Surveying Online Test – Paper 3

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

2. A series of straight, parallel, and widely spaced contours on a map represent a

3. The effect of local attraction is observed in

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

5. Contour lines

6. Limiting the length of offset depends upon

7. The spacing of crosshairs in a stadia diaphragm of a tacheometer is 1.5mm, and the focal length of the objective glass is 30cm, the multiplying constant of the tacheometer is

8. Well-conditioned triangle having an angle between

9. If the intercept on the vertical staff is observed as 1.5mm from a tacheometer, the horizontal distance between the tacheometer and staff station is

10. An imaginary line connecting the points of equal elevation on the ground surface is known as

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

12. The quadrantal bearing of a line is determined by:

13. The central angle subtended by an arc of 30m of the curve

14. In a survey, it was recorded that Σrise = 0, then

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

16. The Philadelphia rod is a type of

17. Personal error in leveling occurs due to

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

19. Which one is wrong?

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

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

22. *The instrument used to measure horizontal and vertical angle is

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

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

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

26. The minimum horizontal distance between any two consecutive contours is known as

27. The strength of fix' is poor when:

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

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

30. Chainage is the distance measured

31. The longest chain line passing through the center of the area is known as

32. Handles of chains are made of

33. The contour lines are perpendicular to the

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

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

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

37. The difference between a level line and a horizontal line is that

38. The types of survey in which fieldwork and plotting proceed simultaneously are:

39. *The line of collimation should be parallel to

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

41. A building is an obstacle to

42. Bowditch's rule is applied to

43. Contours are used to determine

44. Distomats is a type of

45. The magnetic north is indicated by

46. The needle is adjusted for

47. The purpose of triangulation in a chain survey is

48. If the magnetic bearing of the sun at noon at a place in the southern hemisphere is 150°, the magnetic declination at that place is

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

50. Parallax may be eliminated by