Civil Engineering :: Surveying
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If the smallest division of a vernier is longer than the smallest division of its primary scale, the vernier is known as
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Cross-staff is used for
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The 'point of curve' of a simple circular curve, is
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For orientation of a plane table with three points A, B and C, Bessel's drill is
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The minimum range for sliding the focusing lens in the internal focusing telescope for focusing at all distances beyond 4 m is
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Pick up the correct statement from the following :
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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
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Ramsden eye-piece consists of
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The distance between steps for measuring down hill to obtain better accuracy
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The tangent to the liquid surface in a level tube, is parallel to the axis of the level tube at
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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 |
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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 |
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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 |
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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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A.
in the earth's magnetic field, a magnetic needle rests in magnetic meridian |
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B.
the angle between the true meridian and the magnetic meridian is called magnetic variation |
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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 |
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D.
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E.
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