Civil Engineering :: Surveying
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The diaphragm of a stadia theodolite is fitted with two additional
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Centering error of a theodolite produces an error
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In levelling operation
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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
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Pick up the correct statement from the following :
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The operation of making the algebraic sum of latitudes and departures of a closed traverse, each equal to zero, is known
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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
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Orientation of a plane table by solving two point problem is only adopted when
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A back sight
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If the area calculated form the plan plotted with measurements by an erroneous chain, accurate area of the plan is
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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 |
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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 forme |
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C.
a line passing through the optical centre of the objective traversing through the eyepiece, is called line of sight |
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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 |
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E.
all the above. |
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A.
measured area x \( \frac { \text{ length of chain used} } { \text{ nominal chain length}} \) |
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B.
measured aresa x \( \frac { \text {nominal chain length} } {\text{length of chain used} } \) |
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C.
measured area x \([ \frac { \text{ nominal chain lemgth} } { \text{length of chain used}} ]^2\) |
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D.
measued area x \([ \frac { \text{ length of chain used} } { \text{ nominal chain length}} ]^2\) |
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E.
none of the above |