Mining Engineering
GATE MN format:mcq PYQs
Build your understanding with focused practice from past exam papers.
Questions 121–130 of 348. Imported answers require independent review unless marked reviewed.
Question 19
Open questionMNMCQ1 markNeeds review
A linear programming problem is given as:
Maximize
Subject to:
The problem hasYour answerChoose one option.
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A tabular, near-flat (dip < 30°), and less than 2 m thick copper orebody having erratically located grade is to be mined underground. Wall rock and orebody are competent. The most suitable mining method is
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x and y are functions of independent variables
and
as given below
The Jacobian of x, y isYour answerChoose one option.
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In project scheduling techniques, the CORRECT statement is
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As per DGMS guidelines, the risk score in Safety Management Plan for a hazard is computed as
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Open questionMNMCQ1 markNeeds review
Match the following items with their respective contours
Item | Contour |
|---|---|
(P) Isopachs | (1) slope |
(Q) Isotherms | (2) thickness |
(R) Isocline | (3) temperature |
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In an astronomical survey at a given station, the pole star is located at an angle of 27° from the horizon. The latitude of the survey station in degrees is
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The position tracking of a point by GPS is based on the technique of
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Matrix A is negative definite. Which one of the following is NOT the correct statement about the matrix?
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Open questionMNMCQ2 marksNeeds review
In a quality control process of coal supplied to a thermal plant, the 3-sigma control limits for fixed carbon (FC) are defined by 40% ± 15%. The process is termed “out of control” if:
Rule 1: 4 out of 5 successive values of FC are situated at the same side of the mean and at a distance more than 1 standard deviation.
Rule 2: Any one value crosses any of the 3-sigma control limits.
For the following continuous data of FC (%): 49, 51, 56, 20, 46, 48, 47, 49, 45, 41, 42, 40, the process is
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