While making astronomical observations, the observer is mainly concerned with th

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Question
While making astronomical observations, the observer is mainly concerned with
Options
A. the direction of the vertical, the axis of rotation of the instrument
B. the direction of the poles of the celestial sphere
C. the direction of the star from the instrument
D. all the above.

Correct Answer

all the above.

Advanced Surveying problems

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1. The movement of the projector in y-direction, introduces in the model a y-parallax
Options
A. maximum at position 1
B. maximum at position 2
C. maximum at position 5 and 6
D. maximum at positions 3 and 4
E. equally throughout the model.

2. Accidental errors
Options
A. do not follow any definite mathematical law
B. cannot be removed by applying corrections to the observed values
C. are generally small
D. are also known as compensating errors
E. all the above.

4. Triangulation surveys are carried out for locating
Options
A. control points for surveys of large areas
B. control points for photogrammetric surveys
C. engineering works, i.e. terminal points of long tunnels, bridge abutments, etc.
D. all the above.

5. The necessary geometrical condition for triangulation adjustment, is :
Options
A. The sum of the angles around a station should be 360�
B. The sum of the three angles of a plane triangle should be 180�
C. The sum of the eight angles of a braced quadrilateral should be 360�
D. All the above.

6. The angle between the axis of earth and the vertical at the station of observation is called
Options
A. astronomical latitude
B. astronomical co-latitude
C. co-declination of star
D. declination of star.

8. If ?, H, A and ? be the altitude, hour angle, azimuth and declination of a circumpolar star at its elongation, in latitude ?, the following relation holds good
Options
A.
B.
C.
D. all the above.

10. The shortest distance between two places measured along the surface of the earth, is
Options
A. length of the equator between their longitudes
B. length of the parallel between their longitudes
C. length of the arc of the great circle passing through them
D. none of these.

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