Correct distance obtained by an erroneous chain is: none of these.

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Question
Correct distance obtained by an erroneous chain is:
Options
A.
B.
C.
D. none of these.

Correct Answer

Surveying problems

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1. Grid lines are parallel to
Options
A. magnetic meridian of the central point of the grid
B. line representing the central true meridian of the grid
C. geographical equator
D. none of these.

2. The formula for the horizontal distances for inclined sights, on staff held normalis
s cos ? + (f + d) cos ? � h sin ?
Options
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. non of these.

3. If ? is the angle between the polar ray and the tangent at the point of commencement of a lemniscate curve, the equation of the curve, is
Options
A. l = ksin ?
B. l = ksin 2?
C. l = ksin 3?
D. l = ktan 2?
E. l = kcos 2?

4. Pick up the correct statement from the following :
Options
A. if the image of the object does not fall on the plane of the cross-lines, parallax exists
B. parallax has nothing to do with the eyepiece
C. the eyepiece is adjusted for clear vision of the cross hairs
D. all the above.

7. The method of finding out the difference in elevation between two points for eliminating the effect of curvature and refraction, is
Options
A. reciprocal levelling
B. precise levelling
C. differential levelling
D. flying levelling

8. Accuracy of elevation of various points obtained from contour map is limited to
Options
A. of the contour interval
B. th of the contour interval
C. rd of the contour interval
D. th of the contour interval.

9. Flint glass
Options
A. has slightly the greater refracting power than crown glass
B. has roughly double refracting power than that of crown
C. and crown glass proportions yield the required focal length and neutralise the dispersion produced by the convex lens at the emergence from the concave
D. all the above.

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