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  • Question
  • Cross-staff is used for


  • Options
  • A. setting out right angles
  • B. measuring contour gradient
  • C. taking levels
  • D. measuring distances
  • E. none of these

  • Correct Answer
  • setting out right angles 


  • Surveying problems


    Search Results


    • 1. The whole circle bearing of a line is 290°. Its reduced bearing is

    • Options
    • A. N 20° E
    • B. N 20° W
    • C. N 70° W
    • D. S 70° E
    • Discuss
    • 2. The main plate of a transit is divided into 1080 equal divisions. 60 divisions of the vernier coincide exactly with 59 divisions of the main plate. The transit can read angles accurate upto

    • Options
    • A. 5"
    • B. 10"
    • C. 15"
    • D. 20"
    • E. 30"
    • Discuss
    • 3. The slope correction may be ignored if

    • Options
    • A. the slope of the ground is less than 3°
    • B. to slope of the ground is say 1 in 19
    • C. both (a) and (b)
    • D. neither (a) nor (b)
    • Discuss
    • 4. Removal of parallax, may be achieved by focussing

    • Options
    • A. the objective
    • B. the eye-piece
    • C. the objective and the eye-piece
    • D. none of these.
    • Discuss
    • 5. Ramsden eye-piece consists of

    • Options
    • A. two convex lenses short distance apart
    • B. two concave lenses short distance apart
    • C. one convex lens and one concave lens short distance apart
    • D. two plano-convex lenses short distance apart, with the convex surfaces facing each other.
    • Discuss
    • 6. The least count of a vernier scale is

    • Options
    • A. sum of the smallest divisions of main and vernier scales
    • B. value of one division of the primary scale divided by total number of divisions of vernier scale
    • C. value of one division of vernier scale divided by total number of divisions of primary scale
    • D. none of these.
    • Discuss
    • 7. The Random errors tend to accumulate proportionally to

    • Options
    • A. numbers of operations involved
    • B. reciprocal of operations involved
    • C. square root of the number of operation involved
    • D. cube root of the number of operation involved.
    • Discuss
    • 8. A traverse deflection angle is

    • Options
    • A. less than 90°
    • B. more than 90° but less than 180°
    • C. the difference between the included angle and 180°
    • D. the difference between 360° and the included angle.
    • Discuss
    • 9. In case of reduction of levels by the height of instrument method,

    • Options
    • A. ? B.S. - ? F.S. = difference in R.L.S of the first station and last station
    • B. ? (R.L. + I + F.S.) - first R.L = ? (H.I. + No. of R.L.s.)
    • C. both (a) and (b) above
    • D. neither (a) nor (b).
    • Discuss
    • 10. The tangent to the liquid surface in a level tube, is parallel to the axis of the level tube at

    • Options
    • A. every point of the bubble
    • B. either end of the bubble
    • C. the mid-point of the bubble
    • D. no where.
    • Discuss


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