Surveying Online Test – Paper 3

1. If n observations are taken, the accidental errors are proportional to

2. Direction of the closing error is given by

3. The trunion axis or transverse axis is

4. 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?

5. If the sights are vertical

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

7. A negative declination shows the magnetic meridian to the

8. In a closed traverse,

9. The device used in computing the horizontal and vertical distances rapidly and conveniently is

10. The two-point problem and three-point problems are methods of:

11. The theory of probability is applied to

12. The orientation of the table is done by

13. The direct method of contouring is

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

15. Obstacle to ranging but not chaining is

16. A traverse deflection angle is

17. Find the length of curve if R=500 m, Intersection angle= 120°

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

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

20. Chainage is the distance measured

21. The shape of the vertical curve generally used is

22. True meridians

23. An offset more than 15m in length is known as

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

25. *The line of collimation should be parallel to

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

27. Bowditch's rule is applied to

28. The maximum allowable limit up to which a measurement may vary from the true value is known as

29. The size of the plane table is:

30. The upgrade road meets with the downgrade road, then the curve formed at the junction is called

31. Direct distance measurement method is more suitable to measure in

32. Permanent adjustment is carried out to

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

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

35. The important points selected at the ends of the chain lines to command the boundaries of the survey are known as

36. *Accuracy of 'fix' by two-point problem is

37. 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

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

39. In a dumpy level, the objective and eyepiece lenses are made of two or more small lenses to obtain

40. In a traverse, the algebraic sum of the deflection angles, taking the right-hand deflection angles as positive and left-hand deflection as negative, should be equal to

41. The magnetic bearing of a line is 60°, and the true bearing of the same line is 70°. Find the declination

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

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

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

45. A field is measured with a 1.0 percent too-long chain is found to be 10,000 acres. The corrected area of the field will be

46. Compensator is used to make the line of sight perpendicular to the vertical axis in the case of

47. If the distance between two points A and B is 1km, the combined correction for curvature and refraction will be

48. Error in tacheometric surveying is due to

49. The maximum angular error in laying the direction is 3°; if this maximum displacement of the point on paper is the same for both sources of error, the accuracy in the offset measurement will be

50. The tie line is run through the survey to