1. The great circle which passes through the zenith, nadir and the poles, is known as
2. Pick up the correct statement from the following:
3. Pick up the correct statement from the following:
4. The following points form a pair of homologous points:
5. The necessary geometrical condition for triangulation adjustment is:
6. If α is the observed altitude, the refraction correction in seconds, is
7. The elevation of the star at elongation is obtained by
8. For adjusting a quadrilateral whose both the diagonals are observed, the equations of conditions involved, are
9. An imaginary line lying throughout the surface of ground and preserving a constant inclination to the horizontal is known as
10. The angle of intersection of the two plane mirrors of an optical square is
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