HAZMAT TECH I 400 QUESTIONS & CORRECT
ANSWERS LATEST 2025
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 - ANSWER-Acid
capable of burning, corroding, dissolving, or eating away by chemical action, pH >
7 in its standard state - ANSWER-Caustic
Materials that can react or ignite if they are exposed to air - ANSWER-Air
Reactivity
The rapid release of a liquefied gas that causes it to temporarily remain in liquid
state through rapid cooling - ANSWER-Auto-refrigeration
false assumption of product elimination until the product resumes boiling and
subsequent release - ANSWER-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 -
ANSWER-Biological agents
can be small molecules, peptides, or proteins that are capable of causing disease
on contact with or absorption by body tissues - ANSWER-Biological toxins
,affects human health in a variety of ways ranging from allergic reactions to death
- ANSWER-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 - ANSWER-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 - ANSWER-Boiling point
A substance that initiates or accelerates a chemical reaction without itself being
affected - ANSWER-Catalyst
changes that take place on the molecular level that produces a new substance -
ANSWER-chemical change
when two or more chemicals or a chemical and its container are incompatible -
ANSWER-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 - ANSWER-Compound mixture
the amount of acid or base is compared to the amount of water present -
ANSWER-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 - ANSWER-critical temp.
the pressure that must be applied to bring a gas to its liquid state - ANSWER-
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 - ANSWER-Dissociation
a measure of a substance's tendency to deteriorate in the presence of another
substance or in a particular environment - ANSWER-Corrosive
the concentration or amount of material to which the body is exposed to over a
specific time period - ANSWER-dose
the biological reaction caused by the dose in the body, it is directly related to the
dose and its impact on bodily functions - ANSWER-dose response
the amount of gas produced by a given volume of liquid at a given temperature -
ANSWER-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 - ANSWER-flash
point
the temp at which enough vapors are given off to support continuous burning -
ANSWER-fire point
, the difference between the upper and lower flammable limits - ANSWER-
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" - ANSWER-
lower explosive limit (LEL)
the maximum vapor to air concentration above which a flame will not propagate,
"too rich to burn" - ANSWER-Upper explosive limit (UEL)
the period of time it takes for a substance undergoing decay to decrease by half -
ANSWER-half-life
subgroup of aromatic hydrocarbons, in which one of the hydrogen molecules is
substituted by a halogen group - ANSWER-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 -
ANSWER-Inhibitor
the temp at which a material will self-ignite and sustain combustion in air without
an external spark or flame - ANSWER-ignition temp
materials that decompose spontaneously, polymerize, or otherwise self-react and
are generally considered unstable - ANSWER-instability
ANSWERS LATEST 2025
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 - ANSWER-Acid
capable of burning, corroding, dissolving, or eating away by chemical action, pH >
7 in its standard state - ANSWER-Caustic
Materials that can react or ignite if they are exposed to air - ANSWER-Air
Reactivity
The rapid release of a liquefied gas that causes it to temporarily remain in liquid
state through rapid cooling - ANSWER-Auto-refrigeration
false assumption of product elimination until the product resumes boiling and
subsequent release - ANSWER-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 -
ANSWER-Biological agents
can be small molecules, peptides, or proteins that are capable of causing disease
on contact with or absorption by body tissues - ANSWER-Biological toxins
,affects human health in a variety of ways ranging from allergic reactions to death
- ANSWER-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 - ANSWER-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 - ANSWER-Boiling point
A substance that initiates or accelerates a chemical reaction without itself being
affected - ANSWER-Catalyst
changes that take place on the molecular level that produces a new substance -
ANSWER-chemical change
when two or more chemicals or a chemical and its container are incompatible -
ANSWER-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 - ANSWER-Compound mixture
the amount of acid or base is compared to the amount of water present -
ANSWER-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 - ANSWER-critical temp.
the pressure that must be applied to bring a gas to its liquid state - ANSWER-
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 - ANSWER-Dissociation
a measure of a substance's tendency to deteriorate in the presence of another
substance or in a particular environment - ANSWER-Corrosive
the concentration or amount of material to which the body is exposed to over a
specific time period - ANSWER-dose
the biological reaction caused by the dose in the body, it is directly related to the
dose and its impact on bodily functions - ANSWER-dose response
the amount of gas produced by a given volume of liquid at a given temperature -
ANSWER-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 - ANSWER-flash
point
the temp at which enough vapors are given off to support continuous burning -
ANSWER-fire point
, the difference between the upper and lower flammable limits - ANSWER-
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" - ANSWER-
lower explosive limit (LEL)
the maximum vapor to air concentration above which a flame will not propagate,
"too rich to burn" - ANSWER-Upper explosive limit (UEL)
the period of time it takes for a substance undergoing decay to decrease by half -
ANSWER-half-life
subgroup of aromatic hydrocarbons, in which one of the hydrogen molecules is
substituted by a halogen group - ANSWER-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 -
ANSWER-Inhibitor
the temp at which a material will self-ignite and sustain combustion in air without
an external spark or flame - ANSWER-ignition temp
materials that decompose spontaneously, polymerize, or otherwise self-react and
are generally considered unstable - ANSWER-instability
