Mining Engineering
2019 · Paper 1
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Complete GATE MN 2019 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 55–57 of 65. Imported answers require review unless explicitly marked reviewed.
Question 45
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A pump delivers 3000 liter of water in 2.0 minutes through a pipe of length 1000 m laid on a gradient of 1 in 10. The combined efficiency of pump and motor is 70%. If friction and shock losses are negligible, the input power to the motor in kW (rounded off to one decimal place) is
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A sand water slurry of specific gravity 1.45 contains sand of grain density 2.6 g/cc. The weight percent of sand in the slurry (rounded off to two decimal places) is
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For a mining company the unit transportation cost from a mine to a washery, and supply and demand are shown below:
| | Washery | | | Supply | |
|---|---|---|---|---|---|---|
Mine | | A | B | C | D | |
M1 | | 30 | 0 | 40 | 20 | 500 |
M2 | | 24 | 16 | 22 | 40 | 700 |
M3 | | 0 | 32 | 28 | 36 | 800 |
Demand | | 300 | 400 | 600 | 700 | |
The total cost of transportation using the Vogel’s approximation method is
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