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  • Question
  • Pick up the correct specification of Ramsden eyepiece from the following :


  • Options
  • A. it consists of two equal piano convex lenses
  • B. the curved surfaces of plano-convex lenses face each other
  • C. the two lenses are separated by a distance equal to 2/3 of the focal length of either lens.
  • D. the distance between the diaphragm and the front lens of the eyepiece is kept equal to 1/4 th of the focal length of a lens so that rays from a point on the diaphragm enter the eye as a parallel beam
  • E. all the above.

  • Correct Answer
  • all the above. 


  • Surveying problems


    Search Results


    • 1. Cross hairs in surveying telescopes, are fitted

    • Options
    • A. in the objective glass
    • B. at the centre of the telescope
    • C. at the optical centre of the eye piece
    • D. in front of the eye piece.
    • Discuss
    • 2. On a diagonal scale, it is possible to read up to

    • Options
    • A. one dimension
    • B. two dimensions
    • C. three dimensions
    • D. four dimensions.
    • Discuss
    • 3. The diaphragm of a stadia theodolite is fitted with two additional

    • Options
    • A. horizontal hairs
    • B. vertical hairs
    • C. horizontal and two vertical hairs
    • D. none of these.
    • Discuss
    • 4. A back sight

    • Options
    • A. is always taken on a point of known elevation or can be computed
    • B. is added to the known level to obtain the instrument height
    • C. taken on an inverted staff is treated as negative
    • D. all the above.
    • Discuss
    • 5. Pick up the correct statement from the following :

    • Options
    • A. the power of a lens is the reciprocal of its focal length
    • B. the unit of power of the lens is diopter
    • C. the power of two or more thin lenses in contact is the power of the combination of the lenses
    • D. all the above.
    • Discuss
    • 6. The systematic errors which persist and have regular effects in the performance of a survey operation, are due to

    • Options
    • A. carelessness
    • B. faulty instrument
    • C. inattention
    • D. none of these.
    • Discuss
    • 7. A dumpy level is set up with its eye-piece vertically over a peg A. The height from the top of peg A to the centre of the eye-piece is 1.540 m and the reading on peg B is 0.705 m. The level is then setup over B. The height of the eye-piece above peg B is 1.490 m and a reading on A is 2.195 m. The difference in level between A and B is

    • Options
    • A. 2.900 m
    • B. 3.030 m
    • C. 0.770 m
    • D. 0.785 m
    • E. 1.770 m.
    • Discuss
    • 8. The area of a plane triangle ABC, having its base AC and perpendicular height h, is

    • Options
    • A. bh
    • B. ba sin C
    • C. bc sin A
    • D. S(S - a)(S - b)(S - c)
      where S is
    • E. all the above
    • Discuss
    • 9. A relatively fixed point of known elevation above datum, is called

    • Options
    • A. bench mark
    • B. datum point
    • C. reduced level
    • D. reference point.
    • Discuss
    • 10. Geodetic surveying is undertaken

    • Options
    • A. for production of accurate maps of wide areas
    • B. for developing the science of geodesy
    • C. making use of most accurate instruments and methods of observation
    • D. for determination of accurate positions on the earth's surface of system of control points
    • E. all the above.
    • Discuss


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