HAZWOPER 40 - Lesson 3 - Toxicology Test
2023-2024
Chemicals in combination can produce different biological responses than the
responses seen when exposure is to one chemical alone.
True
False - ANSWER True
________ is the most common route of exposure leading to a toxic dose in the work
environment
Injection
Ingestion
Inhalation
Eye/Skin contact - ANSWER
LD 50 of 25 mg/m3 means that a concentration of 25 mg/m3 of a certain substance
indicates:
50 people out of a group of 80 exposed to a concentration 25 mg/m3 of a substance
were shown to have experienced a fatal dose.
50% of the concentration of a substance cause fatality in those be exposed.
A concentration of 25 mg/m3 of a substance is shown to have been fatal to 50
percent of a test group of animals.
LD 50 is a fictitious term and does not indicate anything. - ANSWER A
concentration of 25 mg/m3 of a substance is shown to have been fatal to 50 percent
of a test group of animals.
Factors affecting response to chemical exposure include:
Toxicity
Route of exposure
Chemical dose
, All of the above - ANSWER All of the above
________ provide most of what we know about the dangerous effects of toxic
substances.
Epidemiological studies
Animal studies
Estimation studies
Actual exposures to a chemical in the workplace - ANSWER Epidemiological
studies
Animal studies
Example of chemical ________ are carbon monoxide and hydrogen cyanide.
Hepatoxins
Hematoxins
Asphyxiants
Nephrotoxins - ANSWER Asphyxiants
The ACGIH publication: ________ for Chemical Substances and Physical Agents,
OSHA standard 29 CFR part 1910.1000, and other standards reference identify
substances that can be readily absorbed through the skin, mucous membranes,
and/or eyes by either airborne exposures or direct contact with a liquid.
Threshold Limit Values
HAZCOM
Right-to-know
SDS - ANSWER Threshold Limit Values
Polyurethane foam, when burnt, gives off:
Sulfuric acid
Cyanide gas
Ethane
Phosphine - ANSWER Cyanide gas
2023-2024
Chemicals in combination can produce different biological responses than the
responses seen when exposure is to one chemical alone.
True
False - ANSWER True
________ is the most common route of exposure leading to a toxic dose in the work
environment
Injection
Ingestion
Inhalation
Eye/Skin contact - ANSWER
LD 50 of 25 mg/m3 means that a concentration of 25 mg/m3 of a certain substance
indicates:
50 people out of a group of 80 exposed to a concentration 25 mg/m3 of a substance
were shown to have experienced a fatal dose.
50% of the concentration of a substance cause fatality in those be exposed.
A concentration of 25 mg/m3 of a substance is shown to have been fatal to 50
percent of a test group of animals.
LD 50 is a fictitious term and does not indicate anything. - ANSWER A
concentration of 25 mg/m3 of a substance is shown to have been fatal to 50 percent
of a test group of animals.
Factors affecting response to chemical exposure include:
Toxicity
Route of exposure
Chemical dose
, All of the above - ANSWER All of the above
________ provide most of what we know about the dangerous effects of toxic
substances.
Epidemiological studies
Animal studies
Estimation studies
Actual exposures to a chemical in the workplace - ANSWER Epidemiological
studies
Animal studies
Example of chemical ________ are carbon monoxide and hydrogen cyanide.
Hepatoxins
Hematoxins
Asphyxiants
Nephrotoxins - ANSWER Asphyxiants
The ACGIH publication: ________ for Chemical Substances and Physical Agents,
OSHA standard 29 CFR part 1910.1000, and other standards reference identify
substances that can be readily absorbed through the skin, mucous membranes,
and/or eyes by either airborne exposures or direct contact with a liquid.
Threshold Limit Values
HAZCOM
Right-to-know
SDS - ANSWER Threshold Limit Values
Polyurethane foam, when burnt, gives off:
Sulfuric acid
Cyanide gas
Ethane
Phosphine - ANSWER Cyanide gas
