Mining Engineering
GATE MN year:2017 PYQs
Build your understanding with focused practice from past exam papers.
Questions 11–20 of 65. Imported answers require independent review unless marked reviewed.
Question 11
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Semi-variogram modeling is used for reserve estimation of mineral deposit by
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Which one of the following does NOT belong to the direct operating cost of a mine?
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Lane's algorithm is applied to determine
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In an underground coal mine a driller, wearing personal protective equipment, was going to workplace along the traveling roadway. A piece of rock fell down from the roof and hit the person on head causing serious injury. The cause of accident is
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In a PERT network, the “time estimates” of an activity are the following: Optimistic time - 2 days, Most likely time - 4 days, and Pessimistic time - 12 days. The expected time and standard deviation of the activity in days are respectively
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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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