Chapter Pretests

Please read each question and select your answer from the choices provided. You must complete all of the questions in order to view your results. At the end of each exam, you have the option to e-mail your results to your instructor.

1:  What is the material contained in a fire extinguisher that will stop the combustion process?
A: Desiccant
B: Extinguishing agent
C: Propellant
D: Reducing agent

2:  What would be an example of an incipient fire?
A: A fire in a wastebasket
B: A small car fully involved
C: A fire confined to the attic and roof of a residence
D: A house fire that has self-vented

3:  What danger is there in using water on a Class C fire?
A: There is risk of electrocution to fire fighters
B: Many metals explode when energized and contacted by water
C: Water can react with the chemicals and cause them to spread.
D: These types of fires appear to go out but do not cool and almost always re-ignite.

4:  How many classes of fire are there?
A: Five
B: Four
C: Three
D: Two

5:  What is one way water works to put out a fire?
A: It coats the fuel with nitrogen
B: It floods the fire with hydrogen
C: It cuts off the nitrogen to the fire
D: It cools the fuel below its ignition point

6:  What is the primary disadvantage of fire extinguishers?
A: They are "one-shot" devices
B: They require more people to operate effectively
C: They do far more collateral damage than a simple hose line
D: They do nothing to suppress re-ignition

7:  Why should water not be used on a Class K grease fire?
A: It does no harm, but neither does it do any good
B: It causes a volcanic eruption of the grease, and the fire will spread.
C: It produces a sub-surface steam wave which extinguishes the fire neatly
D: It causes the grease to congeal, turning it into a class C fire

8:  Can electricity generate heat?
A: Yes, sometimes tremendous amounts that will ignite nearby flammables
B: Enough to burn the skin, but not enough to ignite paper
C: Enough to feel warm, but not enough to burn the skin
D: No actual heat at all, though it feels like it when shocked

9:  What may happen if water is used on a fire involving a combustible metal?
A: The fire goes out immediately, but evolves hydrogen chromate, a poisonous gas
B: Nothing changes and the fire keeps burning
C: The fuel turns to powder but keeps burning
D: A violent reaction may occur

10:  How large can portable fire extinguishers be?
A: Up to a pound
B: Up to fifteen pounds
C: Up to one hundred pounds
D: Up to several hundred pounds

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