The concentration of the dust particles of the size 0.5 to 5 microns adjacent to the working face should not be more than Options: A . &nbsp200 particles/cm3 B . &nbsp250 particles/cm3 C . &nbsp300 particles/cm3 D . &nbsp450 particles/cm3

The concentration of the dust particles of the size 0.5 to 5 microns adjacent to

Question

The concentration of the dust particles of the size 0.5 to 5 microns adjacent to the working face should not be more than

Options:

A . 200 particles/cm3

B . 250 particles/cm3

C . 300 particles/cm3

D . 450 particles/cm3

Answer: Option D

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