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  • Question

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


  • Options
  • A. The scale of a tilted photograph of focal length f, taken from an altitude H, along the plate parall
  • B. The scale of a tilted photograph of focal length f, taken from an altitude H, along the plate parall
  • C. The scale of a tilted photograph of focal length f, taken from an altitude H, along the plate parall
  • D. The scale of a tilted photograph of focal length f, taken from an altitude H, along the plate parall

  • Correct Answer
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    • Advanced Surveying problems

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

    • Options
    • A. isocentre
    • B. principal point
    • C. perspective centre
    • D. plumb line.
      • Discuss
    • 2. ? and ? 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

    • Options
    • A.
    • B.
    • C.
    • D. .
      • Discuss
    • 3. By applying clockwise swing to right projector, maximum y-parallax is introduced in the model at

    • Options
    • A. position 1
    • B. position 2
    • C. position 4
    • D. position 6.
      • Discuss
    • 4. Spring tides are caused when

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

    • Options
    • A. ground principal point
    • B. ground plumb point
    • C. iso-centre
    • D. perspective centre.
      • Discuss
    • 6. The net ground area of a vertical photograph 20 cm x 20 cm on scale 1 : 10,000 having overlaps 60% and 30%, is

    • Options
    • A. 0.50 sq km
    • B. 0.56 sq km
    • C. 0.60 sq km
    • D. 0.64 sq km.
      • Discuss
    • 7. The rate of change of parallax dp/dh with respect to change in h, may be expressed as

    • Options
    • A. fB/(H - h)
    • B. fB/(H - h)2
    • C. fB/(H + h)
    • D. fB/(H + h)2.
      • Discuss
    • 8. Pick up the in-correct statement from the folowing :

    • Options
    • A. Correction for refraction is always negative
    • B. Correction for parallax is always positive
    • C. Correction for semi-diameter is always negative
    • D. Correction for dip is always negative
    • E. None of these.
      • Discuss
    • 9. The prime vertical passes through

    • Options
    • A. the east point of the horizon
    • B. the west point of the horizon
    • C. the zenith point of the observer
    • D. the nadir point of horizon
    • E. all the above.
      • Discuss
    • 10. The difference of parallax for a given difference in elevation is independent of

    • Options
    • A. focal length of the camera
    • B. overall size of the photo graphs
    • C. percentage of overlap
    • D. all the above.
      • Discuss

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