Mining Engineering
GATE MN purpose:exam-prep PYQs
Build your understanding with focused practice from past exam papers.
Questions 81–90 of 650. Imported answers require independent review unless marked reviewed.
Question 16
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The metal that belongs to Rare Earth Element category is
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The major (
) and minor (
) principal stresses and the maximum shear stress (
) are related as
The magnitude of normal stress on the plane where
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In a Brazilian test, the front view of a homogeneous rock sample is shown in the figure. The failure initiates at the point
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Three frictionless pulleys with rope attachment are in a static equilibrium as shown in the figure. The mass
and
, in kg, respectively are 
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Match the source of error with the corresponding correction in surveying with steel tape.
Source of error | Type of correction |
|---|---|
(P) Sag | (1) Only Positive (+) |
(Q) Temperature | (2) Only Negative (−) |
(R) Pull greater than standard pull | (3) Either positive or negative (+ or −) |
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The figure below shows four profiles of the environmental lapse rate. Given the dry adiabatic lapse rate = −10 °C/km, the atmosphere is highly unstable for the profile
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In a depillaring face of an underground coal mine, both wet and dry bulb temperatures are 30 °C. The relative humidity of the face environment, in percentage, is
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The chemicals used in a foam type fire extinguisher are
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Pressure head characteristic of a mine fan and a mine characteristic curves are shown in figure below:
Point | Nomenclature |
|---|---|
P | 1: Stall point |
Q | 2: Operating point |
R | 3: Theoretical shut-off head |
Match the points with their corresponding nomenclatures
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As per CM 2017, haulage ropes shall be recapped once at least in every
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