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  • Question
  • A dumpy level was set up at the midpoint between two pegs A and B, 50 m apart and the staff readings at A and B were 1.22 and 1.06. With the level set up a A, the readings at A and B were 1.55 and 1.37. The collimation error per 100 m length of sight is


  • Options
  • A. 0.02 m inclined upwards
  • B. 0.04 m inclined downwards
  • C. 0.04 m inclined upward
  • D. none of these.

  • Correct Answer
  • 0.04 m inclined downwards 


  • Surveying problems


    Search Results


    • 1. The conventional sign shown in below figure represents a

    • Options
    • A. bridge carrying railway below road
    • B. bridge carrying road below railway
    • C. bridge carrying road and railway at the same level
    • D. a level crossing.
    • Discuss
    • 2. In levelling operation

    • Options
    • A. if second reading is more than first, it represents a rise
    • B. if first reading is more than second, it represents a rise
    • C. if first reading is less than second, it represents a fall
    • D. if second reading is less than first, it represents a fall
    • E. both (b) and (c).
    • Discuss
    • 3. 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
    • 4. 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
    • 5. 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
    • 6. Deviation of the actual road gradient from the proposed contou'r gradient up hill side, involves

    • Options
    • A. embankment on the centre line
    • B. excavation on the centre line
    • C. earth work on the centre line
    • D. none of these.
    • Discuss
    • 7. Pick up the correct statement from the following :

    • Options
    • A. in astronomical telescope, the rays from the object after refraction at the objective are brought to a focus before entering the eyepiece to produce a real inverted image in front of the eye piece
    • B. in Galileo's telescope, the rays from the object get refracted at the objective and are intercepted by the eyepiece before a real image is formed
    • C. a line passing through the optical centre of the objective traversing through the eyepiece, is called line of sight
    • D. the line of sight which passes through the intersection of cross-lines marked on a diaphragm fixed in front of the eyepiece in a plane at right-angles to the axis, is called the line of collimation
    • E. all the above.
    • Discuss
    • 8. The best method of interpolation of contours, is by

    • Options
    • A. estimation
    • B. graphical means
    • C. computation
    • D. all of these.
    • Discuss
    • 9. A tape of length l and weight W kg/m is suspended at its ends with a pull of P kg, the sag correction is

    • Options
    • A.
    • B.
    • C.
    • D. .
    • Discuss
    • 10. If the sight distance (S) is equal to the length of the vertical-curve (2l) joining two grades g1% and - g2%, the height of the apex will be

    • Options
    • A.
    • B.
    • C.
    • D. none of these.
    • Discuss


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