COSS Industrial Hygiene 1

Question 1

Which of the following best defines industrial hygiene?

Accepted Answer

The science of anticipating, recognizing, evaluating, and controlling workplace health hazards

Answer

Industrial hygiene is defined as the science and art of anticipating, recognizing, evaluating, and controlling environmental factors arising from or in the workplace that may cause sickness or impaired health.

Question 2

The ACGIH Threshold Limit Value (TLV-TWA) represents the airborne concentration of a substance to which workers may be repeatedly exposed for how long without adverse health effects?

Accepted Answer

8 hours per day, 40 hours per week

Answer

The TLV-TWA is the time-weighted average concentration for a conventional 8-hour workday and 40-hour workweek that nearly all workers may be repeatedly exposed to without adverse effects.

Question 3

Which industrial hygiene sampling method collects a contaminant sample over a defined period to determine the average concentration during that time?

Accepted Answer

Integrated sampling

Answer

Integrated (or long-term) sampling collects the contaminant over a defined period, typically a full work shift, to determine the time-weighted average concentration.

Question 4

What does the term 'action level' (AL) represent under OSHA health standards?

Accepted Answer

Half the permissible exposure limit that triggers certain compliance requirements

Answer

OSHA's action level is typically set at 50% of the PEL and triggers requirements such as air monitoring, medical surveillance, and employee training.

Question 5

Which category of health hazard is associated with noise-induced hearing loss?

Accepted Answer

Physical hazard

Answer

Noise is classified as a physical hazard because it involves energy (sound waves) rather than chemical or biological agents that affect the body.

COSS - Certified Occupational Safety Specialist Practice Test

COSS - Certified Occupational Safety Specialist Practice Test

COSS Industrial Hygiene 1