Actual Complete Real Exam Questions And Correct Answers
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UEL (Upper Explosive Limit) - ANSWER-Maximum
concentration that will
propagate
flame.
Acid, Caustic - ANSWER-May cause the pressure within a
container to rise,
especially if the container becomes
contaminated
Acids - ANSWER-Acids have a pH of 7 and below. They are able
to dissolve metals and react severely with strong bases. Strong
acids have a pH equal to or less than 2.0
Air Reactivity - ANSWER-Pyromorphic materials that can
ignite if they are
exposed to air and have the potential for container
failure due to over-
pressurization
Aromatic Hydrocarbons - ANSWER-Materials that contain the
benzene ring,
,which is formed by six carbon atoms and contains
double bonds
Autorefrigeration - ANSWER-A process where an
unintentional and /or
uncontrolled phase change of a hydrocarbon from a liquid to
a vapor occurs,
resulting in a very rapid chilling of the liquid containing local
equipment/or piping
Bases - ANSWER-Bases, or alkalines, have a pH value above 7
and react severely with strong acids. Strong bases have a pH
value equal to or greater than 12.
Biological Agents and Toxins - ANSWER-These irritating agents
are also known
as riot control agents or tear gas. They are generally
nonlethal, but under
certain conditions could cause
asphyxiation.
Boiling Point - ANSWER-The temperature of a substance when
vapor pressure
exceeds atmospheric pressure and the liquid turns into a gas
at the surface.
Catalyst - ANSWER-Used to control the rate of chemical
reaction by either speeding it up or slowing it down. If used
improperly, it can speed up a reaction and cause failure of a
,container that cannot withstand either the pressure or the heat
buildup
Chemical Interactions - ANSWER-This may result in a build up
of heat that, in
turn, causes an increase in pressure and may be more
harmful than the
material the container was originally designed
to withstand
Chemical Reactivity/Change - ANSWER-The susceptibility
of a material to
release energy either by itself or in combination with
other materials.
Compound, mixture - ANSWER-Has a tendency to break down
into component
parts, sometimes in an explosive
manner
Concentration - ANSWER-The amount of acid or base compared
to the amount
of water
present
Conduction - ANSWER-The process by which heat or
electricity is directly
transmitted through a
substance
, Convection - ANSWER-The transfer of heat by circulation or
movement of the
heated parts of a liquid
or gas
Corrosive/Corrosivity (pH) - ANSWER-Corrosives are liquids or
solids that create visible destruction or irreversible alterations
in human skin tissue at the site of contact and cause steel to
corrode at a severely accelerated rate. Corrosivity is measured
in pH with a range of 1 to 14
Critical Pressure - ANSWER-This it the pressure that must be
applied to bring a
gas to its liquid
state
Critical Temperature - ANSWER-This is the minimum
temperature at which a
gas can be
liquified
Direct Contact - ANSWER-Hazardous materials being
introduced through
inhalation, absorption, ingestion,
or injection
Endothermic - ANSWER-A reaction accompanied by or requiring
the absorption