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

ANSI Z400.1 variable-section format

Answer

ACGIH documentation format

Answer

EPA risk characterization format

Question 2

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

Accepted Answer

Binding to hemoglobin to form carboxyhemoglobin, impairing oxygen delivery

Answer

Inhibiting cytochrome P450 enzymes in the liver

Answer

Directly damaging alveolar epithelial cells through oxidative stress

Answer

Blocking sodium channels in cardiac conduction tissue

Question 3

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

Accepted Answer

2-Naphthylamine (beta-naphthylamine)

Answer

Benzene

Answer

Toluene

Answer

Aniline

Question 4

The ACGIH Biological Exposure Index (BEI) represents:

Accepted Answer

The biomarker level observed in healthy workers exposed at the TLV

Answer

The legally enforceable maximum permissible air concentration

Answer

The LD50 adjusted for an 8-hour occupational exposure

Answer

The minimum detectable concentration in biological specimens

Question 5

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

Accepted Answer

A granulomatous lung disease from cell-mediated hypersensitivity to beryllium

Answer

A fibrotic lung disease from direct cytotoxic effects of beryllium dust

Answer

An obstructive lung disease clinically identical to occupational asthma

Answer

An acute chemical pneumonitis from single high-level beryllium exposure

Question 6

In occupational health, 'Immediately Dangerous to Life or Health' (IDLH) is defined as:

Accepted Answer

The maximum concentration from which a worker can escape in 30 minutes without impairment

Answer

Any airborne concentration that causes acute irritation symptoms

Answer

The ceiling value above which no OSHA standard permits any exposure

Answer

A concentration equal to ten times the permissible exposure limit

Question 7

Which NIOSH respirator prefix indicates that the filter is strongly resistant (oil-proof) to oil-based aerosols?

Accepted Answer

P (e.g., P100)

Answer

N (e.g., N95)

Answer

R (e.g., R95)

Answer

S (e.g., S95)