Surveying Practice Test 3

1. The precision on plains will be less than that on hills.

2. If the observed back sight and fore sight are x1 and x2. The correction back sight on A will be equal to x1-y1, where y1= D1 tan i°. The correct fore sight on B will be equal to x2-y2 where, y2 = D2 tan i°. Then what is the correction difference in level between A and B, if D1 = D2?

3. Find the value of R.L, if B.M = 400 m, B.S = 1.142 m, F.S = 2.121 by using rise and fall method?

4. A closed contour line with one or more higher ones inside to represent _____

5. In the following figure, D = __________

6. In cross sections method, cross sections are run traverse to the centre line of a road, railway or canal etc.

7. The establishment of line of sight, therefore, involves the following two essential conditions, the real image must be formed in front of the eyepiece, the plane of the image must coincide with that of the cross hairs.

8. The line that marks the limits of drainage area has the following characteristics it passes through every ridge or saddle that divides the drainage area from other areas.

9. Which type of levelling is done on the phenomenon, the difference in elevation between two points is proportional to the difference in atmospheric pressure at these points?

10. To contour lines having the same elevations cannot unite and continue as one line.