NEHA Hazardous Materials and Toxicology 2

Question 1

What health effects are associated with chronic exposure to lead, particularly in children?

Accepted Answer

Neurodevelopmental impairment, reduced IQ, behavioral problems, and learning disabilities

Answer

Chronic lead exposure in children causes irreversible neurodevelopmental damage including reduced IQ, impaired cognitive function, behavioral problems, and learning disabilities, with no safe level of exposure identified.

Question 2

What is the primary health concern from exposure to asbestos?

Accepted Answer

Mesothelioma, lung cancer, and asbestosis from inhalation of fibers

Answer

Inhalation of asbestos fibers causes mesothelioma (cancer of the pleural lining), lung cancer, and asbestosis (progressive lung scarring), often with a latency period of decades between exposure and disease.

Question 3

What is meant by the term 'permissible exposure limit (PEL)' in occupational health?

Accepted Answer

The maximum airborne concentration of a hazardous substance to which workers may be exposed over an 8-hour workday

Answer

OSHA's PELs are legally enforceable limits on the airborne concentration of hazardous substances in the workplace, typically expressed as time-weighted averages over an 8-hour workday or 40-hour workweek.

Question 4

What is 'biomagnification' as distinguished from bioaccumulation?

Accepted Answer

The progressive increase in toxin concentration at successively higher levels of a food chain

Answer

Biomagnification describes the progressive increase in concentration of a persistent substance at each successive trophic level of a food chain, so top predators accumulate the highest concentrations.

Question 5

What hazard communication information must be present on Safety Data Sheets (SDS) under OSHA's Hazard Communication Standard?

Accepted Answer

16 standardized sections including chemical identity, health hazards, physical hazards, exposure limits, and emergency response information

Answer

OSHA's updated Hazard Communication Standard (GHS-aligned) requires 16 standardized SDS sections covering chemical identification, hazard identification, composition, first aid, fire fighting, handling, exposure controls, health effects, and regulatory information.

NEHA - National Environmental Health Association Practice Test

NEHA - National Environmental Health Association Practice Test

NEHA Hazardous Materials and Toxicology 2