CSS Industrial Hygiene and Health Hazards 1

Question 1

What is the OSHA Permissible Exposure Limit (PEL) for an 8-hour time-weighted average (TWA) for noise in general industry?

Accepted Answer

90 dBA

Answer

OSHA's PEL for occupational noise exposure is 90 dBA as an 8-hour TWA for general industry under 29 CFR 1910.95.

Question 2

Which sampling method measures a worker's actual breathing zone exposure to airborne contaminants throughout a work shift?

Accepted Answer

Personal sampling

Answer

Personal sampling involves placing a collection device in the worker's breathing zone to accurately measure individual exposure over a shift.

Question 3

What term describes the concentration of a chemical at which 50% of a test animal population dies within a specified period?

Accepted Answer

LC50

Answer

LC50 (Lethal Concentration 50) is the airborne concentration that kills 50% of test animals, while LD50 refers to a lethal dose via ingestion or skin contact.

Question 4

OSHA's Hazard Communication Standard (HazCom) requires Safety Data Sheets to follow which format?

Accepted Answer

16-section GHS format

Answer

OSHA's HazCom 2012 (29 CFR 1910.1200) aligns with GHS and requires SDSs to have a standardized 16-section format.

Question 5

Which type of health hazard results from a single short-term exposure to a high concentration of a substance?

Accepted Answer

Acute health effect

Answer

Acute health effects occur rapidly after a single or short-term exposure to a hazardous substance at high concentrations.

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CSS Industrial Hygiene and Health Hazards 1