GATE MN topic:mining PYQs & Answers — Page 55

Questions 541–550 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 55 of 65

The significance of ‘potentially explosive mixture’ in Coward flammability diagram is -

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leakage of fresh air may lead to explosive condition for the mixture

leakage of firedamp may lead to explosive condition for the mixture

increase in the ambient temperature may lead to explosive condition for the mixture

introduction of a source of ignition may result in explosion of the mixture

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Considering ‘I’ as ‘intake’ and ‘R’ as ‘return’, the ventilation symbol for the shaft-bottom air-lock in a coal mine is

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Diagram for Mining Engineering question 12

Diagram for Mining Engineering question 12 (figure 2)

Diagram for Mining Engineering question 12 (figure 3)

Diagram for Mining Engineering question 12 (figure 4)

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From a coal seam of a mine 100 tonnes of coal is produced per day. The seam has inflammable gas emission rate of 1400 m

per day. Percentage of inflammable gas in general body of air is 0.14. The gassiness of the seam is

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Degree IV

Degree III

Degree II

Degree I

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The temperature profiles and the plume patterns that are most likely to result are given in the figures. The dotted line represents ‘adiabatic lapse rate’ and the bold line represents ‘environmental lapse rate’. The WRONG combination is

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Diagram for Mining Engineering question 14

Diagram for Mining Engineering question 14 (figure 2)

Diagram for Mining Engineering question 14 (figure 3)

Diagram for Mining Engineering question 14 (figure 4)

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The inventory pattern shown does NOT represent the following.

Diagram for Mining Engineering question 15

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Inventory is replenished instantaneously

Demand decreases with time

Shortage is not permitted

Demand is uniform

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The figure depicts a transportation problem along with the solution. The correct statement is

Diagram for Mining Engineering question 16

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unbalanced problem, optimal solution

unbalanced problem, sub-optimal solution

balanced problem, optimal solution

balanced problem, sub-optimal solution

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The degree of the differential equation

is ______________.

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The slope of the line connecting the points (20, 6) and (40, 8) is ______________.

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Two contours of RL 60 m and 70 m are separated by 34 m measured along dip of the seam. The dip of the seam in degree is ______________.

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The RL of the initial station is 200 m. If

and

, then the RL of the last station in m is ____________.

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GATE MN topic:mining PYQs

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20