GATE MN exam:gate PYQs & Answers — Page 49

Questions 481–490 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 49 of 65

A low-grade deep-seated ore body dipping at 70° has a strike length of 2 km, and width of 100 m. The ore body and wall rocks are weak and fractured. The preferred method of mining is

Your answerChoose one option.

shrinkage stoping

cut-and-fill stoping

block caving

room and pillar stoping

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If the figures A and B represent contour plots in a terrain, then the correct statement is

Diagram for Mining Engineering question 17

Your answerChoose one option.

Fig. A shows ridge and Fig. B shows valley

Fig. A shows anticline and Fig. B shows syncline

Fig. A shows syncline and Fig. B shows anticline

Fig. A shows valley and Fig. B shows ridge

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The availability of water in the root zone for plant use is maximum in the case of

Your answerChoose one option.

sand

loam

clay

gravel

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If the time to failure of a machine component is exponentially distributed, the reliability of the same at Mean Time To Failure (MTTF), (rounded off to three decimal places), is __________.

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The major and minor principal stresses at a point are 25 MPa and -5 MPa respectively. The maximum shear stress, in MPa at that point is ______.

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For a function

and

. Ignoring all higher order terms in Taylor series, the value of the function at

(rounded off to two decimal places) is __________.

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Proximate analysis of a coal sample gives 2.46% moisture, 25.73% volatile matter, and 42.89% ash. The volatile matter of the coal sample, in percentage, on dry ash free (daf) basis (rounded off to two decimal places) is __________.

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A coarse sand aquifer has porosity 20% and hydraulic conductivity

m/s. If the hydraulic gradient is 0.00423 (m/m), then the average linear velocity of the groundwater in mm/s, (rounded off to three decimal places) is __________.

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In a slake durability test, mass of the drum with samples before the test and mass of the drum with oven-dried samples after the test are 1.52 kg and 1.48 kg respectively. If the mass of the drum is 1.05 kg, slake durability index in percentage (rounded off to two decimal places) is __________.

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The ionic concentration of a mine water sample with pH close to 7.0 is given below. The alkalinity of the water expressed as equivalent CaCO

, in mg/l, (rounded off to two decimal places) is __________.

Cations	mg/l	Anions	mg/l
Ca	95.0	HCO	160.0

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GATE MN exam:gate PYQs

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