GATE MN kind:question PYQs & Answers — Page 23

Questions 221–230 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 23 of 65

The position tracking of a point by GPS is based on the technique of

Your answerChoose one option.

Graphical resection.

Analytical resection.

Triangulation.

Trilateration.

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Matrix A is negative definite. Which one of the following is NOT the correct statement about the matrix?

Your answerChoose one option.

It is symmetric.

Determinant of A is always less than zero.

All the eigen values are less than zero.

Trace of A is always less than zero.

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The average ore grade of a copper deposit is 0.9%. The recovery of the metal after processing, smelting and refining is 85%. If the selling price of refined copper is Rs 640/kg, the sale value in Rs. from mining one tonne of ore is_____. [rounded off to 1 decimal place]

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A slope stability radar shows that the position of a point P in a mine dump shifts from (200, 700, −60) m to (200.05, 700.1, −60.75) m over a time

. The net displacement in cm of the point P is_____. [rounded off to 2 decimal places]

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A Mohr-Coulomb failure envelope of a sandstone rock is given as

where

and

, measured in MPa, are the major and minor principal stresses respectively. The angle of the failure plane with the

axis in degree is_____. [rounded off to 1 decimal place]

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A punch hole of diameter 10 mm is to be made in a 5 mm thick rock plate as shown. If the yield strength of rock plate is 25 MPa, the punch force P required in kN is _____. [rounded off to 1 decimal place]

Diagram for Mining Engineering question 31

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‘Critical subsidence’ has occurred on the surface due to mining of a flat longwall panel at a depth of 200 m. The width of the panel is 150 m. The maximum width of the panel in m that can be mined at a depth of 300 m, to reach critical subsidence is_____. [rounded off to 1 decimal place]

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To increase the resistance of a mine roadway by 1.5 Ns² m⁻⁸, the size in m² of the regulator to be installed is _____. [rounded off to 2 decimal places]

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A coal seam of 3.0 m height is mined with a double-ended range drum shearer (DERDS) for a web depth of 0.5 m. The coal density is 1.4 tonne/m³. If the panel width is 150 m, the production per cycle in tonne is______. [rounded off to 1 decimal place]

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In a panel with 50 workers, a miner typically consumes 2.5 × 10⁻³ m³/min of oxygen. The percentage of oxygen in the intake air is 20.95%. To ensure minimum permissible oxygen in the return air as per CMR 2017 the quantity of ventilation air in m³/min to be supplied to the panel is_____. [rounded off to 2 decimal places]

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GATE MN kind:question PYQs

Question 26

Question 27

Question 28

Question 29

Question 30

Question 31

Question 32

Question 33

Question 34

Question 35