Surveying Online Test – Paper 3

1. The Bench Mark of a point is 400m. Backsight reading at the benchmark is 2.20, and the foresight reading of point A is 2.10. Find the RL of point A

2. Closed contours with higher value inside represent a

3. 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

4. Any arbitrarily assumed level line from which vertical distances are measured is known as

5. The magnetic north is indicated by

6. *The line of collimation should be parallel to

7. In the direct method of contouring, the process of locating points lying on a contour is known as

8. In survey works, declination varies from time to time and place to place. The main important variation is

9. The accuracy of measurement in chain surveying does not depend upon

10. Isogonic lines are

11. In a closed traverse,

12. Azimuth and altitude of a star

13. Chain surveying is used for a small area in

14. 'SPIRE TEST' is used in the permanent adjustment of theodolite for

15. *The two-peg method is used to check the parallelism between the

16. When the whole circle bearing of two lines AB and AC are 115° and 41° respectively, then the included angle BAC will be:

17. A benchmark (BM) is a

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

19. A disadvantage of plane table survey is:

20. The survey stations set up during traversing with the compass should be such that

21. The range of accuracy in measuring distance by EDM with respect to ODM is

22. Size of a theodolite is specified by

23. The curvature and refraction corrections applied to staff readings respectively are

24. Indirect ranging method is adopted when two points of the chain line are:

25. In the stadia method, if k is the multiplying factor, s is the staff intercept, c is the additive constant of the instrument, then the distance equation is given by the expression

26. *For the construction of highway/railway

27. Angular surveying in which both the horizontal and vertical positions of a point are obtained by optical means is known as

28. The foremost work to be executed while traversing with a compass is

29. The levelling head of a transit theodolite consists of

30. When the angular and linear measurements are equally precise in traversing, the balancing of the traverse is done by:

31. Crosshairs in a surveying telescope are fitted

32. In a theodolite, staff readings for upper, middle, and lower crosshairs are 1.4, 0.9 & 0.4, respectively. If the height of the tower is 100m, then find the horizontal distance between the instrument station and the base of the tower

33. Find the length of curve if radius of curve

34. Find the length of curve if R=500 m, Intersection angle= 120°

35. The instrument used to reproduce plans to a different scale is called

36. The horizontal distances obtained by tacheometry are corrected for

37. The contour line can cross one another on a map only in the case of

38. An operation for determining the relative elevations of different points on the surface of the earth is known as

39. The vertical distance between any two consecutive contours is known as

40. Direction of the closing error is given by

41. The advantage of anallatic lens is

42. The maximum angular error in laying the direction is 3°; if this maximum displacement of the point on paper is the same for both sources of error, the accuracy in the offset measurement will be

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

44. In compass surveying

45. *The leveling of the instrument is done such that

46. The smaller angle which a survey line makes with the true meridian is known as

47. Setting up the plane table consists of operations:

48. If n observations are taken, the accidental errors are proportional to

49. The method of tacheometry in which the stadia hair intercept is fixed is known as

50. Working edge of alidade is called