The concentration of the dust particles of the size 0.5 to 5 microns adjacent to the working face should not be more than-A-200 particles/cm3B-250 particles/cm3C-300 particles/cm3D-450 particles/cm3E-400 particles/cm3-D-450 particles/cm3

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D 450 particles/cm3 No answer description is available.

Tunnelling - Engineering

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

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Tunnelling - Engineering

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

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For help Students Orientation Mcqs Questions

For help Students Orientation
Mcqs Questions