1 | Page
HAZMAT TECH I Questions and Answers
Any substance whose aqueous solutions are characterized by a
sour taste, they turn litmus dye red, react with bases and certain
metals to form salts, pH < 7 in its standard state
Ans: Acid
capable of burning, corroding, dissolving, or eating away by
chemical action, pH > 7 in its standard state
Ans: Caustic
Materials that can react or ignite if they are exposed to air
Ans: Air Reactivity
The rapid release of a liquefied gas that causes it to temporarily
remain in liquid state through rapid cooling
Ans: Auto-refrigeration
false assumption of product elimination until the product
resumes boiling and subsequent release
Ans: What is a risk of Auto-refrigeration
This includes bacteria, viruses, fungi, other microorganisms and
their associated toxins, many reproduce rapidly and require
minimal resources for survival
Ans: Biological agents
can be small molecules, peptides, or proteins that are capable of
causing disease on contact with or absorption by body tissues
Ans: Biological toxins
© 2025 All rights reserved
, 2 | Page
affects human health in a variety of ways ranging from allergic
reactions to death
Ans: what is a risk of Biological toxins
a chemical compound that affects bodily functions by preventing
the normal utilization of oxygen by body tissues. These agents do
not actually affect the blood in any way
Ans: Blood agents
The temp. at which the transition from a liquid to a gas state
occurs, where the vapor pressure of a liquid equals the
surrounding atmospheric pressure so that the liquid rapidly
becomes a vapor
Ans: Boiling point
A substance that initiates or accelerates a chemical reaction
without itself being affected
Ans: Catalyst
changes that take place on the molecular level that produces a
new substance
Ans: chemical change
when two or more chemicals or a chemical and its container are
incompatible
Ans: chemical interactions
separate elements that bond together to form a compound
mixture and have a tendency to break down into their component
parts, sometimes in an explosive manner
Ans: Compound mixture
the amount of acid or base is compared to the amount of water
present
© 2025 All rights reserved
, 3 | Page
Ans: concentration
minimum temp at which a gas can be liquefied no matter how
much pressure is applied, a gas cannot be liquefied above this
temp
Ans: critical temp.
the pressure that must be applied to bring a gas to its liquid state
Ans: critical pressure
the separation of a substance into two or more simpler
substances, or of a molecule into atoms or ions by the action of
heat or chemical process, this is usually reversible
Ans: Dissociation
a measure of a substance's tendency to deteriorate in the
presence of another substance or in a particular environment
Ans: Corrosive
the concentration or amount of material to which the body is
exposed to over a specific time period
Ans: dose
the biological reaction caused by the dose in the body, it is
directly related to the dose and its impact on bodily functions
Ans: dose response
the amount of gas produced by a given volume of liquid at a given
temperature
Ans: Expansion ratio
the minimum temp at which a material gives off vapor in
sufficient concentration to form an ignitable mixture with air and
will not continue to burn
© 2025 All rights reserved
, 4 | Page
Ans: flash point
the temp at which enough vapors are given off to support
continuous burning
Ans: fire point
the difference between the upper and lower flammable limits
Ans: flammable range
the minimum concentration of vapor to air below which a flame
will not propagate in the presence of an ignition source, "too lean
to burn"
Ans: lower explosive limit (LEL)
the maximum vapor to air concentration above which a flame will
not propagate, "too rich to burn"
Ans: Upper explosive limit (UEL)
the period of time it takes for a substance undergoing decay to
decrease by half
Ans: half-life
subgroup of aromatic hydrocarbons, in which one of the hydrogen
molecules is substituted by a halogen group
Ans: Halogenated Hydrocarbon
added to products to control their chemical reaction with other
products, if not added or escapes during an incident the material
will being to polymerize
Ans: Inhibitor
the temp at which a material will self-ignite and sustain
combustion in air without an external spark or flame
© 2025 All rights reserved
HAZMAT TECH I Questions and Answers
Any substance whose aqueous solutions are characterized by a
sour taste, they turn litmus dye red, react with bases and certain
metals to form salts, pH < 7 in its standard state
Ans: Acid
capable of burning, corroding, dissolving, or eating away by
chemical action, pH > 7 in its standard state
Ans: Caustic
Materials that can react or ignite if they are exposed to air
Ans: Air Reactivity
The rapid release of a liquefied gas that causes it to temporarily
remain in liquid state through rapid cooling
Ans: Auto-refrigeration
false assumption of product elimination until the product
resumes boiling and subsequent release
Ans: What is a risk of Auto-refrigeration
This includes bacteria, viruses, fungi, other microorganisms and
their associated toxins, many reproduce rapidly and require
minimal resources for survival
Ans: Biological agents
can be small molecules, peptides, or proteins that are capable of
causing disease on contact with or absorption by body tissues
Ans: Biological toxins
© 2025 All rights reserved
, 2 | Page
affects human health in a variety of ways ranging from allergic
reactions to death
Ans: what is a risk of Biological toxins
a chemical compound that affects bodily functions by preventing
the normal utilization of oxygen by body tissues. These agents do
not actually affect the blood in any way
Ans: Blood agents
The temp. at which the transition from a liquid to a gas state
occurs, where the vapor pressure of a liquid equals the
surrounding atmospheric pressure so that the liquid rapidly
becomes a vapor
Ans: Boiling point
A substance that initiates or accelerates a chemical reaction
without itself being affected
Ans: Catalyst
changes that take place on the molecular level that produces a
new substance
Ans: chemical change
when two or more chemicals or a chemical and its container are
incompatible
Ans: chemical interactions
separate elements that bond together to form a compound
mixture and have a tendency to break down into their component
parts, sometimes in an explosive manner
Ans: Compound mixture
the amount of acid or base is compared to the amount of water
present
© 2025 All rights reserved
, 3 | Page
Ans: concentration
minimum temp at which a gas can be liquefied no matter how
much pressure is applied, a gas cannot be liquefied above this
temp
Ans: critical temp.
the pressure that must be applied to bring a gas to its liquid state
Ans: critical pressure
the separation of a substance into two or more simpler
substances, or of a molecule into atoms or ions by the action of
heat or chemical process, this is usually reversible
Ans: Dissociation
a measure of a substance's tendency to deteriorate in the
presence of another substance or in a particular environment
Ans: Corrosive
the concentration or amount of material to which the body is
exposed to over a specific time period
Ans: dose
the biological reaction caused by the dose in the body, it is
directly related to the dose and its impact on bodily functions
Ans: dose response
the amount of gas produced by a given volume of liquid at a given
temperature
Ans: Expansion ratio
the minimum temp at which a material gives off vapor in
sufficient concentration to form an ignitable mixture with air and
will not continue to burn
© 2025 All rights reserved
, 4 | Page
Ans: flash point
the temp at which enough vapors are given off to support
continuous burning
Ans: fire point
the difference between the upper and lower flammable limits
Ans: flammable range
the minimum concentration of vapor to air below which a flame
will not propagate in the presence of an ignition source, "too lean
to burn"
Ans: lower explosive limit (LEL)
the maximum vapor to air concentration above which a flame will
not propagate, "too rich to burn"
Ans: Upper explosive limit (UEL)
the period of time it takes for a substance undergoing decay to
decrease by half
Ans: half-life
subgroup of aromatic hydrocarbons, in which one of the hydrogen
molecules is substituted by a halogen group
Ans: Halogenated Hydrocarbon
added to products to control their chemical reaction with other
products, if not added or escapes during an incident the material
will being to polymerize
Ans: Inhibitor
the temp at which a material will self-ignite and sustain
combustion in air without an external spark or flame
© 2025 All rights reserved
