COHN COHN Environmental and Industrial Hygiene

Question 1

What does the hierarchy of controls prioritize as the most effective method for controlling workplace hazards?

Accepted Answer

Elimination of the hazard

Answer

Elimination removes the hazard entirely and is the most effective control at the top of the hierarchy, followed by substitution, engineering controls, administrative controls, and PPE.

Question 2

Which industrial hygiene principle involves replacing a hazardous substance with a less hazardous one?

Accepted Answer

Substitution

Answer

Substitution is a preventive control that reduces risk by replacing a harmful material or process with a safer alternative.

Question 3

What is the Permissible Exposure Limit (PEL) as defined by OSHA?

Accepted Answer

The legal limit for worker exposure to a chemical or physical agent in the workplace

Answer

PELs are legally enforceable limits set by OSHA that define the maximum amount of a hazardous substance a worker may be exposed to over a specified time period.

Question 4

Which agency publishes Threshold Limit Values (TLVs) for workplace chemical exposures?

Accepted Answer

ACGIH (American Conference of Governmental Industrial Hygienists)

Answer

ACGIH publishes TLVs as guidelines representing conditions under which nearly all workers may be repeatedly exposed without adverse health effects.

Question 5

In industrial hygiene, what does 'air sampling' primarily assess?

Accepted Answer

Concentration of airborne contaminants in the breathing zone

Answer

Air sampling quantifies airborne chemical or biological contaminants in workers' breathing zones to compare against PELs, TLVs, or RELs.

COHN Exam Practice Test

COHN Exam Practice Test

COHN COHN Environmental and Industrial Hygiene