COSS Industrial Hygiene

Question 1

Which of the following best defines industrial hygiene?

Accepted Answer

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

Answer

The practice of maintaining cleanliness in manufacturing facilities

Answer

The process of inspecting facilities for OSHA compliance violations

Answer

The administration of first aid and medical treatment in occupational settings

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

4 hours per day, 20 hours per week

Answer

12 hours per day, 60 hours per week

Answer

10 hours per day, 50 hours per week

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

Grab sampling

Answer

Composite sampling

Answer

Instantaneous sampling

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

The concentration requiring immediate evacuation of all workers

Answer

The concentration at which OSHA requires immediate medical treatment

Answer

The ceiling concentration that must never be exceeded

Question 5

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

Accepted Answer

Physical hazard

Answer

Chemical hazard

Answer

Biological hazard

Answer

Ergonomic hazard

Question 6

An industrial hygienist is evaluating a worker's exposure to multiple chemical solvents simultaneously. What concept should be applied when the substances have additive effects?

Accepted Answer

The mixture formula using the sum of fractions rule

Answer

Synergistic effect calculation

Answer

The highest individual TLV for the mixture

Answer

A 50% reduction in the individual TLVs

Question 7

Which control method is considered most effective in the industrial hygiene hierarchy of controls?

Accepted Answer

Elimination or substitution

Answer

Administrative controls

Answer

Personal protective equipment

Answer

Engineering controls