Mining Engineering
2026 · Paper 1
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Complete GATE MN 2026 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 43–45 of 65. Imported answers require review unless explicitly marked reviewed.
Question 43
Open questionMNMCQ2 marksNeeds review
The in-situ stresses are determined by Flat-jack method by making three slots (P, Q, and R) on the wall (ABCD) of a mine gallery as shown. The in-situ stresses
,
, and
are determined at slot-P, slot-Q, and slot-R, respectively. If
and
, the shear stress on the wall is 
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Open questionMNMCQ2 marksNeeds review
The observations from a correlation survey are shown. If the coordinates of points C and D are (East: 375 m, North: 120 m) and (East: 376 m, North: 121 m), respectively, the whole circle bearing of the line EF is
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 45
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A closed-circuit self-contained breathing apparatus (SCA) contains 2 liters of O
at 200 bar. If a miner consumes O
at a rate of 2 liters min
, the maximum duration that the apparatus can supply O
, in min, is ____________. (answer in integer)Log in to check the answer
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