Civil Engineering - Advanced Surveying

Exercise :: Advanced Surveying - Section 4

46. 

If δ is the declination of the star and φ is the latitude of the observer then the hour angle of the star at elongation is given by

A. sin H = tan φ . cot δ
B. cos H = tan φ . cot δ
C. tan H = tan φ . cot δ
D. none of these.

Answer: Option B

Explanation:

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47. 

At upper culmination, the pole star moves

A. eastward
B. westward
C. northward
D. southward.

Answer: Option B

Explanation:

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48. 

G.M.T. corresponding to given mean time, equals

A. L.M.T. - East longitude in time
B. L.M.T. + East longitude in time
C. L.M.T. - West longitude in time
D. none of the these.

Answer: Option A

Explanation:

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49. 

Pick up the correct statement from the following :

A. the sun's right ascension increases for 0 h to 24 h when it returns to the First point of Aries
B. the maximum declination of the sun increases up to 23° N on about 21st June
C. the minimum declination of the sun is zero' on 22nd September
D. the maximum declination of the sun is about 23° S on 21st December
E. all the above.

Answer: Option E

Explanation:

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50. 

Latitude of the observer's position is equal to altitude of

A. north pole
B. pole star
C. celestial pole
D. all the above.

Answer: Option C

Explanation:

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