### Civil Engineering - Advanced Surveying MCQs Part 2

1. In field astronomy, the quantities observed are entirely

A.
lengths
B.
angles
C.
heights
D.
all of these.

2. The orthogonal projection of the perspective centre on a tilted photograph, is called

A.
B.
isocentre
C.
principal point
D.
plumb point.

3. The principal plane contains

A.
B.
iso centre
C.
principal point
D.
principal axis and principal line
E.
all the above..

4. The point where vertical line passing through the perspective centre intersects the plane of the photograph, is known as

A.
photo plumb point
B.
plumb point
C.
D.
isocentre
E.
none of these.

5. Pick up the correct statement from the following :

A.
Aerial photographs may be either vertical or oblique
B.
Vertical photographs are taken with the axis of camera pointing vertically downward
C.
Vertical photographs are used for most accurate maps
D.
On oblique photographs, scale variation is larger as compared to that of vertical photographs
E.
all the above.

6. An aerial photograph may be assumed as

A. parallel projection
B. orthogonal projection
C. central projection
D. none of these.

7. If the equatorial distance between two meridians is 100 km, their distance at 60° latitude will be

A. 1000 km
B. 800 km
C. 600 km
D. 500 km
E. 400 km.

8. The rate of change of parallax dp/dh with respect to change in h, may be expressed as

A. fB/(H - h)
B. fB/(H - h)2
C. fB/(H + h)
D. fB/(H + h)2.

9. The displacement of the pictured position of a point of h elevation on a vertical photograph taken with a camera of 30 cm focal length, from an altitude of 3000 m, is

A. 4.4 mm
B. 5.5 mm
C. 6.5 mm
D. 7.5 mm
E. 10 mm

10. The net ground area of a vertical photograph 20 cm x 20 cm on scale 1 : 10,000 having overlaps 60% and 30%, is

A. 0.50 sq km
B. 0.56 sq km
C. 0.60 sq km
D. 0.64 sq km.

11. If 16 flight lines are run perpendicular to an area 30 km wide, their spacings on a photographical map on scale 1 : 50,000 , will be

A. 1 cm
B. 2 cm
C. 3 cm
D. 4 cm
E. 5 cm.

12. The scale of a tilted photograph of focal length f taken from an altitude H, along the plate parallel through principal point is

A.
B.
C.
D.

13. The position of the sun when its north declination is maximum is known as

A. vernal equinox
B. Autumnal equinox
C. summer solstice
D. winter solstice.

14. Pick up the correct statement from the following :

A. the vertical plane containing the zenith, the station of observation and the celestial pole is the observer's meridian plane.
B. the angle between the direction of star in vertical plane and the direction of the star in horizontal plane is called the altitude of the star.
C. the complement of the altitude of star is called the zenith distance of the star.
D. all the above.

15. For mapping any country

A. geodetic triangulation of greatest possible sides and accuracy is carried out
B. primary triangles are broken down into secondary triangles of somewhat lesser accuracy
C. secondary triangles are further broken into third and fourth order triangles, the points of which are used for detail surveys
D. all the above.

16. The foot of the perpendicular on the picture plane through the optical centre of the camera lens, is known as

A. isocentre
B. principal point
C. perspective centre
D. plumb line.

17. The point where a vertical line through the optical centre of the camera lens intersects the ground, is known as

A. ground principal point
B. ground plumb point
C. iso-centre
D. perspective centre.

18. At eastern elongation, the pole star moves

A. eastward
B. westward
C. northward
D. southward.

19. Circumpolar stars

A. rotate round the north pole
B. rotate round the celestial pole
C. remain always above the horizon
D. are seldom seen near the pole star
E. none of these.

20. By applying clockwise swing to right projector, maximum y-parallax is introduced in the model at

A. position 1
B. position 2
C. position 4
D. position 6.

21. The scale of the photography taken from a height of 300 m, with a camera of focal length 15 cm, is

A. 1 : 10,000
B. 1 : 15,000
C. 1 : 20,000
D. 1 : 30,000.

22. A nautical mile is

A. one minute arc of the great circle passing through two points
B. one minute arc of the longitude
C. 6080 ft
D. 1855.109 m
E. all the above.

23. The following points form a pair of homologous points :

A. Photo principal point and ground principal point
B. Photo isocentre and ground isocentre
C. Photo plumb point and ground plumb point
D. all the above.

24. The latitude of the observer's position, is

A. elevation of the elevated pole
B. declination of the observer's zenith
C. angular distance along the observer's meridian between equator and the observer
D. north or south according as the observer is north of equator or south of equator
E. all the above.

25. The maximum error in radial line assumption, is

A.
B.
C.
D.

26. The moon rotates round the earth once in every

A. 29 days
B. 29.35 days
C. 29.53 days
D. 30 days.

27. The First Point of Aeries

A. is the point in the celestial sphere where zero meridian crosses the celestial equator
B. is usually denoted by the Greek letter γ
C. is located near the very conspicuous rectangle of stars in the constellations of Pegasus and Andromeda.
D. all the above.

28. The parallax of a point on the photograph is due to

A. ground elevation
B. flying height
C. length of air base
D. focal length of the camera.
E. all the above.

29. A star may culminate at zenith if its declination is

A. greater than the longitude of the place
B. less than the latitude of the place
C. equal to the latitude of the place
D. none of these.

30. For adjusting a quadrilateral whose both the diagonals are observed, the equations of conditions involved, are

A. two angle equations and two side equations
B. one angle equation and three side equations
C. three angle equations and one side equation
D. none of these.

31. The nearest star is so far away from the earth that the directions to it from two diametrically opposite points on the earth differs less than

A. 0.01 second
B. 0.001 second
C. 0.0001 second
D. none of these.

32. The station where observations are not made, but the angles at the station are used in triangulation series, is known as

A. satellite station
B. subsidiary station
C. pivot station
D. main station.

33. Spring tides are caused when

A. sun and moon are in line with earth
B. solar tidal force acts opposite to lunar tidal force
C. solar tidal force and lunar tidal force both coincide
D. none of these.

34. α and β are the angles subtended by a point of elevation h at their air station with respective plumb points. Photo scale and focal length of the lens being S and f respectively. Parallax displacement of the point due to relief, is

A.
B.
C.
D. .

35. Longitude of a place is the angular distance between the meridian of the place and

A. the standard meridian
B. the international date line
C. that of Greenwich
D. both (a) and (c) of above.

36. The average eye base is assumed as

A. 58 mm
B. 60 mm
C. 62 mm
D. 64 mm
E. 72 mm.

37. Pick up the correct statement from the following :

A. One degree of longitude has greatest value at the equator
B. One degree of longitude has greatest value at the poles
C. One degree of longitude has the same value everywhere
D. One degree of latitude decreases from the equator to the poles
E. One degree of latitude has greatest value at the poles.

38. Pick up the incorrect statement from the following :

A. Latitudes north of the equator are taken as positive
B. Latitudes south of the equator are taken as negative
C. Longitudes east of Greenwich are taken as negative
D. Longitudes west of Greenwich are taken as positive.
E. Both (c) and (d) of the above.

39. To obtain photographs of an area of 1000 m average elevation, on scale 1 : 30, 000, with a camera of 30 cm focal length, the flying height is

A. 4000 m
B. 5000 m
C. 6000 m
D. 7000 m.

40. If the image of a triangulation station of R.L. 500 m is 4 cm from the principal point of a vertical photo taken from an altitude of 2000 m, above datum, the height displacement will be

A. 2 mm
B. 4 mm
C. 6 mm
D. 8 mm
E. 10 mm.

41. Rotation of the camera at exposure about its vertical axis, is known as

A. swing
B. tilt
C. tip
D. none of these.

42. The difference of height of two points whose parallax difference is 0.8 mm on a pair of stereo pair taken from a height H is 100 m. If mean photo base is 95.2 mm, the flying height is

A. 8,000 m
B. 10,000 m
C. 12,000 m
D. 14,000 m

43. The scale of a tilted photograph of focal length f, taken from an altitude H, along the plate parallel through plumb point, is

A.
B.
C.
D.

44. The flying height of the camera is 1, 000 m above mean ground level, the distance of the top of a Minar from a nadir point is 10 cm and the relief displacement of Minar is 7.2 mm. The height of the Minar, is

A. 52 m
B. 62 m
C. 72 m
D. 82 m.

45. On vertical photographs, height displacement is

A. positive for points above datum
B. negative for points below datum
C. zero for points vertically below the air station
D. all the above.

46. Assuming human normal vision distance 25 cm, smallest measurable angle 20", and introcular distance 6.5 cm, the smallest depth to be discerned is

A. 0.1 mm
B. 0.5 mm
C. 1.00 mm
D. 1.1 mm.

47. The main object of the astronomer to obtain

A. astronomical latitude
B. astronomical longitude
C. astronomical bearing
D. all of these.

48. If f is the focal length of the camera lens and θ is the angle of tilt, the distance of the plumb point from the principal point will be

A. f sin θ
B. f cos θ
C. f tan θ
D. f sec θ.

49. Pick up the incorrect statement from the following. High oblique photographs

A. may have tilt up to 30°
B. may include the image of the horizon
C. may not include the image of the horizon
D. none of these.