy foam that extinguishes fire?

Hint: Used in Class K fires

The __________ is the concentration above which a combustion cannot take place.

It is too rich to burn.

The ___________ is the minimum concentration of fuel vapor and air that supports combustion. It is too lean to burn.

1. In a fully developed stage, what does the fire look like? 

The total quantity of combustible contents of a building, space, or fire area is known as the ______.

_______________ increases fire spread through the transfer of radiant heat from wall surfaces to adjacent fuel sources.

The fuel in a combustion reaction is known as the ______. They help fires burn.

These fuels can be divided into hydrocarbon-based and cellulose-based.