Mining Engineering
GATE MN topic:surface-environment PYQs
Build your understanding with focused practice from past exam papers.
Questions 21–26 of 26. Imported answers require independent review unless marked reviewed.
Question 29
Open questionMNMCQ2 marksNeeds review
Match the following in the context of environmental management.
Technique: P Mulching; Q Aeration; R Wet-scrubbing; S Silencer.
Purpose: 1 Dust control; 2 Noise control; 3 Soil conservation; 4 Waste water treatment
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Open questionMNNAT2 marksNeeds review
A person standing 50 m away from an HEM experiences 90 dB sound pressure level. If the person moves to a new location that is 70 m away from the HEM, the sound pressure level experienced by the person, in dB, becomes ____________________.
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Open questionMNMCQ1 markNeeds review
The “yellow boy” formed due to acid mine drainage mainly consists of
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Open questionMNMCQ1 markNeeds review
A 20 m thick and 30 m wide confined aquifer has two monitoring wells spaced 500 m apart along the direction of groundwater flow. The difference in water level between the wells is 2 m. The hydraulic conductivity is 50 m/day. The rate of flow in m³/day is
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Open questionMNNAT2 marksNeeds review
A stream flowing at 15 m³/s has a tributary feeding into it with a flow rate of 7 m³/s. The concentrations of chloride at the upstream of the junction and that of the tributary are 30 mg/L, and 50 mg/L respectively. Treating chloride as conservative substance and assuming complete mixing of two streams, the concentration of chloride in mg/L at the downstream is ________
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Open questionMNNAT2 marksNeeds review
A sample of mine water has 100 mg/L of
and 10 mg/L of
. The equivalent weights of
and
are 20 mg/meq and 12.2 mg/meq respectively. The hardness of mine water in unit of mg/L as CaCO₃ is ________Log in to check the answer
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