List of top Mining Geology, Mine Development and Surveying Questions on Levels and Levelling asked in GATE MN

Water is pumped from a mine sump at the rate of 300 m³/hr to an inverted conical water tank, as shown. The rate of rise in water level in m/min, at the instant water level reaches at 5 m height from bottom of the tank, is____.(round off up to 2 decimals)

For a dumpy level, the bubble tube has sensitivity of 40" for one division. While taking a staff reading at a distance of 60 m, the bubble is out of centre by 2 divisions. The error in staff reading in mm is \(\underline{\hspace{1cm}}\). (round off to one decimal place)