Surveying Online Test – Paper 3

1. 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

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

3. The type of survey in which horizontal and vertical distance is measured

4. A bearing noted N45° E represents

5. The projection of a line on a plane perpendicular to the meridian is known as

6. Different grades are joined together by a

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

8. A traverse deflection angle is

9. The survey stations set up during traversing with the compass should be such that

10. Offset angle taken in chain survey may be

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

12. The reciprocal leveling eliminates

13. If the station A and B are equally affected and in the different direction, then the difference between the forebearing and back bearing of a line AB should be

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

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

16. Methods adopted for traversing are

17. *The correction for refraction is given by

18. Prolongation of a chain line across an obstruction in chain surveying is done by

19. When the whole circle bearing of two lines AB and AC are 115° and 41° respectively, then the included angle BAC will be:

20. To orient a plane table without two inaccessible points, the method generally adopted is:

21. Hydrographic survey deals with the mapping of

22. An instrumental error in compass survey is because

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

24. The representation of general topography of a very flat terrain is possible only

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

26. In the scale of a map is 1:25000, what does it mean:

27. An anallatic lens is a.... used to remove an additive constant in a tacheometer.

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

29. *The method of leveling used to carry out the reconnaissance of an area is

30. When a chain line encounters a river:

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

32. The benchmark of a station A is 500 m, and the back sight reading at the point A is 2 m & foresight reading of station B is 3 m. Find the RL of station B

33. 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

34. The errors due to bad ranging are

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

36. If the sights are vertical

37. The telescope is said to be normal when the

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

39. Cubic parabola is a type of

40. For accurate work, in comparison to the chain, the steel band is used because it

41. In a closed traverse,

42. For the construction of a highway railway

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

44. Handles are connected to the link by

45. Dumpy level is used when

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

47. Contour lines

48. A leveling station is a point where:

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

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