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Surveying - 1 - May 2014
Civil Engineering (Semester 3)
TOTAL MARKS: 80
TOTAL TIME: 3 HOURS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks.
Attempt any five
1 (a) Explain Reciprocal Ranging.(4 marks)
1 (b) What is offset? Explain types along with limiting length of offset.(4 marks)
1 (c) Characteristics of contour.(4 marks)
1 (d) Explain with neat sketch Dip and Declination.(4 marks)
1 (e) Compare 'Prismatic compass and Surveyor's compass.(4 marks)
1 (f) Horizontal angle measurement by Reiteration method using
Theodolite.(4 marks)
2 (a) The following offsets were taken from a chain line to a Hedge:
Distance in “m” | 0 | 20 | 40 | 60 | 80 | 120 | 160 | 200 | 240 | 270 | 300 |
Offsets in “m” | 24 | 20 | 16 | 12 | 8 | 10 | 14 | 16 | 20 | 22 | 26 |
Calculate the area enclosed by chain line, the hedge and. the end offset by
i) Simpson's Rule
ii) Trapezosdal Rule.(10 marks) 2 (b) Explain why zero is marked at South in Prismatic compass ? and why East and West are interchanged in surveyor's compass.(6 marks) 2 (c) Describe temperory adjustments of compass.(4 marks) 3 (a) The following bearings were observed an open traverse, correct them where necessary for local attraction :
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Line | AB | BC | CD | DE |
F.B. | 154° | 205° 40' | 140° | 69° 38' |
B.B. | 334° 40' | 23° 38' | 321° 22' | 249° 38' |
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Instrument Station |
Staff reading on | Remarks | |
A | B | ||
A | 1.029 | 1.634 |
Distance between A and B=800m. |
B | 0.943 | 1.542 | Rt. of A=421.543m. |
Find:- i) The true RL of B, ii) Combined corrections for curvature and refraction. Iii) The error collimation adjustment of the instrument.(8 marks) 4 (b) Explain Orientation alongwith different methods of orientation in plane table surveying.(8 marks) 4 (c) Define
i) Arbitrary meridian.
ii) True merdian
iii) Permanent BM
iv) Line of Collimation.(4 marks) 5 (a) Determine the elevations of hilltop; from following data;
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Instrument Station | Staff reading On B.M. | Vertical angleon target at hilltop | RL of BM (m) |
O1 | 1.670 | 28° 42' | 345.58 |
O2 | 2.55 | 18° 6' | 345.58 |
The height of target A was 5.0m. The instrument stations were 100m apart and were in line with the target A.(6 marks) 5 (b) Given the following latitude and departures of the sides of traverse ABCDE,the length of CD have been omitted. Compute the length of CD for above closed traverse. Draw traverse:
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Sr No | Line | Length | Bearing | Latitude | Departure |
1 | AB | 217.5 | S 59° 45'E | -109.578 | +187.872 |
2 | BC | 308 | Due North | ? | ? |
3 | CD | ? | N 37° 36'W | ? | ? |
4 | DE | 283.5 | S 55° 18'W | -161.397 | -233.07 |
5 | EA | 173.15 | S 2° 40'W | -172.989 | -8.055 |
Attempt any four
6 (a) Balancing BS and FS.(5 marks) 6 (b) Zero circle.(5 marks) 6 (c) Spire test.(5 marks) 6 (d) Traversing method of plane table survey.(5 marks) 6 (e) Balancing of traverse.(5 marks)