COHN Toxicology and Biohazards 2

Question 1

A worker is exposed to an organophosphate pesticide. Which set of symptoms is MOST characteristic of this exposure?

Accepted Answer

Excessive salivation, miosis, bradycardia

Answer

Organophosphates inhibit acetylcholinesterase, causing cholinergic toxidrome with SLUDGE symptoms (salivation, lacrimation, urination, defecation, GI distress, emesis), miosis, and bradycardia.

Question 2

Under OSHA's Bloodborne Pathogen Standard, which of the following is classified as Other Potentially Infectious Material (OPIM)?

Accepted Answer

Cerebrospinal fluid and semen

Answer

OSHA's Bloodborne Pathogen Standard classifies cerebrospinal fluid, semen, vaginal secretions, and several other body fluids as OPIM regardless of visible blood content.

Question 3

The biological exposure index (BEI) for a chemical is BEST described as:

Accepted Answer

A reference value for assessing biological monitoring results in exposed workers

Answer

BEIs are reference values established by ACGIH for evaluating biological monitoring results, representing levels of determinants observed in healthy workers exposed at the TLV.

Question 4

A chemical with a Threshold Limit Value-Ceiling (TLV-C) must NEVER be exceeded:

Accepted Answer

At any time during the work shift

Answer

TLV-C is a ceiling concentration that should not be exceeded at any time, unlike TLV-TWA or TLV-STEL which allow time averaging.

Question 5

A laser cutter operator reports eye irritation and blurred vision. Which type of radiation hazard is MOST relevant to this worker?

Accepted Answer

Non-ionizing radiation from coherent light

Answer

Lasers emit coherent non-ionizing radiation that can cause severe retinal burns and corneal damage; proper laser safety eyewear rated for the specific wavelength is required.

COHN Exam Practice Test

COHN Exam Practice Test

COHN Toxicology and Biohazards 2