GATE MN topic:mineral-processing PYQs & Answers — Page 3

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Questions 21–30 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 3 of 65

A simply supported beam is shown. The location at which the zero shear force is acting on the beam is

Diagram for Mining Engineering question 21

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In a Slake Durability Index (SDI) test, a rock sample of 500 g undergoes two standard cycles of wetting and drying. The mass of the sample retained after the test is 400 g. The SDI of the sample, in %, is

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Results from the permeability test of rock samples, E, F, and G are shown. The correct order of hydraulic conductivity (k) of the rock samples is

Diagram for Mining Engineering question 23

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The ideal load – deformation characteristic curve of a hydraulic prop is

Diagram for Mining Engineering question 24

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A 20 m thick orebody is dipping at an angle of 75°. The orebody and host rock are strong. It is proposed to deploy a 150-200 mm diameter drill for production. The suitable stoping method is

Your answerChoose one option.

block caving

long hole stoping

shrinkage stoping

post and pillar stoping

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A gradually expanding duct fitted to the outlet of an exhaust fan is known as

Your answerChoose one option.

chimney

diffuser

evasee

equivalent orifice

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The cobweb-like appearance in the radiograph of the lung of a miner can be diagnosed as

Your answerChoose one option.

silicosis

asbestosis

talcosis

coal workers’ pneumoconiosis

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In firedamp explosion, the methane concentration in the stoichiometric methane-air mixture, in % by volume, is

Assume the air contains 79 % nitrogen and 21 % oxygen, by volume.

Your answerChoose one option.

5.4

9.5

10.8

14.8

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Which of the following statements about Fourier series is/are correct?

Your answerSelect all correct options. You can choose more than one.

The Fourier series of an even function contains only cosine terms

The Fourier series of an odd function contains only cosine terms

The Fourier series of an odd function contains only sine terms

The Fourier series of an even function contains only sine terms

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A circular curve having radius of curvature 1000 m is set out by connecting two straights with a deflection angle of 60°. The apex distance, in m, is ____________. (rounded off to three decimal places)

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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