CIH Occupational Health Hazards 4

Question 1

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

Accepted Answer

Binding hemoglobin with ~240 times the affinity of oxygen

Answer

CO binds hemoglobin ~240 times more avidly than oxygen, forming carboxyhemoglobin and impairing oxygen delivery to tissues.

Question 2

What does the ACGIH Biological Exposure Index (BEI) represent?

Accepted Answer

A reference value for biological media corresponding to TLV exposure

Answer

BEIs are reference values for biological specimens corresponding to exposure at the TLV, used as a supplement to air monitoring rather than a regulatory limit.

Question 3

Which agricultural pesticide class is associated with inhibition of acetylcholinesterase, leading to cholinergic toxidrome?

Accepted Answer

Organophosphates and carbamates

Answer

Organophosphates and carbamates inhibit acetylcholinesterase, causing accumulation of acetylcholine and a cholinergic toxidrome (SLUDGE symptoms).

Question 4

OSHA's Hazard Communication Standard (HazCom 2012) requires Safety Data Sheets to follow which internationally harmonized format?

Accepted Answer

Globally Harmonized System (GHS)

Answer

HazCom 2012 aligned U.S. requirements with the Globally Harmonized System (GHS), standardizing 16-section SDS format and pictograms globally.

Question 5

Which type of hearing loss is primarily associated with occupational noise exposure?

Accepted Answer

Sensorineural hearing loss at high frequencies (4000 Hz notch)

Answer

Noise-induced hearing loss (NIHL) is sensorineural, characterized by a 4000 Hz notch on audiogram from damage to outer hair cells in the cochlea.

CIH - Certified Industrial Hygienist Exam Practice Test

CIH - Certified Industrial Hygienist Exam Practice Test

CIH Occupational Health Hazards 4