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  • Question

  • 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.

  • Correct Answer
  • Correction for semi-diameter is always negative 

    • Advanced Surveying problems

    Search Results

    • 1. 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
    • 2. 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
    • 3. 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.
    • B.
    • C.
    • D.
      • Discuss
    • 4. 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
    • 5. ? 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
    • 6. 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
    • 7. 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
    • 8. The point on the photograph where bisector between the vertical line through optical centre of the camera lens and the plate perpendicular meets, is known as

    • Options
    • A. principal point
    • B. isocentre
    • C. plumb point
    • D. perspective centre.
      • Discuss
    • 9. The negative sign is assigned to

    • Options
    • A. reduction to mean sea level
    • B. correction for horizontal alignment
    • C. correction for slope
    • D. correction for slope
    • E. all the above.
      • Discuss
    • 10. The method of surveying by triangula-tion was first introduced by the Dutchman Snell in

    • Options
    • A. 1600
    • B. 1615
    • C. 1630
    • D. 1650
    • E. 1680.
      • Discuss

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