HAZMAT TECH EXAM A & B 140 QUESTIONS &
CORRECT ANSWERS LATEST 2025
The packing group number on radioactive shipping labels indicate - ANSWER-
radioactive levels
You are on scene at an incident involving a tank truck wreck in creek with material
leaking from the tank and settling in the bottom of the creek Which specific
gravity is most likely to represent the leaking material - ANSWER-1.8
Pyrophoric materials ignite when they : - ANSWER-contact dry air
The lowest temperature at which liquid vapors can ignite with ignition source and
not continue to burn is the - ANSWER-flash point
Substances which are pyrophoric are - ANSWER-air reactive
Chemicals with specific gravities _ tend to float - ANSWER-less than one
Anthrax and ricin are examples of - ANSWER-biological
Which is a riot agent - ANSWER-Mace
A byproduct produced by biological sources including ricin - ANSWER-toxins
,_ can give you any information needed about hazardous materials - ANSWER-
CHEMTREC
A _ is used to control the rate of a chemical reaction - ANSWER-inhibitor
A chemical combination of two or more elements that is electrically neutral is a -
ANSWER-compound
SADT is an acronym for - ANSWER-self accelerating decomposition temperature
The ability of a substance to change from solid to a vapor phase without passing
through a liquid phase : - ANSWER-sublimation
is the measurement of the thickness of a liquid and its ability to flow . - ANSWER-
Viscosity
The temperature at which solids change to liquid is the _ point - ANSWER-melting
MSST is an acronym for _ storage temperature - ANSWER-maximum safe
The ability of a material to undergo a chemical reaction with the release of energy
is - ANSWER-instability
A chemical added to a product to control its polymerization is - ANSWER-inhibitor
, As the _ increases the production of gas and the size of the hazard area increases
- ANSWER-expansion ratio
_ is the maximum temperature at which a gas cannot be liquefied no matter how
much pressure is applied - ANSWER-Critical temperature
_ is applied to bring a liquid to a gaseous state - ANSWER-Critical pressure
The minimum temperature to ignite a gas or vapor without a spark or flame being
present is - ANSWER-autoignition
Materials that spontaneously emit ionizing radiation are called _ materials -
ANSWER-radioactive
The chemical formed between two atoms when they share electrons pairs so that
each atom . provides half the electron is - ANSWER-covalent
The percentage of an acid or base dissolved in water is - ANSWER-concentration
The lower the boiling point the higher the _ of the chemical - ANSWER-volatility
The maximum vapor to air concentration above which propagation of as fiame
will not occur is the - ANSWER-UEL
The lowest temperature at which a solid or a liquid will keep burning once ignited
is the - ANSWER-fire point
CORRECT ANSWERS LATEST 2025
The packing group number on radioactive shipping labels indicate - ANSWER-
radioactive levels
You are on scene at an incident involving a tank truck wreck in creek with material
leaking from the tank and settling in the bottom of the creek Which specific
gravity is most likely to represent the leaking material - ANSWER-1.8
Pyrophoric materials ignite when they : - ANSWER-contact dry air
The lowest temperature at which liquid vapors can ignite with ignition source and
not continue to burn is the - ANSWER-flash point
Substances which are pyrophoric are - ANSWER-air reactive
Chemicals with specific gravities _ tend to float - ANSWER-less than one
Anthrax and ricin are examples of - ANSWER-biological
Which is a riot agent - ANSWER-Mace
A byproduct produced by biological sources including ricin - ANSWER-toxins
,_ can give you any information needed about hazardous materials - ANSWER-
CHEMTREC
A _ is used to control the rate of a chemical reaction - ANSWER-inhibitor
A chemical combination of two or more elements that is electrically neutral is a -
ANSWER-compound
SADT is an acronym for - ANSWER-self accelerating decomposition temperature
The ability of a substance to change from solid to a vapor phase without passing
through a liquid phase : - ANSWER-sublimation
is the measurement of the thickness of a liquid and its ability to flow . - ANSWER-
Viscosity
The temperature at which solids change to liquid is the _ point - ANSWER-melting
MSST is an acronym for _ storage temperature - ANSWER-maximum safe
The ability of a material to undergo a chemical reaction with the release of energy
is - ANSWER-instability
A chemical added to a product to control its polymerization is - ANSWER-inhibitor
, As the _ increases the production of gas and the size of the hazard area increases
- ANSWER-expansion ratio
_ is the maximum temperature at which a gas cannot be liquefied no matter how
much pressure is applied - ANSWER-Critical temperature
_ is applied to bring a liquid to a gaseous state - ANSWER-Critical pressure
The minimum temperature to ignite a gas or vapor without a spark or flame being
present is - ANSWER-autoignition
Materials that spontaneously emit ionizing radiation are called _ materials -
ANSWER-radioactive
The chemical formed between two atoms when they share electrons pairs so that
each atom . provides half the electron is - ANSWER-covalent
The percentage of an acid or base dissolved in water is - ANSWER-concentration
The lower the boiling point the higher the _ of the chemical - ANSWER-volatility
The maximum vapor to air concentration above which propagation of as fiame
will not occur is the - ANSWER-UEL
The lowest temperature at which a solid or a liquid will keep burning once ignited
is the - ANSWER-fire point
