ABT Occupational Toxicology 3

Question 1

Under OSHA's Hazard Communication Standard (HazCom 2012), Safety Data Sheets (SDS) must follow which standardized format?

Accepted Answer

GHS 16-section format

Answer

OSHA's HazCom 2012 aligned with the Globally Harmonized System (GHS) of Classification and Labelling of Chemicals, mandating a standardized 16-section SDS.

Question 2

Carbon monoxide (CO) exerts its primary toxic effect by:

Accepted Answer

Binding to hemoglobin to form carboxyhemoglobin, impairing oxygen delivery

Answer

CO binds to hemoglobin with approximately 240 times greater affinity than oxygen, forming carboxyhemoglobin (COHb) and severely reducing the oxygen-carrying capacity of blood.

Question 3

Which aromatic amine is classically associated with occupational bladder cancer in dye manufacturing workers?

Accepted Answer

2-Naphthylamine (beta-naphthylamine)

Answer

2-Naphthylamine is a potent bladder carcinogen that undergoes N-hydroxylation and concentrates in urine, causing urothelial tumors in exposed workers.

Question 4

The ACGIH Biological Exposure Index (BEI) represents:

Accepted Answer

The biomarker level observed in healthy workers exposed at the TLV

Answer

BEIs are reference values corresponding to biomarker levels found in healthy workers exposed at the TLV, used as guidelines for occupational biological monitoring programs.

Question 5

Chronic beryllium disease (CBD/berylliosis) is best characterized as:

Accepted Answer

A granulomatous lung disease from cell-mediated hypersensitivity to beryllium

Answer

CBD is a granulomatous lung disease occurring in genetically susceptible individuals (HLA-DPB1 Glu69+ carriers) through a cell-mediated (Type IV) immune response to beryllium.

ABT - American Board of Toxicology Practice Test

ABT - American Board of Toxicology Practice Test

ABT Occupational Toxicology 3