Surveying Online Test – Paper 3

1. Secular variation is an important factor because

2. A traverse consists of six sides; then the sum of external angles must be

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

4. The levels to which the earthwork will have to be carried out is known as

5. Subtense bar is an instrument used for the measurement of horizontal distance in

6. Natural error in leveling is caused due to

7. Isogonic lines are

8. For accurate work, in comparison to the chain, the steel band is used because it

9. A building is an obstacle to

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

11. The bearing of the traverse line is calculated by

12. 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

13. The W.C.B of a line is preferred to a quadrantal bearing merely because

14. The angular and linear measurement of the part of the traverse can be checked by

15. The important points selected at the ends of the chain lines to command the boundaries of the survey are known as

16. *Accuracy of 'fix' by two-point problem is

17. During chaining along a straight line, the leader of the survey party has three arrows, and while the follower has five arrows. The distance of the follower from the starting point will be

18. When several contours coincide, it indicates

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

20. Chainage is the distance measured

21. Least count is given by

22. If the plane table is not horizontal in a direction at right angles to the alidade, the line of sight is parallel to the fiducial edge only for:

23. In trigonometrical leveling, the combined correction is given by (where m=coefficient of refraction)

24. Which one is wrong?

25. The closing error is given by

26. When the following scale is the smallest one

27. During leveling staff readings are taken 1.0, 0.8 & 0.6 from consecutive horizontal crosshairs, the staff intercept should be

28. The magnetic north is indicated by

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

30. If Θ is the angle of the slope, L is the length of the slope, and H is the difference in elevation between the two ends of the link, then the slope correction will be

31. Level surface is parallel to

32. A scale representing either three units or only one unit and its fractions up to the second place of the decimal point is

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

34. In an internal focusing type of telescope, the negative lens provided is

35. Permanent adjustment is carried out to

36. A traverse deflection angle is

37. Tacheometry is adopted where

38. Closed contours with higher value inside represent a

39. Metallic tapes are made of

40. In leveling across a hill, the level should be set up on

41. The spacing of cross-sections in the indirect method of contouring depends upon

42. *Error due to imperfect adjustment of plate level is termed as

43. In a closed traverse by included angles, the sum of measured interior angles should be equal to

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

45. Intersection is preferred to radiation when:

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

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. The height of instrument method is

49. The tie line is run through the survey to

50. The upper plate