Veer Narmad South Gujarat University 2010 B.E Surveying - 2 ( Sem3 )( Civil ) - Question Paper
B. E. - II
RN-6141
Time : 3 Hours]
[Total Marks : 100
Instructions :
(1)
"N Seat No.
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Fillup strictly the details of signs on your answer book.
Name of the Examination :
B. E. - 2 (Sem. 3) (Civil)
Name of the Subject:
Surveying
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-Subject Code No. |
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-Section No. (1,2,.....) |
Student's Signature
1&2
(2) Attempt two sections in separate answer books.
(3) Figures to the right indicate full marks.
(4) Assume suitable data wherever necessary.
(5) Draw neat sketch to support your answer.
1 (a) Write the correct answers : 10
(i) A theodolite in which the telescope can be revolved through a complete revolution in a vertical plane is known as a _.
(a) Non-transit theodolite
(b) Tilting theodolite
(c) Transit theodolite
(ii) Theodolite is an instrument used for _
(a) Measurement of bearings only
(b) Measurement of horizontal angles only
(c) Measurement of vertical angles only
(d) All the above
The operation of revolving the telescope in a vertical plane about its vertical axis is called
(iii)
(a) Swinging
(b) Transiting
(c) Face right
(d) F ace left
(iv) For improved accuracy the included angle is measured by the _.
(a) Reiteration method
(b) Repetition method
(c) Deflection angle method.
(v) the height of instrument (H.I) in levelling is the
(a) height of telescope axis above the ground
(b) elevation of line of sight with respect to a datum.
(c) elevation of line of sight with respect to M.S.L.
(d) None of above
(vi) The surface perpendicular to the direction of the gravity is a _
(a) horizontal surface
(b) level surface
(c) horizon
(d) none of above
(vii) The B.M. fixed at the end of a day's work is called the _.
(a) Permanent B.M
(b) Arbitrary B.M.
(c) Temporary B.M.
(viii) The plane table map cannot be plotted to a different scale, as there is no _.
(a) long book
(b) level book
(c) field book
(d) note book
(ix) The principle of plane table is _.
(a) Parallelism
(b) Triangulation
(c) Traversing
(x) Inaccessible points may be located by the_
(a) Resection method
(b) Intersection method
(c) Radiation method.
(i) Discuss the temporary adjustment of a dumpy level.
(ii) What is contour? Discuss the characteristics of it with suitable sketches.
(iii) In an operation involving reciprocal levelling, two points A and B are taken on opposite banks of a river. When the level was set up near A, the staff readings on A and B were 2.245 and 3.375 respectively. When the level was set up near B, the respective staff readings were 1.955 and 3.055.
Find the true difference of level between A and B. What is the R.L. of B, if that of A is 125.550?
(a) Describe the process of measuring the horizontal 6
angle.
OR
(a) Enlist the sources of errors in a theodolite survey.
(b) The following records are obtained in a traverse 7 survey, where the length and bearing of the lost
line were not recorded :
|
Line |
Length (m) |
Bearing |
|
AB |
75.50 |
30 24 |
|
BC |
180.50 |
110 36 |
|
CD |
60.25 |
210 30 |
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DA |
(?) |
(?) |
Compute the length and bearing of line DA.
(a) Write the functions of a theodolite. 3
(b) Attempt any two : 14
(i) Describe the procedure of setting up the plane table over a station.
(ii) What are the methods of plane tabling? Describe any one of them with a sketch.
(iii) Differentiate between radiation and intersection method.
(a) Explain cross head, boning rod, post and sewer invent. Give the steps how the setting out work will be carried out for fixing the invert of a sewer in downslope.
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14-rn
5
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P
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For an excavation pit marked by the above figure the depths of excavations for the various points are as below : | ||||||||||||||||
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Calculate the volume of earthwork. |
5 (a) Illustrate drawing sketches how the tangent lengths will 8 be marked if the point of intersection of the tangents is inaccessible so as to set the simple circular curve.
(a) Explain the tacheometric method for setting out simple circular curve.
(b) In constructing a reservoir an excavation pit with 7 dimensions at bottom as 16 m x 12 m and height equal
to 5 metres is to be made. If the sides of the excavation have slope of 2 horizontal to 1 vertical calculate the volume of earthwork. Assume that the ground surface is level before excavation.
6 (a) Explain prismoidal correction. Obtain an expression 7 for simple case of level section is terms of the side slope s: 1, formation width b, h and H heights of centre and the sections are distance 'd' apart.
(b) Draw sketches and explain how setting out of 6 building will be done by making use of rectangle formed by centre lines of the outer wall of a building.
(c) Calculate the first three perpendicular offsets from 7 long chord at an interval of 20 metres to set out a simple circular curve of 280 metre radius and deflection angle 60
RN-6141] 4 [ 100 ]
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Attachment: |
| Earning: Approval pending. |
