Mining Engineering > GATE 2023 > Mine Ventilation
A duct of diameter 0.60 m with an exhausting fan has -97.5 mm wg static pressure behind the fan when the air flow rate is 4.0 m3/s. If an evasee with inlet to outlet area ratio of 1:4 and efficiency 60% is attached to the outlet of the fan, the static pressure of the fan in mm of wg becomes
Correct : c
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