Surveying Online Test – Paper 3

1. Find the contour interval for the map, 1: 25000 in IS & FPS

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

3. A river is an obstacle to

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

5. For Y level, Cooke's, and Cushing levels, the line of collimation should coincide with

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

7. A benchmark (BM) is a

8. A level line is a

9. The amount of correction due to local attraction at a place

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

11. Different grades are joined together by a

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

13. The direct method of contouring is

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

15. The observed reading on a leveling staff was 3.525 m. If the staff was 0.125m off from the original ground level, what should be the correct reading?

16. Theodolite is an instrument used for measuring

17. Permanent adjustment is carried out to

18. Leveling across a river is done by

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

20. Negative errors are caused in the chain when its length is

21. Short offsets are measured with

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

23. If the magnetic bearing of a line is 65° and the true bearing 45°, then the magnetic declination is

24. An invert is taken when the point is

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

26. The reduced level of the line of collimation is 50m, and the staff reading at the base of the pillar is 1.15 m. Find the reduced level of the base of the pillar

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

28. The magnification of a telescope lens depends upon

29. If the needle is truly magnetic and is not sluggish

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

31. If the formation level is less than the ground level, the difference between them at any point will give the

32. *For the construction of highway/railway

33. Bench marks are fixed by

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

35. For a line AB

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

37. If the magnetic declination is (-)6°0' and the reduced bearing of a line is S40°01'E, the true bearing of the line is

38. Tellurometer uses

39. Area of triangle joining three corner points in comparison to the circle same three points:

40. In a tacheometer provided with an anallatic lens, the distance between the object glass and the vertical axis is 15 cm. The focal length of the objective is 15 cm, and that of the anallatic lens is 10 cm. Hence, the distance between the two lenses is

41. 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

42. The height of instrument method is

43. In a survey, it was recorded that Σrise = 0, then

44. Natural error in leveling is caused due to

45. The bearing of line AB is 200° and that of BC is 270°, the included angle ABC is

46. The order of accuracy of the elevation of points obtained from a contour map is equal to

47. The process of bringing the vertical circle to the right of the observer is called

48. In chain survey execution, this first step taken is

49. A level tube is used to make the line of sight horizontal. It is filled with

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