Surveying Online Test – Paper 3

1. An example of a level surface is

2. If the image formed by the objective of the telescope is not in the plane of crosshairs, it is called

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

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

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

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

7. The most probable value of an observed quantity available from a given set of observations is the one for which the sum of the square of errors is a minimum. This statement is called

8. The graduations in a prismatic compass are

9. An instrumental error in compass survey is because

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

11. Automatic level has advantages of

12. 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

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

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

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

16. If the observed reading of a level staff is 3.83m, and at the point sighted the staff is 0.15m off from the vertical through the bottom, the correct reading will be

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

18. Handles of chains are made of

19. The Q.B of the lines are given by...., ...., & ..... If W.C.B. of the lines are 0°, 135°, 270° respectively

20. 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:

21. Height of instrument method of leveling, as compared to the rise and fall method, is

22. The contour lines merge or cross one another on the map in the case of

23. A relatively fixed point of known elevation above the datum is called

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

25. Pick up the odd statement

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

27. 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

28. Theodolite traverse is plotted more accurately by

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

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

31. The tacheometric method is a more suitable method for preparing the contour map of

32. Level surface is parallel to

33. The multiplying constant of a tacheometer is

34. The number of horizontal cross wires in a stadia diaphragm is

35. A negative declination shows the magnetic meridian to the

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

37. Which one is wrong?

38. A series of closely spaced contour lines represent a

39. The RL of the benchmark is 1000.0 m, and the back sight reading at the benchmark is 2.555 m. Find the staff reading of IS if the RL of IS is 1000.055 m

40. The difference between the sum of the measured angles and the theoretical sum of the angles of a closed traverse is called the

41. Actually, which is not the method of plane tabling?

42. The types of instrument generally used in the survey of gravity water supply system are:

43. The error eliminated by taking the mean of both face observations is

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

45. The designation of scale recommended by IS: 1491-1959 is

46. Dumpy level is used when

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

48. Horizontal equivalent of a uniform slope must be

49. Different grades are joined together by a

50. The magnetic declination at a place is 7°20' W, the bearing given by the compass is S45°40'E, the true bearing of the place is