True/False
Indicate whether the sentence or statement is true
or false.
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1.
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A
method of diversion is to dig a trench alongside the waterway to collect the spilled material off the
top of the water.
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2.
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When
digging retention areas, you should be aware of underground utilities.
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3.
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The
shutting off of valves is usually a tactic used by first responders. On some tank trucks and fixed
facilities there are remote shutoffs.
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4.
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A
catalytic bead is a crystal-filled tube that changes colors in the presence of the intended
gases.
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Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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5.
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During a product control operations, firefighters discover that the spilled product is
floating on top of the body of water. What type of dam will they need to create to control the spread
of the product? a. | an overflow
dam | d. | a retention
dam | b. | an absorption
dam | e. | a diverting
dam | c. | an underflow
dam | | | | |
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6.
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Multigas detectors sample for oxygen levels, a lower explosive limit (LEL), and two to
three toxic gases, usually ____ and hydrogen sulfide. a. | carbon
dioxide | d. | carbon
monoxide | b. | vesicants | e. | hydrocarbons | c. | sulfur | | | | |
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7.
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An
oxygen concentration of lower than ____ is considered oxygen deficient and a health
risk. a. | 15% | d. | 19.5% | b. | 16.5% | e. | 20.9% | c. | 18% | | | | |
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8.
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An
oxygen concentration of more than ____ is considered to be a fire risk. a. | 18% | d. | 21.4% | b. | 19.5% | e. | 23.5% | c. | 20.9% | | | | |
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9.
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Carbon monoxide is acutely toxic at high levels, typically at levels in excess of
____. a. | 50
ppm | d. | 200
ppm | b. | 75
ppm | e. | 500
ppm | c. | 100
ppm | | | | |
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10.
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Normal air contains 20.9 % oxygen. Below ____ is considered oxygen deficient and above
____ is considered a fire risk. a. | 18%, 22% | c. | 10.5 %, 25.5% | b. | 18.5%,
24.5% | d. | 19.5%,
23.5% | | | | |
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