Mining Engineering > GATE 2026 > Mine Ventilation - Natural Ventilation Pressure
A main mechanical ventilator installed for an underground mine develops a pressure of 25 mm wg. A natural ventilation pressure (NVP) of 15 mm wg acting in the mine aids the ventilator, and a total 500 m3 min-1 of air is circulated in the mine. Considering the same NVP aiding the ventilator, the pressure required, in mm wg, to be generated by the ventilator to circulate 1000 m3 min-1 of air, is _______________. (answer in integer)
Correct : 145
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