Mining Engineering
2019 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE MN 2019 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 49–51 of 65. Imported answers require review unless explicitly marked reviewed.
Question 39
Open questionMNNAT2 marksNeeds review
A set of tubs is pulled by a 15 tonne diesel locomotive at a gradient of 1 in 100 with an acceleration of 0.05 m/s
. The coefficient of adhesion between the wheel and the track is 0.2 and the frictional resistance coefficient is 0.01. The maximum mass, in tonne, the locomotive can pull (rounded off to one decimal place) isLog in to check the answer
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Open questionMNNAT2 marksNeeds review
The characteristic curves of two mine fans installed in series in a fan drift are
and
where P is pressure in Pa and Q is quantity in m
/s. If the mine quantity is 70 m
/s, the mine resistance, in Ns
m
(rounded off to two decimal places) isLog in to check the answer
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Open questionMNNAT2 marksNeeds review
Three equipment A, B, and C located side by side and operating simultaneously produce a sound power level of 77.5 dB. The sound power levels of A and B are 68 dB and 70 dB respectively. The sound power level of C (rounded off to one decimal place) in dB, is
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