Civil Engineering :: Surveying
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Pick up the correct statement from the following :
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If Δ is the angle of deflection of a simple curve of radius R, the length of its long chord, is
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In geodetic surveys higher accuracy is achieved, if
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Determining the difference in elevation between two points on the surface of the earth, is known as
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Contours of different elevations may cross each other only in the case of
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The radius of a simple circular curve is 300 m and length of its specified chord is 30 m. The degree of the curve is
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During levelling if back sight is more than foresight
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Two contour lines, having the same elevation
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The Trapezoidal rule of volumes V of an embankment divided into a number of sections equidistant D, is given by
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The surface of zero elevation around the earth, which is slightly irregular and curved, is known as
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The lens equation \(\frac { 1 } { f } \) = \(\frac { 1 } { f1 } \)+\(\frac { 1 } { f2 } \)is applicable
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The representation of general topography of a very flat terrain is possible only
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The bearing of line AB is 152° 30' and angle ABC measured clockwise is 124° 28'. The bearing of BC is
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A transit is oriented by setting its vernier A to read the back azimuth of the preceding line. A back sight on the preceding transit station taken and transit is rotated about its vertical axis. The vernier A reads
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Correction per chain length of 100 links along a slope of α radians, is
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While working on a plane table, the correct rule is :
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Pick up the correct statement from the following
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In case of a double line river, contours are
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In case of a direct vernier scale
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A.
The directions of plumb lines suspended at different points in a survey are not strictly parallel |
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B.
In surveys of small extent, the effect of curvature may be ignored and the level surface of the earth is assumed as horizontal |
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C.
In surveys of large extent, the effect of curvature of the earth must be considered |
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D.
All the above. |
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A.
V = D \([ \frac { A1 +An } { 2 } \)+ A2 +A3 +.....An-1] |
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B.
V =\( \frac {D} { 2 } \)\([\frac { A1+An } {4 } \)+A2 +A3 +.......An -1] |
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C.
V = \( \frac {D} { 2 } \)[ [A1 + An + 2(A2 + A4 + ... + An - 1) + 4(A3 + A5 + ... + An -- 2)] |
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D.
V = \( \frac {D} { 2 } \) [A1 + An + 4(A2 + A4 + ... + An - 1) + 4(A3 + A5 + ... + An - 2)] |
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A.
the contour lines having the same elevation cannot unite and continue as one line |
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B.
a contour can not end abruptly, but must ultimately close itself not necessarily within the limits of map. |
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C.
the direction of steepest slope at a point on a contour is at right angles to the contour |
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D.
all the above. |