GATE MN Mine Surveying PYQs & Answers — Page 3

Questions 21–30 of 38. Imported answers require independent review unless marked reviewed.

For a dumpy level, the bubble tube has sensitivity of 40″ for one division. While taking a staff reading at a distance of 60 m, the bubble is out of centre by 2 divisions. The error in staff reading in mm is ______. [round off to one decimal place]

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On an old plan of scale 1:100, leasehold area of a mine is now measured as 802 cm² using a planimeter. The plan is found to have shrunk, such that the original line of 10 cm is now measured as 9.8 cm on the plan. True lease hold mine area, in m², is ______. [round off to the nearest integer]

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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

Your answerChoose one option.

P and Q

Q and R

R and S

S and T

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The following consecutive readings were taken at uniform intervals with a level and a levelling staff on continuously sloping ground.

0.405, 1.035, 1.654, 0.240, 0.615, 1.125, 0.800, 1.125

The number of change points is __________.

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The following figure represents the observations from the level survey of an underground gallery.

Diagram for Mining Engineering question 48

If the reduced level of station A is 100.0 m, the reduced level of station D in m is ________ (round off to 1 decimal place).

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A tacheometer was set up at station P and the following readings were taken at two stations A and B with the staff held vertical and the line of sight horizontal.

Line	Bearing	Staff intercept
PA	210°	1.2 m
PB	135°	1.4 m

The additive and multiplying constants of the tacheometer are 0 and 100, respectively. The length of AB in m is ________ (round off to 1 decimal place).

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The geometry of a simple planar curve (ADB) is shown below. The value of the mid-ordinate of the curve in m is ________ (round off to 1 decimal place).

Diagram for Mining Engineering question 50

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If the figures A and B represent contour plots in a terrain, then the correct statement is

Diagram for Mining Engineering question 17

Your answerChoose one option.

Fig. A shows ridge and Fig. B shows valley

Fig. A shows anticline and Fig. B shows syncline

Fig. A shows syncline and Fig. B shows anticline

Fig. A shows valley and Fig. B shows ridge

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Two points A and B are located 150 m apart in the East-West orientation on the bank of a river as shown in the figure. Considering a station C on the north bank the bearings of AC and BC are observed to be 42° and 35° respectively. The width of the river, in m, (rounded off to two decimal places) is

Diagram for Mining Engineering question 43

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An azimuth of 330° corresponds to a quadrant bearing of

Your answerChoose one option.

W60°N

N30°W

S30°W

S30°E

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GATE MN Mine Surveying PYQs

Question 39

Question 40

Question 4

Question 23

Question 48

Question 49

Question 50

Question 17

Question 43

Question 3