The main principle of surveying is to work
One of the tacheometric constants is additive, the other constant, is
Keeping the instrument height as 1.5 m, length of staff 4 m, the slope of the ground as 1 inthe sight on the down-slope, must be less than
In chain surveying tie lines are primarily provided
Pick up the method of surveying in which field observations and plotting proceed simultaneously from the following
The 'fix' of a plane table station with three known points, is bad if the plane table station lies
The accuracy of measurement in chain surveying, does not depend upon
True meridians are generally preferred to magnetic meridians because
For the construction of highway (or railway)
The limiting length of an offset does not depend upon
Pick up the correct statement from the following :
While viewing through a level telescope and moving the eye slightly, a relative movement occurs between the image of the levelling staff and the cross hairs. The instrument is
The bearings of the lines AB and BC areand30'. The included angle ABC is
If R is the radius of the main curve, θ the angle of deflection, S the shift and L the length of the transition curve, then, total tangent length of the curve, is
If the radius of a simple curve is R, the length of the chord for calculating offsets by the method of chords produced, should not exceed.
Closed contours of decreasing values towards their centre, represent
If θ is the slope of the ground and l is the measured distance, the correction is
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