Surveying Online Test – Paper 3

1. Crosshairs in a surveying telescope are fitted

2. A 30m chain was found to be 20cm too long after chaining 1500m. The correct length of the total distance chained will be

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

4. 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

5. An anallatic lens is provided in a tacheometer to measure the horizontal distance.

6. The main difference between theodolite and level is:

7. Revolving of the telescope of a theodolite in a horizontal plane is

8. A contour map of the area is essential before proceeding with the construction of

9. The location of the contour gradient for a highway is best set out from

10. The representation of general topography of a very flat terrain is possible only

11. Short offsets are measured with

12. 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:

13. Axis method of traverse correction is used when

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

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

16. Contour lines look to cross each other in the case of

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

18. The method of plane tabling generally adopted to obtain details and plotting inaccessible points is:

19. "Cross-sectioning" and "Longitudinal sectioning" is

20. If the included angle is greater than 180°, the deflection angle is

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

22. The angle of intersection of the horizon mirror and the index mirror of an optical square is

23. Normal tension is that pull which

24. The telescope is said to be normal when the

25. The quadrantal system confines the user to measure the bearings from

26. The length of the perpendicular offset from a tangent to the junction of a transition curve and circular curve is equal to

27. The strength of fix' is poor when:

28. Obstacle to ranging but not chaining is

29. "Fiducial edge" is the working edge of

30. The scale used to measure and to set out the angles is

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

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

33. The difference between the most probable value of a quantity and its observed value is

34. In a closed traverse, the algebraic sum of deflection angles is

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

36. "A curve of varying radius introduced between two branches of a compound curve is called

37. *Total station is

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

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

40. If the needle of the compass is sluggish the type of error will be

41. *For the construction of highway/railway

42. The shape of the vertical curve generally used is

43. A leveling station is a point where:

44. Tacheometry is adopted where

45. In normal condition, the difference of fore and back bearing should be?

46. The prismatic compass and the surveyor's compass respectively give

47. The imaginary line passing through the intersection of crosshairs and the optical center of the object is known as:

48. For the route survey of a contour map, the method used is

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

50. *Total station measures