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

50 m
75 m
7.5 m
25 m

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Surveying
Which of the following errors is not eliminated by the method of repetition of horizontal angle measurement ?

error due to wrong adjustment of line of collimation and trunnion axis
error due to displacement of station signals
error due to inaccurate graduation
error due to eccentricity of verniers

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