GATE MN topic:mineral-processing PYQs & Answers — Page 16

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Questions 151–160 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 16 of 65

Match the following features with the corresponding symbols.

Diagram for Mining Engineering question 21

Your answerChoose one option.

P → 1; Q → 3; R → 4; S → 2

P → 4; Q → 2; R → 1; S → 3

P → 2; Q → 4; R → 3; S → 1

P → 4; Q → 1; R → 2; S → 3

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If the major (

) and minor (

) principal stresses for a rock element have a relationship as

, the maximum shear stress is expressed by

Your answerChoose one option.

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The ore that is NOT used for commercial extraction of metal is

Your answerChoose one option.

Wolframite.

Dolomite.

Cassiterite.

Uranite.

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The function of District Mineral Foundation established by state governments in India, is to

Your answerChoose one option.

look after safety aspects of mining operations.

approve mining plan.

act as an environmental regulatory body.

monitor welfare of mining affected people.

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The percentage Fe and corresponding net value for an iron ore mine is given below:

Fe (%)	Net value (INR per tonne)
58	4000
62	4500

Assuming net value versus grade curve to be a straight line, and mining cost of waste is INR 1000 /m

, the correct representation of stripping ratio, SR (m

/tonne versus Fe (%) grade curve is

Your answerChoose one option.

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The magnitude of the curl of the vector

, is

Your answerChoose one option.

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An explosive with a density of 1.2 g/cm

has a heat of explosion equal to 900 cal/g. If the heat of explosion of ANFO with density of 0.8 g/cm

is 950 cal/g, the bulk strength of the explosive relative to ANFO is _____. (round off up to 2 decimals)

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A typical 24-hour activity of a mobile crusher plant is shown. The utilization, in %, of the plant, is_____. (round off up to 2 decimals)

Diagram for Mining Engineering question 28

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A coal washery discharges 300 m

/day of contaminated water in a stream having a flow rate of 0.04 m

/s. The DO level of the stream and the contaminated water are 8.5 mg/L and 4 mg/L, respectively. Neglecting the impact of temperature, the resultant DO, in mg/L, of the stream just after mixing is ______. (round off up to 2 decimals)

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The combined sound pressure level measured at a point in a production bench due to one dumper and one shovel is 95 dB(A). If the sound pressure level of shovel alone is 90 dB(A), the sound pressure level of the dumper alone, in dB(A), at the same point is________, (round off up to 2 decimals)

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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