Surveying
Which of the following methods of theodolite traversing is suitable for locating the details which are far away from transit stations?

Measuring angle at one station and distance from other
Measuring angles to the point from at least two stations
Measuring distance from two points on traverse line
Measuring angle and distance from one transit station

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Surveying
Which of the following errors can be eliminated by taking mean of bot face observations ?

error due to imperfect adjustment of plate levels
error due to line of collimation not being perpendicular to horizontal axis
error due to eccentricity of verniers
error due to imperfect graduations

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