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  • Question
  • When the bubble of the level tube of a level, remains central


  • Options
  • A. line of sight is horizontal
  • B. axis of the telescope is horizontal
  • C. line of collimation is horizontal
  • D. geometrical axis of the telescope is horizontal.

  • Correct Answer
  • line of sight is horizontal 


  • Surveying problems


    Search Results


    • 1. Let angular value of one graduation of a tube of length x be ? seconds and R be the radius of its internal curved surface, then

    • Options
    • A.
    • B.
    • C.
    • D. .
    • Discuss
    • 2. Centering error of a theodolite produces an error

    • Options
    • A. in all angles equally
    • B. which does not vary with the direction or pointing
    • C. which varies with the direction of pointing and inversely with the length of sight
    • D. none of these.
    • Discuss
    • 3. The sum of the interior angles of a geometrical figure laid on the surface of the earth differs from that of the corresponding plane figure only to the extent of one second for every

    • Options
    • A. 100 sq. km of area
    • B. 150 sq. km of area
    • C. 200 sq. km of area
    • D. none of these.
    • Discuss
    • 4. Pantagraph is used for

    • Options
    • A. measuring distances
    • B. measuring areas
    • C. enlarging or reducing plans
    • D. setting out right angles
    • Discuss
    • 5. In levelling operation

    • Options
    • A. when the instrument is being shifted, the staff must not be moved
    • B. when the staff is being carried forward, the instrument must remain stationary
    • C. both (a) and (b)
    • D. neither (a) nor (b).
    • Discuss
    • 6. The angle between two plane mirrors of optical square, is

    • Options
    • A. 20°
    • B. 30°
    • C. 45°
    • D. 60°
    • E. 90°.
    • Discuss
    • 7. In optical reading instruments

    • Options
    • A. the vertical circle is usually continuous from 0° to 359°
    • B. the readings increase when the telescope is elevated in the face left position
    • C. the readings decrease when the telescope is elevated in the face right position
    • D. all the above.
    • Discuss
    • 8. The operation of making the algebraic sum of latitudes and departures of a closed traverse, each equal to zero, is known

    • Options
    • A. balancing the sights
    • B. balancing the departures
    • C. balancing the latitudes
    • D. balancing the traverse.
    • Discuss
    • 9. 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
    • 10. 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


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