Which of the following statements about a hazardous materials state
of matter is MOST accurate? (137)
A. In general, liquids have the greatest mobility.
B. A gas may change to a liquid if the temperature increases.
C. The ERG provides isolation distances only for materials in
gaseous form.
D. The behavior of different states of matter can determine what
exposures are affected D
Incidents involving _____ are potentially the most dangerous for
emergency responders. (140)
A.
solids
B. gases
C. liquids
D. frozen substances B
Which of the following statements about gases is MOST accurate?
(140)
A. Gases do not present a breathing/inhalation hazard.
B. It is quite easy to contain
gases for mitigation purposes.
C. It is easiest and safest to detect gases by sense of smell.
D. Gases have an undefined shape and keep expanding if
uncontained D
What BEST describes compressed gas? (140)
A. Gas
that has expanded upon release and escaped mitigation
B. Confined gas that at normal temperatures exists in both liquid
and gaseous states
C. Any gas that is kept at pressures and/or temperatures higher
than ambient conditions
D. Gas that, at normal temperature, exists solely as a gas when
pressurized in a container D
The conversion of a liquid to vapor: (142)
A. makes it easier to detect.
B. makes it easier to contain.
C. increases the material’s mobility.
D. decreases the material’s mobility C
Which of the following statements about solids is MOST accurate?
(143)
A. The process of sublimation is rapid and violent.
B. The particle size of solids may influence their behavior.
C. Solids tend to be very mobile unless acted upon by exterior
forces.
D. Unlike liquids and vaporous liquids, solids do not have inhalation
hazards B
What is the unit most typically used to express particle size? (144)
A. Bar
B. Inch
C. Micron
D. Centimeter C
Sublimation occurs when a material transitions directly from a: (144)
A. solid to a gas.
B. gas to a solid.
C. gas to a liquid.
D. solid to a liquid A
What is the pressure exerted by a saturated vapor above its own
liquid in a closed container? (145)
A. Vapor density
B. Specific gravity
C. Vapor pressure
D. Solubility/miscibility C
Materials with a vapor pressure over _____ mmHg will be gases
under normal conditions. (145)
A. 7
B. 76
C. 760
D. 7600 C
Liquid changes
to a gas at the _____ point. (146)
A. flash
B. boiling
C. freezing
D. sublimation B
A boiling liquid expanding vapor explosion (BLEVE) is caused by:
(147)
A. sublimation of a boiling liquid.
B. application
of a pressure stream.
C. a heated liquid or gas expanding.
D. inadequate internal vessel pressure C
Gases with a vapor density of _____ will rise quickly and spread to a
wide geographical area. (148)
A. one
B.
less than one
C. more than one
D. one through five B
Where are you MOST likely to find gases or vapors with vapor
density greater than one? (149)
A. Attics
B. Trenches
C. Near the ceiling
D. Flat open
spaces B
Partially water-soluble chemicals will penetrate into the lower
respiratory system and cause: (149)
A. sudden gastrointestinal distress.
B. itching, scratching, and bloody skin lesions.
C. immediate
symptoms such as coughing and throat irritations.
D. delayed symptoms that include pulmonary edema and coughing
up blood
D
Most flammable liquids will float on water because they have: (151)
A. high solubility.
B.
high miscibility.
C. specific gravities less than one.
D. specific gravities greater than one
C
Viscosity determines the ease with which a product will flow and is
greatly affected by: (152)
A. sublimation.
B.
temperature.
C. specific gravity.
D. appearance and odor
B
The concentration (in air) at which the “average person” can smell a
particular compound is the: (154)
A. solubility.
B. vapor density.
C. odor
threshold.
D. vapor pressure
C
The way a substance behaves and interacts at the molecular level
are: (154)
A. physical properties.
B. chemical properties.
C. biological properties.
D. radiologic properties
B
Flash point, autoignition temperature, and flammable range are
properties related to a material’s: (154)
A. reactivity.
B. corrosivity.
C. flammability.
D. radioactivity
C
The temperature at which a liquid or volatile substance gives off
enough vapors to support continuous burning is its: (154)
A. fire point.
B. flash point.
C. flammable range.
D. autoignition temperature
A
Flammable gases have: (154)
A. no flash point.
B. higher fire points.
C. very low flash points.
D. no autoignition temperature
A
The lowest concentration (or lowest percentage of the substance in
the air) that will produce a flash of fire when an ignition source is
present is the: (156)
A. LLL (lower liability limit).
B. LFL (lower flammable limit).
C. UEL (upper explosive limit).
D. UFL (upper flammable limit)
B
A fuel that has moved beyond its upper flammable limit will: (156)
A. be too rich to burn.
B. flash if exposed to an ignition source.
C. immediately reach its autoignition temperature.
D. reach the correct ratio of fuel
to oxygen to sustain combustion
A
The chemical property used to describe substances that destroy
living tissue is: (157)
A. reactivity.
B. corrosivity.
C. flammability.
D. radioactivity
B
What type of materials break down fatty skin tissues and can
penetrate deeply into the body? (157)
A. Acids
B. Bases
C. Gases
D. Vapors
B
The reactivity triangle has three components: an oxidizing agent, a
reducing agent, and a(an): (159)
A. solubility.
B. flash point.
C. reactivity point.
D. activation energy