COSS Industrial Hygiene 2

Question 1

What type of ventilation system captures contaminants at their source before they can disperse into the workplace air?

Accepted Answer

Local exhaust ventilation (LEV)

Answer

Local exhaust ventilation (LEV) captures contaminants at or near their source through hoods, ducts, and air-cleaning devices, preventing them from dispersing into the work environment.

Question 2

According to OSHA's Hazard Communication Standard (HazCom), Safety Data Sheets must contain how many sections?

Accepted Answer

16 sections

Answer

OSHA's HazCom 2012 standard, aligned with the Globally Harmonized System (GHS), requires SDSs to contain exactly 16 standardized sections.

Question 3

Which type of industrial hygiene monitoring involves placing a sampler directly on the worker to measure the air they actually breathe?

Accepted Answer

Personal sampling

Answer

Personal sampling places collection devices within the worker's breathing zone (a 10-inch sphere around the nose and mouth) to measure actual inhalation exposure.

Question 4

Silica dust in the respirable fraction is categorized under which class of industrial hygiene particulates?

Accepted Answer

Respirable crystalline silica

Answer

Respirable crystalline silica is a specific regulated class of particulate with OSHA-specific PELs (29 CFR 1910.1053) due to its severe lung disease risk including silicosis and lung cancer.

Question 5

What does STEL stand for in occupational exposure limits?

Accepted Answer

Short-Term Exposure Limit

Answer

STEL (Short-Term Exposure Limit) is the 15-minute TWA concentration that should not be exceeded during any part of the workday, even if the 8-hour TWA is within limits.

COSS - Certified Occupational Safety Specialist Practice Test

COSS - Certified Occupational Safety Specialist Practice Test

COSS Industrial Hygiene 2