Surveying Online Test – Paper 3

1. Theodolite is an instrument used for measuring

2. 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

3. Prolongation of a chain line across an obstruction in chain surveying is done by

4. The line normal to the plumb line is known as

5. For any point on the surface with a given inclination, the contour gradient possible is

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

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

8. The position of a point can be fixed more accurately by

9. The instrument used for measuring area on a contour map is

10. If W is the weight of the chain, L is the span, and P is the tension or pull, the sag correction for the chain will be

11. The fundamental lines of transit of the theodolite are

12. *The correction for refraction is given by

13. The three-point problem can be solved by:

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

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

16. Plane table surveying is a graphical method of surveying in which:

17. *For the construction of highway/railway

18. The errors due to bad ranging are

19. The main difference between an optical square and a prism square is

20. A 30 m long tape was standardized at a temperature of 30°C; at the time of measurement, the temperature recorded was 35°C. Then the correction for temperature per tape length is (coefficient of thermal expansion = 0.0001116/°C)

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

22. The absence of chromatic aberration in a telescope is known as

23. *Total station measures

24. The difference between the two bearings of the last line as observed at the first and the last station of a traverse is known as

25. A chain is made up of mild steel or galvanized iron wire of diameter

26. A benchmark (BM) is a

27. An anallatic lens is a.... used to remove an additive constant in a tacheometer.

28. Tacheometry is best suited

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

30. Different grades are joined together by a

31. The effect of local attraction is observed in

32. Level surface is parallel to

33. Cubic parabola is a type of

34. The intercept of a staff is

35. Isogonic lines are

36. A discrepancy is the difference between

37. The absence of spherical aberration in a telescope is known as

38. Contour interval, within the limits of a map

39. Short offsets are measured with

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

41. The "point of the curve" of a simple circular curve is

42. A Cadastral Map is a map having

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

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

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

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

47. In a closed traverse,

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

49. 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

50. A disadvantage of plane table survey is: