ABT Occupational Toxicology

Question 1

Which organization establishes Threshold Limit Values (TLVs) for occupational chemical exposures?

Accepted Answer

ACGIH

Answer

OSHA

Answer

NIOSH

Answer

EPA

Question 2

OSHA Permissible Exposure Limits (PELs) are typically expressed as what type of measurement?

Accepted Answer

8-hour time-weighted average (TWA)

Answer

15-minute short-term exposure limit

Answer

Ceiling value that must never be exceeded

Answer

30-minute excursion limit

Question 3

For volatile organic compounds (VOCs) in the workplace, which route of exposure is generally most significant?

Accepted Answer

Inhalation

Answer

Dermal absorption

Answer

Oral ingestion

Answer

Ocular absorption

Question 4

Under OSHA's lead standard for general industry, at what blood lead concentration must a worker be medically removed from exposure?

Accepted Answer

60 µg/dL

Answer

20 µg/dL

Answer

40 µg/dL

Answer

80 µg/dL

Question 5

The 'skin' notation on an ACGIH TLV primarily indicates that:

Accepted Answer

Significant dermal absorption can contribute to the total body burden

Answer

The substance causes dermatitis as its primary toxic effect

Answer

Skin contact with the substance is strictly prohibited

Answer

The substance is a confirmed skin carcinogen

Question 6

Red blood cell (erythrocyte) cholinesterase activity is the preferred biomarker for monitoring occupational exposure to which class of pesticides?

Accepted Answer

Organophosphates

Answer

Pyrethroids

Answer

Organochlorines

Answer

Neonicotinoids

Question 7

In the hierarchy of occupational health controls, which control method is most preferred because it completely removes the hazard?

Accepted Answer

Elimination

Answer

Engineering controls

Answer

Administrative controls

Answer

Personal protective equipment