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Civil Engineering :: Surveying

  1. If the smallest division of a vernier is longer than the smallest division of its primary scale, the vernier is known as

  2. A.

    direct vernier

    B.

    double vernier

    C.

    retrograde vernier

    D.

    simple vernier.

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  3. Cross-staff is used for

  4. A.

    setting out right angles

    B.

    measuring contour gradient

    C.

    taking levels

    D.

    measuring distances

    E.

    none of these

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  5. The 'point of curve' of a simple circular curve, is

  6. A.

    point of tangency

    B.

    point of commencement

    C.

    point of intersection

    D.

    mid-point of the curve

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  7. For orientation of a plane table with three points AB and C, Bessel's drill is

  8. A.

    Align b through a and draw a ray towards c, align a through b and draw a ray towards c, finally align c through the point of intersection of the previously drawn rays

    B.

    Align c through a and draw a ray towards b, align a through c and draw a ray towards b, finally align b through the point of intersection of the previously drawn rays

    C.

    Align c through b and draw a ray towards a, align b through c and draw a ray towards a, finally align a, through the point of intersection of the previously, drawn rays

    D.

    In the first two steps any two of the points may be used and a ray drawn towards the third point, which is sighted through the point of intersection of previously drawn rays in the final step.

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  9. The minimum range for sliding the focusing lens in the internal focusing telescope for focusing at all distances beyond 4 m is

  10. A.

    5 mm

    B.

    10 mm

    C.

    15 mm

    D.

    20 mm.

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  11.  

    Pick up the correct statement from the following :

  12. A.

    in the earth's magnetic field, a magnetic needle rests in magnetic meridian

    B.

    the angle between the true meridian and the magnetic meridian is called magnetic variation

    C.

    one end of the magnetic needle supported at its centre of gravity tends to dip down towards the. nearer magnetic pole of the earth

    D.
    the magnet properly pivoted is balanced by means of riding weight movable along the needle
    E.
    all the above.

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  13. The formula for the horizontal distances for inclined sights, on staff held normalis \(\frac { f } { i } \) s cos θ + (f + d) cos θ ± h sin θ

  14. A.

    minus sign is used for angle of depression

    B.

    plus sign is used for angle of depression

    C.

    minus sign is used for angle of elevation

    D.

    none of these.

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  15.  

    Ramsden eye-piece consists of

  16. 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.

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  17. The distance between steps for measuring down hill to obtain better accuracy

  18. A.

    decreases with decrease of slope

    B.

    increases with increase of slope

    C.

    decreases with increase of slope

    D.

    decreases with decrease of weight of the chain.

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  19. The tangent to the liquid surface in a level tube, is parallel to the axis of the level tube at

  20. A.

    every point of the bubble

    B.

    either end of the bubble

    C.

    the mid-point of the bubble

    D.

    no where.

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