Mining Engineering
GATE MN kind:question PYQs
Build your understanding with focused practice from past exam papers.
Questions 601–610 of 650. Imported answers require independent review unless marked reviewed.
Question 16
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The magnetic bearing of a line is 65°30′. If the declination is 4°30′ W, the true bearing of the line in degrees is ________
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A vertical photograph of a 40 m high hill is taken from 4.4 km height. If the focal length of the camera is 15 cm, the scale of the photograph is ________
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The operating conditions of a rotary rock drill are: applied thrust: 6.75 kN, revolution: 180 rpm, and penetration rate: 0.15 m/min. The work done per revolution in N-m is ________
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The Absolute amount of energy and density of a booster and ANFO are given below.
Explosive type | Energy (cal/g) | Density (g/cc) |
|---|---|---|
Booster | 680 | 1.25 |
ANFO | 912 | 0.81 |
The Relative bulk strength of booster is ________
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A deeply seated ore body dips at 70° having an average width of 60 m. The ore body, hanging wall, and footwall are competent. The suitable stoping method for this ore body is
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The results of the crossing point temperature experiments for coal A and B are shown in the figure.
The correct interpretation of the plot is that
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The “yellow boy” formed due to acid mine drainage mainly consists of
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A double ended ranging drum shearer is employed in a longwall mine of face length 150 m. The mining height is 3.5 m and depth of the web cut is 0.76 m. The cycle time for unidirectional cutting is 40 min. Considering bulk density of the coal to be 1.4 t/m
, hourly production from the face in tonne is ________Log in to check the answer
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The strength of a stranded wire rope is proportional to
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A 20 m thick and 30 m wide confined aquifer has two monitoring wells spaced 500 m apart along the direction of groundwater flow. The difference in water level between the wells is 2 m. The hydraulic conductivity is 50 m/day. The rate of flow in m³/day is
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