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Civil Engineering Objective Questions { Advanced Surveying }



22. Pick up the correct statement from the following :
A. Centre of the celestial sphere is taken as the position of the observer
B. Centre of the celestial sphere is taken as the centre of the earth
C. stars move and maintain their relative positions
D. All the above.

23. The zenith is the point on the celestial sphere
A. east of observer
B. west of observer
C. north of observer
D. south of observer

24. The point on the celestial sphere vertically below the observer's position, is called
A. zenith
B. celestial point
C. nadir
D. pole.

25. The plane at right angle to the zenith-nadir line and passing through the centre of the earth, is called
A. rational horizon
B. true horizon
C. celestial horizon
D. all the above.

26. The circle in which a plane tangent to the earth's surface at the point of observation, intersects the celestial sphere, is called
A. visible horizon
B. sensible horizon
C. celestial horizon
D. true horizon

27. Pick up the correct statement from the following :
A. North end of the polar axis is known as north pole
B. South end of the polar axis is known as south pole
C. Point where polar axis when produced northward intersects the celestial-sphere, is known as north celestial pole
D. all the above.

28. The great circle along which the sun appears to trace on the celestial sphere with earth as centre during the year, is called
A. equator
B. celestial equator
C. ecliptic
D. none of these.

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