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Mining Objective Questions Useful for Competitive Examination , 40%Q87 The recommended instrument for the air borne respirable dust sampling in theIndian mines is a) CLP-10 b) Konimeter c) RAM-I d) NCB/MRE-113AQ88 The oxygen concentration in underground mine should not be less than a) 2093% b) 20% c) 19% d) 18%Q89 the ,...

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Patented electronic laminar flow control Internal secondary standard calibrates the pump continuously, maintaining OSHA compliance Check against a primary standard only once a month or every 200 hours for coal mine dust sampling...

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