Surveying
A star in northern sphere is said to transit

When its altitude is maximum
All listed here
When its azimuth is 180°
When it is in south

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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 eccentricity of verniers
error due to inaccurate graduation

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