Mining Engineering
2021 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE MN 2021 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 28–30 of 65. Imported answers require review unless explicitly marked reviewed.
Question 18
Open questionMNMCQ1 markNeeds review
The CORRECT curve showing the relationship between vertical stress on a coal pillar and extraction ratio of a bord and pillar panel in a horizontal seam is
Your answerChoose one option.
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Given impeller diameter
, speed of rotation
and air density
, for geometrically similar fans, the fan pressure is proportional toYour answerChoose one option.
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Open questionMNNAT1 markNeeds review
A coal sample having moisture content of 8.0% has unit weight 15.6 kN/m³. The dry unit weight of the sample, in kN/m³ is _____. [round off to 2 decimal places]
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