Mining Engineering
GATE MN format:mcq PYQs
Build your understanding with focused practice from past exam papers.
Questions 231–240 of 348. Imported answers require independent review unless marked reviewed.
Question 10
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‘Cross-measure borehole method’ is used for
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The dry and wet bulb temperatures at the inlet of the airstream are 30 °C and 25 °C, respectively. The corresponding values at the outlet of the airstream are 26 °C and 25 °C, respectively. The psychrometric process that occurs in the airstream is described as
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For a mixture of inflammable gases, the lower and upper explosibility limits can be computed using
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The code for the lowest category of mineral resources under United Nations Framework Classification (UNFC) system is
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Match the following sampling patterns with the corresponding sampling types.
Sampling patterns: P, Q, R, S
Sampling Pattern | Sampling Type |
|---|---|
P | 1 — Regular |
Q | 2 — Biased |
R | 3 — Stratified random |
S | 4 — Random |
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In the context of gas testing using flame safety lamp, the correct statement is
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For
, the value of
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For the differential equation
, assuming the constant of integration to be
, the general solution isYour answerChoose one option.
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A belt-drive used for power transmission between two parallel shafts has a belt of mass 1.2 kg/m, and the maximum allowable belt tension is 2250 N. If the centrifugal tension is one third of the maximum allowable belt tension, the speed at which maximum power is transmitted by the belt, in m/s, is
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An air receiver of a compressor, having volume 0.5 m
, supplies air for charging ANFO in drill holes. During the charging process the absolute pressure of the air receiver falls from 900 kPa to 700 kPa. Assuming the entire process is isothermal, the volume of air supplied by the receiver at 100 kPa ambient pressure, in m
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