Mining Engineering
GATE MN format:mcq PYQs
Build your understanding with focused practice from past exam papers.
Questions 31–40 of 348. Imported answers require independent review unless marked reviewed.
Question 38
Open questionMNMCQ2 marksNeeds review
Given
,
,
and
If
with
and
, the value of
isYour answerChoose one option.
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Open questionMNMCQ2 marksNeeds review
Match the type of rock with its metamorphic form.
Igneous/Sedimentary rock | Metamorphic rock |
|---|---|
(P) Shale | (1) Gneiss |
(Q) Limestone | (2) Quartzite |
(R) Granite | (3) Marble |
(S) Sandstone | (4) Slate |
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Open questionMNMCQ2 marksNeeds review
In an underground coal mine, the air quantities
and
pass through ventilation districts A and B, respectively as shown, with a pressure drop of
across them. The air quantity in district B is to be increased to
by installing a booster fan, as shown, without affecting the air quantity in ventilation district A. The capacity of booster fan (
) can be expressed as 
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Open questionMNMCQ2 marksNeeds review
Match the shaft sinking method with its applicability.
Shaft sinking method | Applicability |
|---|---|
(P) Piling system | (1) Strata consisting of alternate strong and loose soil, and drum sinks down by its own weight |
(Q) Caison method | (2) Sinking through the loose ground near the surface |
(R) Cementation | (3) Heavily watery strata, including quick sand |
(S) Freezing | (4) Fissured water bearing strata without running sand |
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Open questionMNMCQ2 marksNeeds review
A shovel needs to be selected from four models of different capacities, S1 to S4, for loading of dumpers. The operational data for the shovel-dumper combination are provided. The mean arrival rate of the dumpers at the loading point is 5 per hour and the waiting cost of dumper is ₹ 200 per hour. The inter-arrival time of dumpers and loading time of shovel follows exponential distribution. Ignoring the shovel hiring cost, the shovel type that will have minimum total cost (waiting and operating cost) is
Model | Operating cost of shovel (₹ per hour) | Mean loading rate of shovel (number of dumpers per hour) |
|---|---|---|
S1 | 80 | 8 |
S2 | 85 | 9 |
S3 | 90 | 10 |
S4 | 100 | 11 |
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Open questionMNMCQ2 marksNeeds review
The in-situ stresses are determined by Flat-jack method by making three slots (P, Q, and R) on the wall (ABCD) of a mine gallery as shown. The in-situ stresses
,
, and
are determined at slot-P, slot-Q, and slot-R, respectively. If
and
, the shear stress on the wall is 
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The observations from a correlation survey are shown. If the coordinates of points C and D are (East: 375 m, North: 120 m) and (East: 376 m, North: 121 m), respectively, the whole circle bearing of the line EF is
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 1
Open questionGAMCQ1 markNeeds review
Even though I had planned to go skiing with my friends, I had to _________ at the last moment because of an injury.
Select the most appropriate option to complete the above sentence.
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Open questionGAMCQ1 markNeeds review
The President, along with the Council of Ministers, __________ to visit India next week.
Select the most appropriate option to complete the above sentence.
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Open questionGAMCQ1 markNeeds review
An electricity utility company charges ₹ 7 per kWh (kilo watt-hour). If a 40-watt desk light is left on for 10 hours each night for 180 days, what would be the cost of energy consumption? If the desk light is left on for 2 more hours each night for the 180 days, what would be the percentage-increase in the cost of energy consumption?
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