VTU Civil Engineering (Semester 4)
Surveying 2
May 2016
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

1(a) Differentiate between the following terms :
i) Transiting and swinging of telescope.
ii) The upper plate and the lower plate.
iii) Face left and face right observations.
6 M
1(b) List the miscellaneous operations that can be performed with a transit theodolite and explain the method of measuring the magnetic bearig of a line.
4 M
1(c) Explain the procedure for measured of horizontal angles by the mehod of reiteration.
6 M

2(a) Mention the permanent adjustments of theodolite and explain the spire test used in the permanent adjustment of a theodolite.
10 M
2(b) The following observations when taken during the testing of a dumpy level:
 Instrument at staff reading on A B A 1.615 2.325 B 2.200 3.175

i) Is the instrument in adjustment?
ii) To what reading should the line of collimation be adjusted, when the instrument at B.
iii0 If the RL of A is 238.00 m, what should be the RL of B?
10 M

3(a) Derive the expression for horizontal distances, height ad RL of an elevated object by double plane method, when the base is inaccessible.
8 M
3(b) Mention the advantages of total over the concentional instruments.
2 M
3(c) Find the elevation of top of the tower from the following data:
 Instrument station Rdg on Big Angle of eleation Remarks A 0.862 18*36' RL of BM = 421.38 B 1.222 10*12' Distance AB = 50m

Stations A, B and tower are in the same vertical plane.
10 M

4(a) Derive the standard tacheometric expression for the horizontal distance with usual notations.
6 M
4(b) Write short notes on the following:
i) Anallactic lens. ii) Beaman's stadia arc. Iii) Tacheometric constants.
6 M
4(c) A tacheometer fitted with a anallactic lens was set up at station D with the following observations. K = 100
 Station Sighted Bearing Staff rdg Verticle Angle A 330°20' 1.255, 1.860, 2.465 +12*12' B 20°36' 1.30, 1.885, 2.47 +10*36'

Calculate the RL of A and B and also gradient from A to B. RL of instrument axis = 150 m.
8 M

5(a) What are the different mehods of setting out a simple curve? Explain the procedure for setting out a simple curve by offsets from chords produced.
10 M
5(b) Two straight lines having a total deflection angle of 76° are to be connected by a compound curve. The radius of first arc is 500 m and that of second arc is 800 m. If the chainage of point of intersection is 7450 m find the chainage of tangent points and point of compound curvature. Deflection angle for the first arc is 35°.
10 M

6(a) Define satellite station and reduction to centre.
4 M
6(b) Explain the different tape corrections applied for base length calculations.
8 M
6(c) From a satellite station S, 6.8 m from the main triangulation station A the following directions were observed:
A = 0*0', B=132°18'30", C =232&act;24'6", D=290&act;6'11"
The length of AB, AC And AD were 3265.5 m, 4022.2 m and 3086.4 m respectively. Determine the direction of AB, AC and AD.
8 M

7(a) Define : (i) Transition curves (ii) Super elevation (iii) Bernoullis Laminiscate curve
6 M
7(b) With neat sketches, explain the types of vertical curve.
6 M
7(c) A road bend which deflects 76° is to be designed for a maximum speed of 80 km per hour. If the maximum centrifugal ratio is &frac;14 and maximum rate of change of radial acceleration is 0.3 m/sec3. Calculate
(i) Radius of the circular arc.
(ii) Length of transition curve.
(iii) Total length of transition curve.
8 M

8(a) Describe the principle of working of a planimeter
6 M
8(b) The following readings were obtained when an area was measured by a planimeter, the tracing arm being set to the natural scale. The initial and final readings were 3.46 and 5.25. The zero of the disc passed the index mark once in the clockwise direction the anchor point was inside the figure with the value of constant C of the instrument is 26.430. Calculate the area of the figure. Take M = 100 sq.cm.
6 M
8(c) A railway embankment is 10 m wide side slope 1&frac;12:1. Assumeing the ground to be level in a direction transverse to the center line, calculate the volume of earthwork in a length of 140 m. The formation level at zero chainage is 409.50 m and the ground has a rising gradient of 1 in 100.
 Distance m 0 50 100 150 200 250 300 350 R.L.m 407.5 408.5 409.1 410.9 411.5 410.6 409.5 409
8 M

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