HAZWOPER 40 - Lesson 3 - Toxicology Exam Questions & Answers (Grade A+).docx

HAZWOPER 40 - Lesson 3 -
Toxicology Exam Questions &
Answers (Grade A+)
Chemicals in combination can produce different biological
responses than the responses seen when exposure is to one
chemical alone.
True
False -
correct answer ✅True


________ is the most common route of exposure leading to a toxic
dose in the work environment


Injection
Ingestion
Inhalation
Eye/Skin contact -


LD 50 of 25 mg/m3 means that a concentration of 25 mg/m3 of a
certain substance indicates:

, HAZWOPER 40 - Lesson 3 -
Toxicology Exam Questions &
Answers (Grade A+)
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. -
correct 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