NU 411 Exam 3 Practice Questions and
Answers
What is the precautionary principle? - Ans:-"When an activity raises threats of harm to human
health or the environment, precautionary measures should be taken"
Use this principle when activity threatens human life or health, outcome could be serious...
A colorless, odorless radioactive gas; linked with increased risk of lung cancer, exposure via inhalation -
Ans:✔✔-Radon (basement prime area of exposure)
What dangerous substance in the home is being described: older homes/remodeling; gasoline,
plumbing, exposure via ingestion or inhalation - Ans:✔✔-Lead
What is an unsafe level of radon in the home? - Ans:✔✔-> 4pci/L
What are some measures to prevent carbon monoxide poisoning (specifically during power outages)? -
Ans:✔✔-Never use oven to heat house during power outages, place generator outside at least 25 feet
from the house
What are some s/sx of carbon monoxide poisoning? - Ans:✔✔-HA and dizziness most common, then
blurred vision, N/V, and cherry red lips and skin
What sx of carbon monoxide poisoning would you see at the following % of CO in blood
<10
20-30
30-40
40-50
>50 - Ans:✔✔-<10: None
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