Surveying
If the intercept on a vertical staff is ob-served as 0.75 m from a tacheometer, the horizontal distance between tacheometer and staff station is

7.5 m
25 m
50 m
75 m

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Surveying
Refraction correction

adds to the curvature correction
has no effect on curvature correction
completely eliminates curvature correction
partially eliminates curvature correction

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