Surveying Online Test – Paper 3

1. 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

2. The direction of the steepest slope on a contour is

3. The errors due to bad ranging are

4. Placing the table over the station such that the station plotted on the sheet is exactly above the corresponding station on the ground is:

5. The stadia hairs are not used in

6. The sag correction is always

7. Tacheometry is adopted where

8. Compensating errors in chaining or other surveys are

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

10. Isogonic lines are

11. Setting up the plane table consists of operations:

12. The main difference between theodolite and level is:

13. The Philadelphia rod is a type of

14. A 30 m long chain when tested should not show errors exceeding

15. In the case of a telescopic alidade, the adjustment done is

16. Find the length of curve if the radius of the curve is 50 m, and the angle of deflection is 60°

17. In plane table instrument for horizontal & vertical measurement without chaining

18. If the quadrantal bearing of a line is N 35° W, then the whole circle bearing is

19. The rise and fall method

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

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

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

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

24. The principle of surveying to prevent the accumulation of errors is

25. The reciprocal leveling eliminates

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

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

28. The shape of the vertical curve generally used is

29. A staff reading taken on a benchmark/ known elevation or change point is known as

30. For a line AB

31. A negative declination shows the magnetic meridian to the

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

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

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

35. The angle that can be set by a French cross-staff is

36. *The observed reading on a leveling staff was 3.545 m. If the staff was 0.150m off from the original ground level, what should be the correct reading?

37. The closing error is given by

38. The angular error of closure or summation error should not exceed (Where N is the number of stations or sides.)

39. The direct method of contouring is

40. The multiplying constant of a tacheometer is

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

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

43. The sensitivity of the bubble tube expressed in terms of the angular value of one division of the bubble is given by

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

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

46. The angle subtended by the long chord of a simple curve at its center is equal to

47. In the case of leveling staff readings are taken by (In the case of target staff)

48. If the bearing of AB is N 30° W and the bearing of BC is N 40° E, then find the angle < ABC

49. A series of closely spaced contour lines represent a

50. In the whole circle system, the bearings are measured