FEMA IS-005.a: An Introduction to Hazardous Materials questions and
answers A+ Grade 2026\2027
The passing of a substance into the circulatory system of the body. Also used specifically to refer to
entry of toxicants through the skin.
- correct answer Absorption
American Conference of Governmental Industrial Hygienist
- correct answer ACGIH
An exposure to a toxic substance which occurs in a short or single time period.
- correct answer Acute Exposure
Any poisonous effect produced by a single short-term exposure. The LD50 of a substance (the lethal
does at which 50% of test animals succumb to the toxicity of the chemical) is typically used as a measure
of its acute toxicity.
- correct answer Acute Toxicity
A biological response to exposure to multiple chemicals which is equal to the sum of the effects of the
individual agents.
- correct answer Additive Effect
The bonding of chemicals to soil particles or other surfaces.
- correct answer Adsorption
A solid particle or liquid droplet suspended in air. An aerosol is larger than a molecule and can be
filtered from the air.
- correct answer Aerosol
, The situation in which two chemicals interfere with each other's actions, or one chemical interferes with
the action of the other.
- correct answer Antagonism
An underground bed, or layer, of earth, gravel, or porous storage that contains water.
- correct answer Aquifer
Chemicals that starve the cells of an individual from the life-giving oxygen needed to sustain
metabolism.
- correct answer Asphyxiants
Capable of decomposing quickly through the action of microorganisms.
- correct answer Biodegradable
The tendency of certain chemicals to become concentrated as they move into and up the food chain.
- correct answer Biomagnification
The temperature at which a liquid will start to become a gas, and boil. A chemical with a low boiling
point can boil and evaporate quickly. If a material that is flammable also has a low boiling point, a
special fire hazard exists.
- correct answer Boiling Point
A chemical or physical agent that encourages cells to develop cancer.
- correct answer Carcinogen
Toxicants that deaden the central nervous systems (CNS), diminishing sensation.
- correct answer Central Nervous System Depressants
The Comprehensive Environmental Response, Compensation, and Liability Act of 1980- the Federal
statute that authorized "Superfund." Administered by EPA, the law provides funding for cleanups and
emergency response actions for hazardous substances at the worst hazardous waste sites in the United
States. CERCLA is also significant because it set the first criteria for notification of emergencies involving
hazardous substances. Superfund regulates abandoned waste disposal sites; for active disposal site
regulation.
- correct answer CERCLA
answers A+ Grade 2026\2027
The passing of a substance into the circulatory system of the body. Also used specifically to refer to
entry of toxicants through the skin.
- correct answer Absorption
American Conference of Governmental Industrial Hygienist
- correct answer ACGIH
An exposure to a toxic substance which occurs in a short or single time period.
- correct answer Acute Exposure
Any poisonous effect produced by a single short-term exposure. The LD50 of a substance (the lethal
does at which 50% of test animals succumb to the toxicity of the chemical) is typically used as a measure
of its acute toxicity.
- correct answer Acute Toxicity
A biological response to exposure to multiple chemicals which is equal to the sum of the effects of the
individual agents.
- correct answer Additive Effect
The bonding of chemicals to soil particles or other surfaces.
- correct answer Adsorption
A solid particle or liquid droplet suspended in air. An aerosol is larger than a molecule and can be
filtered from the air.
- correct answer Aerosol
, The situation in which two chemicals interfere with each other's actions, or one chemical interferes with
the action of the other.
- correct answer Antagonism
An underground bed, or layer, of earth, gravel, or porous storage that contains water.
- correct answer Aquifer
Chemicals that starve the cells of an individual from the life-giving oxygen needed to sustain
metabolism.
- correct answer Asphyxiants
Capable of decomposing quickly through the action of microorganisms.
- correct answer Biodegradable
The tendency of certain chemicals to become concentrated as they move into and up the food chain.
- correct answer Biomagnification
The temperature at which a liquid will start to become a gas, and boil. A chemical with a low boiling
point can boil and evaporate quickly. If a material that is flammable also has a low boiling point, a
special fire hazard exists.
- correct answer Boiling Point
A chemical or physical agent that encourages cells to develop cancer.
- correct answer Carcinogen
Toxicants that deaden the central nervous systems (CNS), diminishing sensation.
- correct answer Central Nervous System Depressants
The Comprehensive Environmental Response, Compensation, and Liability Act of 1980- the Federal
statute that authorized "Superfund." Administered by EPA, the law provides funding for cleanups and
emergency response actions for hazardous substances at the worst hazardous waste sites in the United
States. CERCLA is also significant because it set the first criteria for notification of emergencies involving
hazardous substances. Superfund regulates abandoned waste disposal sites; for active disposal site
regulation.
- correct answer CERCLA
