chain, compass and plane table surveying

1. Rambabu Palaka, Assistant Professor, BVRIT, Narsapur, Telangana State, India
SURVEYING
(Chian, Compass & Plane Table Surveying)
Question Bank
1. The object of surveying is to prepare a map.
2. The main principle of surveying is to work from the whole to the part.
3. A 20 m chain is divided into 100 links.
4. The length of a link in a chain is 20 cm.
5. For ranging a line, the number of ranging rods required is At least three.
6. The preliminary Inspection of the area to be surveyed is known as Reconnaissance survey.
7. In a prismatic compass zero is marked on the South end.
8. The closing error in a closed traverse is adjusted by Bowditch's rule.
9. The principle of plane table is Parallelism.
10. The line passes through zero declination is known as the Agonic line.
11. At the equator the dip of the magnetic needle is 0°.
12. In the whole circle Bearing (WCB), a line is said to be free from local attraction if the
difference between the FB and BB is 180°.
13. Alidade is used in Plane Tabling.
14. Aim/Advantage of working from whole to part is Errors are reduced.
15. A metallic tape is made of cloth and wires.
16. For a well-conditioned triangle, no angle should be less than 30°.
17. The angle of intersection of the two plane mirrors of an optical square is 45°.
18. Which of the following angles can be set out with the help of French cross staff?
either 45° or 90°.
19. The permissible error in chaining for measurement with chain on rough or hilly ground is
1 in 250.
20. Cross staff is an instrument used for setting out right angles.

2. Rambabu Palaka, Assistant Professor, BVRIT, Narsapur, Telangana State, India
21. Normal tension is that pull which neutralizes the effect due to pull and sag.
22. If the length of a chain is found to be short on testing, it can be adjusted by straightening the
links.
23. The maximum tolerance in a 20 m chain is ±5 mm.
24. Local attraction in compass surveying may exist due to presence of magnetic substances near
the instrument.
25. In the quadrantal bearing system, a whole circle bearing of 293° 30' can be expressed as
N 66° 30' W.
26. The horizontal angle between the true meridian and magnetic meridian at a place is called
declination.
27. A negative declination shows that the magnetic meridian is to the western side of the true
meridian.
28. The type of surveying which requires least office work is plane table surveying.
29. The size of a plane table is 750 mm x 600 mm
30. The process of determining the locations of the instrument station by drawing resectors from
the locations of the known stations is called Resection.
31. The instrument used for accurate centering in plane table survey is plumbing fork or U-
Frame
32. Bowditch rule is applied to a closed traverse for adjustment of closing error.
33. Chain Surveying is suitable when the area to be surveyed is comparatively small
34. The process of fixing or establishing intermediate stations is called a Ranging
35. The reference line that passes through the North and South geographic poles of the earth is
called as True Meridian
36. If the Reduced bearing of a line is S 10° W, its Whole Circle Bearing is 190°
37. The type of surveying that takes into account the true shape of the earth is Geodetic
Surveying
38. The direction of a line as given by the acute angle between the line and a Meridian
Bearing

3. Rambabu Palaka, Assistant Professor, BVRIT, Narsapur, Telangana State, India
39. The type of surveying that the curvature of earth ignored is Plane Surveying
40. Quadrantal bearing is sometimes called as Reduced Bearing
41. The method of surveying where field observations and plotting proceed simultaneously is
Plane Table Surveying
42. Three basic operations needed at each plane table station are Centering, Levelling, and
Orientation
43. The instrument used for setting up North Orientation in Plane Table survey is
Trough Compass
44. A mosque is situated on the far side of a river and is inaccessible; it can be located by which
method of plane table surveying? Intersection Method
45. If the magnetic bearing of a line is 30° 30' and the magnetic declination is 2° 30' W, the true
bearing of the line will be 28°