S.E. (Civil) (Second Semester) EXAMINATION, 2012 SURVEYING (2008 PATTERN) Time : Three Hours Maximum Marks : 100

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1 Total No. of Questions 12] [Total No. of Printed Pages 8 Seat No. [4162]-108 S.E. (Civil) (Second Semester) EXAMINATION, 2012 SURVEYING (2008 PATTERN) Time : Three Hours Maximum Marks : 100 N.B. : (i) Answer three questions from Section I and three questions from Section II. (ii) Answers to the two Sections should be written in separate answer-books. (iii) (iv) (v) (vi) Neat diagrams must be drawn wherever necessary. Figures to the right indicate full marks. Your answers will be valued as a whole. Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. SECTION I 1. (a) What is meant by orientation in plane table survey? Explain method of orientation by the magnetic needle. [5] P.T.O.

2 (b) Find which station is free from local attraction and work out correct bearings : [8] Line F.B. B.B. AB ' 13 0' BC 39 30' ' CD 22 15' ' DE ' 60 45' EA ' ' Differentiate between declination and dip. The magnetic bearing of the sun at noon is '. Find out the declination. [5] 2. (a) The following bearings were taken with prismatic compass at the closed traverse : Line F.B. B.B. AB ' 300 BC CD ' ' DE ' 80 DA Find included angles and corrected bearings and record them in a tabular form. [8] [4162]-108 2

3 (b) State the advantages and disadvantages of plane table survey over other type of survey. [5] State the methods of plane table surveying. Explain in brief intersection method of plane table survey. [5] 3. (a) During a fly levelling operation the following observations were made : BS 0.650, 2.155, 1.405, 2.655, m FS 2.455, 1.305, 0.555, m The first backsight was taken on BM of R.L m. From the last backsight, it is required to set four pegs each at a distance of 30 m on a falling gradient of 1 in 100. Calculate the RLs of these four pegs and apply usual arithmetic check. [8] (b) Explain with the aid of a neat sketch, the working of Tilt compensator in auto level. [4] With neat sketch explain any four characteristics of contour lines. [4] 4. (a) With the help of neat sketch derive the expression for combined correction for curvature and refraction. [6] [4162] P.T.O.

4 (b) In testing a dumpy level, the following records were noted while undertaking reciprocal levelling : Instrument Reading at at A B A B is the line of collimation in adjustment? What should be the correct staff reading at A, during the second setup to make the line of collimation truly horizontal find the amount of collimation error also. [6] How do you estimate the volume storage capacity of a reservoir behind a dam? [4] 5. (a) State different errors eliminated by measuring the horizontal angle by repetition. [4] (b) The following observations were taken from station P & Q : Line Length (m) Bearings PA S 60 30' W PQ N 30 30' E QB N 50 15' W Calculate the length and bearing of AB and also the angle PAB and QBA. [8] [4162]-108 4

5 Define the following terms : [4] (i) (ii) (iii) (iv) Latitude Departure Consecutive co-ordinates Independent co-ordinates. 6. (a) The following table gives the latitude and departures of the sides of a closed traverse ABCD : Side Latitude Departure (m) (m) AB BC CD DA Find out the total co-ordinates and area of the traverse by assuming the total co-ordinates of A as (200, 100). [6] (b) Explain closing error in the traverse survey in detail. [6] State and explain transit rule. [4] [4162] P.T.O.

6 SECTION II 7. (a) State the situations where tacheometric survey is carried out. Explain second method of determination of constant of tacheometer in the field. [6] (b) Enlist the fundamental axes of theodolite. State the relation between the fundamental lines when transit is in perfect adjustment. [6] The following observations are made on a vertically held staff with a tacheometer fitted with an anallatic lens. The multiplying constant of the instrument was 100 : [6] Inst Stn. Staff Station Vertical Angle Hair Readings Remarks 0 BM 4 30' R.L of P ' BM = m Find RL of point P. 8. (a) Explain how you will test and adjust the transit theodolite to ensure that the horizontal plate bubble tube perpendicular to the vertical axis. [6] [4162]-108 6

7 (b) The following observations are made on a vertically held staff with a tacheometer fitted with an anallatic lens. The multiplying constant of the instrument was 100 : [6] Inst. Staff Vertical Hair Readings Remarks Stn. Station Angle 0 P +4 30' RL of point P Q ' = m Find the distance OQ and level difference between P and Q. Explain detailed procedure of carrying out radial survey. (Use sketch and RL s). [6] 9. (a) Define curve. State different types of horizontal circular curves. Explain compound curve. [6] (b) Two straight intersects at a chainage of 2700 m. The deflection angle being 36. A circular curve of 350 m radius is to be set out by method of offset from long chord. Calculate the chainage of tangent points and the value of offset at mid-point 30 m and 60 m, peg interval 30 m. [6] What is transition curve? Explain objects of providing transition curve. [4] [4162] P.T.O.

8 10. (a) Draw sketch of circular curve and define different elements of circular curve. [6] (b) Calculate and tabulate data necessary for setting out a 5 curve by tangential deflection angle method between two tangent lines BA and BC produced with the following data. Included angle ABC = 144, chainage of B is m, Peg interval 30 m. [6] Draw an illustrative sketch of compound curve and show its elements. [4] 11. (a) Explain with neat sketch step by step procedure of setting out a building. [6] (b) Write a short note on construction survey. [5] Explain the principle used in total station. Classify different types of total stations based on range. [5] 12. (a) Explain horizontal and vertical control in construction survey. State steps in road survey. [6] (b) Write a short note on survey of drainage line. [5] What is total station? State uses of total station. [5] [4162]-108 8