GATE MN topic:mineral-processing PYQs & Answers — Page 56

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Questions 551–560 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 56 of 65

For the conveyor belt drive shown, the tension on the tight side (

) is double that of the slack side. The coefficient of friction between belt and drum is 0.21. The minimum angle of lap (in degree) to avoid slippage of the belt is ____________.

Diagram for Mining Engineering question 21

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In a bord and pillar development district, 6 headings driven along the strike direction are surrounded by panel barriers on the dip and rise sides. The maximum possible number of faces for the panel is ____________________.

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A roadway in a mine, a single light source as shown, emits light uniformly in all directions. The floor level illumination at station A is 20 lux. The floor level illumination at a point B in lux is ________________.

Diagram for Mining Engineering question 23

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A system of two identical components connected in series has reliability of 0.25. The reliability of each component is ______________.

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The operational status of an HEM in a shift is shown in the diagram. The availability of the machine in % is ____________________.

Diagram for Mining Engineering question 25

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is a constant, the solution of the differential equation

Your answerChoose one option.

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Match the following blasting elements with the corresponding initiators.

Blasting Elements: P Electric detonator; Q Safety fuse; R Detonating fuse; S Non cap-sensitive explosive.

Initiators: 1 Match stick; 2 Booster; 3 Exploder; 4 Ordinary detonator

Your answerChoose one option.

P-2, Q-3, R-4, S-1

P-3, Q-1, R-4, S-2

P-3, Q-1, R-2, S-4

P-1, Q-4, R-2, S-3

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The following plot is developed for a rock type after a series of triaxial tests. The uniaxial compressive strength and tensile strength of the rock type, respectively, in MPa, are

Diagram for Mining Engineering question 28

Your answerChoose one option.

30, 5

30, 6

24, 6

24, 5

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Match the following in the context of environmental management.

Technique: P Mulching; Q Aeration; R Wet-scrubbing; S Silencer.

Purpose: 1 Dust control; 2 Noise control; 3 Soil conservation; 4 Waste water treatment

Your answerChoose one option.

P-1, Q-4, R-3, S-2

P-3, Q-1, R-4, S-2

P-4, Q-3, R-1, S-2

P-3, Q-4, R-1, S-2

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A panel in coal mine produces 400 tonne per day. The number of persons employed in each of the three shifts is 110, 130 and 120. As per CMR, the minimum quantity of air that needs to be circulated at the last ventilation connection of the panel in

Your answerChoose one option.

780

900

1000

2400

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GATE MN topic:mineral-processing PYQs

Question 21

Question 22

Question 23

Question 24

Question 25

Question 26

Question 27

Question 28

Question 29

Question 30