List of top Mining Engineering Questions on Mine Ventilation

A centrifugal fan rotating at \(600\) rpm delivers \(70\ \mathrm{cu.m/s}\) of air. If the speed is reduced to \(300\) rpm, the quantity of air delivered in \(\mathrm{cu.m/s}\) will be
The quantity of air taken by an auxiliary fan should not exceed
A Draeger Gas Mask does not filter
The cross-measure borehole method is used for
The water gauge developed and quantity circulated with an axial flow fan depends on
A centrifugal fan rotating at \(500~\mathrm{rpm}\) delivers \(70~\mathrm{m^3/s}\) of air. If the speed is reduced to \(200~\mathrm{rpm}\), the quantity of air delivered in \(\mathrm{m^3/s}\) will be
In a centrifugal flow fan, the conversion of velocity pressure to static pressure is accomplished with the help of
Quantity of air to be circulated to underground workings where \(150\) workers are employed in a largest shift and daily production is \(500\) t will be
In an underground coal mine, a fan delivers air through a cross-sectional area of \(5~\mathrm{m^2}\) with an average air velocity of \(4~\mathrm{m/s}\). What is the quantity of air circulated by the fan?
In a mine ventilation system, the resistance of an airway is such that when air quantity is \(10~\mathrm{m^3/s}\), the pressure drop is \(100~\mathrm{Pa}\). What will be the pressure drop when the air quantity is increased to \(20~\mathrm{m^3/s}\)?
If the wet bulb temperature of air at a particular place in a mine is \(31^\circ\mathrm{C}\), then the velocity of air in that place should be
The operating point of a mine fan is
The water gauge developed and quantity circulated with an axial flow fan depends on
A centrifugal fan rotating at \(600\) rpm delivers \(70\ \mathrm{cu.m/s}\) of air. If the speed is reduced to \(300\) rpm, the quantity of air delivered in \(\mathrm{cu.m/s}\) will be
The quantity of air taken by an auxiliary fan should not exceed
A Draeger Gas Mask does not filter
The cross-measure borehole method is used for
In an underground coal mine, a fan delivers air through a cross-sectional area of \(5~\mathrm{m^2}\) with an average air velocity of \(4~\mathrm{m/s}\). What is the quantity of air circulated by the fan?
In a mine ventilation system, the resistance of an airway is such that when air quantity is \(10~\mathrm{m^3/s}\), the pressure drop is \(100~\mathrm{Pa}\). What will be the pressure drop when the air quantity is increased to \(20~\mathrm{m^3/s}\)?
A centrifugal fan rotating at \(500~\mathrm{rpm}\) delivers \(70~\mathrm{m^3/s}\) of air. If the speed is reduced to \(200~\mathrm{rpm}\), the quantity of air delivered in \(\mathrm{m^3/s}\) will be
In a centrifugal flow fan, the conversion of velocity pressure to static pressure is accomplished with the help of
If the wet bulb temperature of air at a particular place in a mine is \(31^\circ\mathrm{C}\), then the velocity of air in that place should be
The operating point of a mine fan is
Quantity of air to be circulated to underground workings where \(150\) workers are employed in a largest shift and daily production is \(500\) t will be