Mining Engineering
2021 · Paper 1
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Complete GATE MN 2021 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 54
Open questionMNNAT2 marksNeeds review
A coal mine operating in three shifts produces 400 tonnes of coal per day with a face OMS of 1.0 from panel A, and 200 tonnes of coal with face OMS of 1.0 from panel B. The panel A and panel B are in parallel with resistance 0.6 Ns²m⁻⁸ and 0.5 Ns²m⁻⁸, respectively. If the panels are supplied with minimum permissible quantity as per CMR 2018, the required regulator resistance to meet the conditions in Ns²m⁻⁸ is ______. [round off to 2 decimal places]
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Open questionMNNAT2 marksNeeds review
A set of three steel bars of equal cross-sectional area of 0.01 m² are loaded, as shown in the figure. The elastic modulus of steel is 200 GPa. The overall change of length of the complete set of bars, in mm, is ______. [round off to 3 decimal places]
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