27. If θ and δ be the latitude of a place and declination of a star respectively, the upper culmination of the star will be north of zenith if its zenith distance, is
28. In a tropical year, the number of sidereal days are
29. The position of a heavenly body on the celestial sphere can be completely specified by
30. The angle between the axis of earth and the vertical at the station of observation is called
31. For any star to be a circumpolar star, its
32. The elevation of the star at elongation is obtained by
33. The necessary geometrical condition for triangulation adjustment, is :
34. The release of the egg/ovum from the ovary is called?
35. The angle between the direction of star and the direction of earth's axis of rotation is called
36. Which lens is used as magnifying glas?
37. The circle in which a plane tangent to the earth's surface at the point of observation, intersects the celestial sphere, is called
38. If θ and δ be the latitude of an observer and declination of a heavenly body respectively, the upper culmination of the body will be south of zenith if its zenith distance, is
39. Invar tapes used for measuring base lines, is made of nickel-iron alloy containing nickel
40. Triangulation surveys are carried out for locating
41. The movement of the projector in y-direction, introduces in the model a y-parallax
42. In field astronomy, the quantities observed are entirely
43. The orthogonal projection of the perspective centre on a tilted photograph, is called
44. The principal plane contains
45. The point where vertical line passing through the perspective centre intersects the plane of the photograph, is known as
46. An aerial photograph may be assumed as
47. If the equatorial distance between two meridians is 100 km, their distance at 60° latitude will be
48. The rate of change of parallax dp/dh with respect to change in h, may be expressed as
49. The displacement of the pictured position of a point of h elevation on a vertical photograph taken with a camera of 30 cm focal length, from an altitude of 3000 m, is
50. The net ground area of a vertical photograph 20 cm x 20 cm on scale 1 : 10,000 having overlaps 60% and 30%, is