Mining Engineering
2017 · Paper 1
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Complete GATE MN 2017 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 46–48 of 65. Imported answers require review unless explicitly marked reviewed.
Question 46
Open questionMNMCQ2 marksNeeds review
If the rank of the following matrix is less than 3, the values of
areYour answerChoose one option.
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The discharge rate of a water pump is 0.25 m³/s. The diameter of the discharge and suction nozzles are 300 and 350 mm respectively. The measured pressure at the discharge end located 0.25 m above the center line of the impeller is 150 kN/m² and the pressure at the suction gage located at the centre line of the impeller is 20 kN/m². Specific weight of water is 9810 N/m³. The total dynamic head for the above installation in m is ________
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In a mine, 200 and 250 persons are deployed in the Panels A and B (shown in figure) respectively in the largest shift.
The panels produce 400 and 500 tonne/day respectively. The resistances of panels A and B are 0.3 Ns²m⁻⁸ and 0.4 Ns²m⁻⁸ respectively and the combined resistance of shaft and trunk airways is 0.5 Ns²m⁻⁸. The operating static pressure of the fan in Pa to provide the minimum air quantities in the panels as per CMR 1957 is ________
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