HAZWOPER 40 - Lesson 3 - Toxicology Test
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
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
