NEHA Hazardous Materials and Toxicology 3

Question 1

What is a 'carcinogen' in environmental health and toxicology?

Accepted Answer

A substance or agent that is capable of causing cancer

Answer

A carcinogen is any substance, organism, or agent that is capable of causing cancer by damaging DNA or disrupting cellular processes that control normal cell growth and division.

Question 2

What does 'IDLH' (Immediately Dangerous to Life or Health) represent in hazardous materials management?

Accepted Answer

The maximum airborne concentration from which a worker could escape without irreversible health effects or death within 30 minutes

Answer

IDLH represents the maximum atmospheric concentration of a hazardous substance from which a worker could escape within 30 minutes without suffering irreversible health effects or impaired escape capability.

Question 3

What is the health significance of polycyclic aromatic hydrocarbons (PAHs) in environmental health?

Accepted Answer

They are persistent organic pollutants formed during incomplete combustion that are carcinogenic and mutagenic

Answer

PAHs are a group of persistent organic pollutants formed during incomplete combustion of organic materials that are classified as probable or possible carcinogens and can cause mutagenic and genotoxic effects.

Question 4

In hazardous materials response, what does the NFPA 704 diamond (fire diamond) communicate?

Accepted Answer

Health hazard, flammability, reactivity, and special hazard information for emergency responders using a 0–4 rating scale

Answer

The NFPA 704 hazard identification system uses a diamond-shaped sign with four color-coded quadrants rating health (blue), flammability (red), instability/reactivity (yellow), and special hazards (white) on a 0–4 scale.

Question 5

What is 'environmental justice' as it relates to hazardous materials siting and environmental health?

Accepted Answer

The fair treatment and meaningful involvement of all people, regardless of race or income, in environmental decisions, and the avoidance of disproportionate environmental burdens on vulnerable communities

Answer

Environmental justice addresses the disproportionate siting of hazardous facilities and the concentration of environmental burdens in low-income and minority communities, requiring fair treatment and meaningful participation in environmental decision-making.

NEHA - National Environmental Health Association Practice Test

NEHA - National Environmental Health Association Practice Test

NEHA Hazardous Materials and Toxicology 3