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GATE 2023 Surveying Quiz 59

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Question 1

The staff readings, taken with a tacheometer, are 0.850m, 1.170m, and 1.525 m. Determine the horizontal distance from the instrument station to staff if K=100 and C = 0.20m. If the RL. of instrument station is 101.5m and height of trunnion axis is 1.36m, then RL. of the staff station is

Question 2

In a tangential method of tacheometry two vanes were fitted 2m apart, the lower vane being 0.5m above the foot of the staff held, vertical at station B . The vertical angles measured were + 1° 12’ and – 1°30’. The horizontal distance and RL at B, is__________. (Height of the line of collimation is 100 m)

Question 3

Two distances of 20m and 100m were accurately measured, and the staff's corresponding intercepts between the outer stadia webs were 0.196m at the former distance and 0.996 m at the latter. The tachometric constants are…………. And ………….. (Assume horizontal line of sight and staff is held.)

Question 4

Calculate the horizontal distance between the staff & the instrument if the staff readings are 1.8 m and 3.4 m which corresponds to lower & upper horizontal lines of cross hair. (Assume lens of tachometer is anallactic lens){In integer}

Question 5

Determine the distance between instrument station X and the staff station Y when staff readings are 1.231m, 0.823m & 0.350m. RL. of line of collimation is 200.150m and vertical angle is (- 4 ̊45). Also determine the RL. Of ‘Y’. Take K=100 and C =0.8.

Question 6

A tachometer is used to measure the two distances, 40 m and 160 m, such that the intercepts of the staff between the outer stadia wires were 0.215 m and 0.875 m, respectively. Then the product of multiplying constant and additive constant will be____ (Round of to 2 decimal places)
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Jul 7ESE & GATE CE