Civil Engineering - Advanced Surveying

Exercise :: Advanced Surveying - Section 1

36. 

The angle between the axis of earth and the vertical at the station of observation is called

A. astronomical latitude
B. astronomical co-latitude
C. co-declination of star
D. declination of star.

Answer: Option B

Explanation:

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37. 

For any star to be a circumpolar star, its

A. declination must be 0°
B. declination must be 90°
C. distance from the pole must be less than the latitude of the observer
D. hour angle must be 180°.

Answer: Option C

Explanation:

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38. 

The elevation of the star at elongation is obtained by

A. sin α = sin φ cosec δ
B. sin α = sin φ sec δ
C. sin α = cos φ sec δ
D. sin α = cos φ cosec δ.

Answer: Option A

Explanation:

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39. 

The necessary geometrical condition for triangulation adjustment, is :

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.

Answer: Option D

Explanation:

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40. 

The correction applied to the measured base of length L is

A.
B. where w is the weight of tape/m
C. where h is height difference of end supports
D. Reduction to mean sea level =
E. all the above.

Answer: Option E

Explanation:

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