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

Administrative controls

Answer

Personal protective equipment (PPE)

Answer

Engineering controls

Question 2

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

Accepted Answer

Substitution

Answer

Engineering control

Answer

Administrative control

Answer

Isolation

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

The maximum concentration of a substance allowed in outdoor air

Answer

The recommended exposure level set by NIOSH for emergency response

Answer

The dose of a substance that causes death in 50% of test animals

Question 4

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

Accepted Answer

ACGIH (American Conference of Governmental Industrial Hygienists)

Answer

OSHA

Answer

NIOSH

Answer

EPA

Question 5

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

Accepted Answer

Concentration of airborne contaminants in the breathing zone

Answer

Temperature and humidity levels in the workplace

Answer

Noise levels exceeding OSHA action levels

Answer

Radiation exposure of workers in nuclear facilities

Question 6

What type of ventilation system removes contaminants at their source before they can spread into the work area?

Accepted Answer

Local exhaust ventilation (LEV)

Answer

General dilution ventilation

Answer

Positive pressure ventilation

Answer

Recirculation ventilation