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Civil Engineering :: Advanced Surveying

  1. In field astronomy, the quantities observed are entirely

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

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

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

  5. The principal plane contains

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

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

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

  9. Pick up the correct statement from the following :

  10. 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.

  11. An aerial photograph may be assumed as

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

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

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

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

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

  17. 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

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

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

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