Certified Industrial Hygienist (CIH) [exam-quick]

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An industrial hygienist is sampling for respirable crystalline silica in a dusty construction environment using a 10-mm nylon cyclone. To ensure the cyclone correctly separates the respirable fraction according to the ACGIH/ISO/CEN convention, what is the required flow rate and corresponding 50% cut-point?

1.7 L/min for a 5.0 µm cut-point 2.5 L/min for a 4.0 µm cut-point 2.0 L/min for a 10.0 µm cut-point 3.0 L/min for a 3.5 µm cut-point

Correct Answer:

2.5 L/min for a 4.0 µm cut-point

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