Mining Engineering
2023 · Paper 1
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Complete GATE MN 2023 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 64–65 of 65. Imported answers require review unless explicitly marked reviewed.
Question 64
Open questionMNNAT2 marksNeeds review
A fan installed in a line ventilation system circulates 30 m³/s of air to two districts A and B as shown in Figure below. It is desired to increase the quantity of air by 20% in the district B using a booster fan in it. Assuming that the main fan pressure is unchanged, the pressure of the booster fan, in Pa, is _____.
[rounded off to 2 decimal places]
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Open questionMNNAT2 marksNeeds review
Data related to a water turbine pump with backward bladed impellers are given below:
Impeller diameter : 35 cm
RPM : 1200
Angle of curvature of blade : 30°
Radial velocity of discharge : 2 m/s
Manometric efficiency : 0.8
The number of impellers required in the pump to lift water by a height 300 m is _____.
[rounded off to higher integer]
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