Surveying Online Test – Paper 3

1. Ten readings were recorded in a level field book. If the instrument was shifted after the 2nd and 6th readings, then the foresight readings are

2. A 30 m long chain when tested should not show errors exceeding

3. The purpose of triangulation in a chain survey is

4. An imaginary line connecting the points of equal elevation on the ground surface is known as

5. The size of the plane table is:

6. The method of tacheometry in which the observation is made with stadia wires with a variable interval is known as

7. Short offsets are measured with

8. A series of straight, parallel, and widely spaced contours on a map represent a

9. In compass surveying

10. Obstacle to ranging but not chaining is

11. The projection of a line on a plane parallel to the meridian is known as

12. The image of the objectives formed should lie

13. The surface of zero elevation around the earth, which is slightly irregular and curved, is known as

14. True meridians

15. The direct method of contouring is

16. *Which instrument is not used in plane table

17. A chain 33 feet long and consisting of 16 links each 2(1/16) feet long is

18. A series of closely spaced contour lines represent a

19. The outer spindle attached to the lower plate in a transit theodolite is known as

20. The surface perpendicular to the direction of gravity is

21. A straight line tangential to the longitudinal curve of the level tube at its center is known as

22. Choose the correct statement:

23. The rise and fall method

24. The direction of the steepest slope on a contour is

25. The limiting length of an offset does not depend upon

26. The effect of local attraction is observed in

27. The errors due to bad ranging are

28. A poor fix of the table is:

29. Azimuth (direct angles) is an angle measured in

30. An imaginary line lying through the surface of the ground, having a constant inclination to the horizontal, is known as

31. In a closed traverse,

32. If the staff is held vertical and the angle of elevation and depression are kept the same, then the horizontal distance between the instrument and staff station computed by observation will be

33. The elevation (BM) of point A is 100 m. Backsight reading at A is 20, and foresight reading at B is 30 m. Find the RL of point B

34. A Cadastral Map is a map having

35. The contour interval depends upon

36. The distance between terminal points computed from a subsidiary traverse run between them is known as

37. *The radius of curvature of the arc of the bubble tube is generally kept

38. Axis method of traverse correction is used when

39. Resection is the method employed for:

40. The levelling head of a transit theodolite consists of

41. The method most suitable for plotting in hilly areas is:

42. The bearing of the traverse line is calculated by

43. For a dumpy level in perfect adjustment, the horizontal cross hair should be in a plane

44. Instrumental error in leveling is an error due to

45. The type of survey in which horizontal and vertical distance is measured

46. The resection by a two-point problem as compared to the three-point problem:

47. If the intercept on the vertical staff is observed as 1.5mm from a tacheometer, the horizontal distance between the tacheometer and staff station is

48. In plane table instrument for horizontal & vertical measurement without chaining

49. In a double-line river, contours are

50. Level surface is parallel to