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Surveying

Surveying
In a spherical triangle ABC, right angled at C, sin b equals

cos a sin A
tan a cot A
sin a cos A
cot A tan a

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Surveying
The difference of parallax for a given difference in elevation is independent of

Overall size of the photo graphs
All listed here
Focal length of the camera
Percentage of overlap

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Surveying
Which of the following angles can be set out with the help of French cross staff?

either 45° or 90°
90° only
45° only
any angle

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Surveying
The length of a parallel of λ latitude between two meridians is equal to difference in longitudes multiplied by

cot λ
cos λ
tan λ
sin λ

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Surveying
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

½ (θ - δ)
δ - θ
θ - δ
θ + δ

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Surveying
Direct method of contouring is

suitable for hilly terrains
adopted for large surveys only
most accurate method
a quick method

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