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1

True/False
Indicate whether the sentence or statement is true or false.
 

 1. 

The definition of a British Thermal Unit (BTU) is a measurement of heat that describes the amount of heat required to raise 1 liter of water 1° F.
 

 2. 

Matter is defined as “something that occupies and can be perceived by one or more senses.”
 

 3. 

A Class C fire without power is considered a Class A fire
 

 4. 

A thermal plume is a column of heat rising from a heat source. A fully formed plume will resemble a mushroom as the upper level of the heat plume cools.
 

 5. 

Flashpoint is the temperature at which a liquid will liberate a flammable gas.
 

 6. 

Layering is the configuration of heat with the higher temperatures at the upper levels and cooler at lower levels.
 

 7. 

Volume is the mass per unit volume of a substance under specified conditions of pressure and temperature.
 

 8. 

Organic is a substance derived from living organisms.
 

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 9. 

____ is a rapid, persistent chemical change that releases heat and light and is accompanied by flame.
a.
Oxidizing
d.
Combustion
b.
Thermal conductivity
e.
Thermal balance
c.
Oxygenation
 

 10. 

What are the four essential ingredients for fire?
a.
oxygen, fuel, heat, and chemical reaction
b.
oxygen, hydrogen, heat, and fuel
c.
fuel, heat, chemical reaction, and flame
d.
oxygen, combustion, heat, and chemical reaction
e.
none of the above
 

 11. 

Atoms are made of smaller particles called ____.
a.
compounds, electrons, and protons
d.
molecules, protons, and neutrons
b.
electrons, compounds, and neutrons
e.
electrons, molecules, and neutrons
c.
electrons, protons, and neutrons
 

 12. 

A chemical reaction that absorbs heat is a(n) ____.
a.
inorganic reaction
d.
endothermic reaction
b.
exothermic reaction
e.
organic reaction
c.
hydrocarbon reaction
 

 13. 

A chemical reaction that releases heat is a(n) ____.
a.
inorganic reaction
d.
endothermic reaction
b.
exothermic reaction
e.
organic reaction
c.
hydrocarbon reaction
 

 14. 

A(n) ____ permits the flow of electrons from one place to another.
a.
hydrocarbon
d.
electrical conductor
b.
negative charge
e.
oxidizer
c.
positive charge
 

 15. 

A fire involving wood, paper, and plastic is a Class ____ fire.
a.
A
d.
D
b.
B
e.
none of the above
c.
C
 

 16. 

A BLEVE occurs when the ____ inside a closed container increases to the point where the container fails.
a.
vapor density
d.
explosive limits
b.
vapor pressure
e.
flammable limits
c.
ignition
 

 17. 

In oxidizing reactions, such as combustion, ____ is the reducing agent which loses electrons in the chemical reaction.
a.
fuel
d.
energy
b.
oxygen
e.
smoke
c.
heat
 

 18. 

In an atmosphere where oxygen is less than ____ percent, there is not enough oxygen to support combustion.
a.
12
d.
21
b.
14
e.
23
c.
20
 

 19. 

If a particular size nozzle requires a water flow of 250 gallons per minute to be effective, a pumper could feed water to ____ of these hoses.
a.
5
c.
4
b.
3
d.
2
 

 20. 

The state of conversion from a liquid to a gas under normal atmospheric conditions is called ____.
a.
evaporation
c.
boiling point
b.
sublimation
d.
ambient point
 

 21. 

The four stages of fire are ____.
a.
ignition, growth, fully developed, and decay
b.
ignition, flashover, free burning, and smoldering
c.
start, burn, fully developed, and decay
d.
ignition, free burning, smoldering, and decay
 

 22. 

When a hot object transfers its heat, ____ has taken place.
a.
convection
c.
conduction
b.
radiation
d.
nuclear
 

 23. 

Air that is ____ than its surroundings rises. Air that is ____ than its surroundings sinks.
a.
lighter, wetter
c.
hotter, cooler
b.
denser, lighter
d.
cooler, hotter
 

 24. 

This is a condition in which the heat , smoke, and fire gases have reached the uppermost level in a compartment and, instead of continuing up, begin to push down from the ceiling toward the floor.
a.
flashover
c.
rollover
b.
bank down
d.
diffusion
 

 25. 

This is the concentration level of a substance at which it will burn.
a.
flammable load
c.
flammable range
b.
flammable limit
d.
flammable point
 



 
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