Mining Engineering
GATE MN format:mcq PYQs
Build your understanding with focused practice from past exam papers.
Questions 221–230 of 348. Imported answers require independent review unless marked reviewed.
Question 10
Open questionGAMCQ2 marksNeeds review
The profit shares of two companies P and Q are shown in the figure. If the two companies have invested a fixed and equal amount every year, then the ratio of the total revenue of company P to the total revenue of company Q, during 2013 - 2018 is_____.
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The eigenvalues of the matrix
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For the electric delay detonator shown in the figure, the components P, Q and R, respectively, are
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Match the following safety arrangements for a surface-to-underground shaft hoist with their corresponding safety functions.
Hoisting safety arrangement | Safety function |
|---|---|
P — Detaching hook | 1 — Over-winding safety on surface |
Q — Narrowing rigid guides | 2 — Resting cage |
R — Keps | 3 — Over-winding safety at underground |
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The fore bearings and back bearings of the lines of an open compass traverse are given below.
Line | Fore bearing | Back bearing |
|---|---|---|
PQ | 132°30′ | 313°30′ |
QR | 123°30′ | 303°30′ |
RS | 182°30′ | 2°15′ |
ST | 288°45′ | 108°0′ |
The stations that are free from local attraction are
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The plane stress condition is given by
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Match the following metals with their corresponding minerals.
Metal | Mineral |
|---|---|
P — Copper | 1 — Galena |
Q — Tungsten | 2 — Sphalerite |
R — Lead | 3 — Chalcopyrite |
S — Zinc | 4 — Wolframite |
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Match the wire rope types with their corresponding cross-sectional diagrams.
Rope type | Diagrams |
|---|---|
P — Round strand | 1 — diagram 1  |
Q — Half-locked coil | 2 — diagram 2  |
R — Flattened strand | 3 — diagram 3  |
S — Full locked coil | 4 — diagram 4  |
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The ‘ratchet and pawl’ mechanism in a jack hammer drill
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Post-pillar method of stoping is a variant of
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