Surveying
The relief displacement of a building 72 m high on photograph is 7.2 mm and its top appears 10 cm away from principal point. The flying height of the camera, is

2000 m
500 m
1500 m
1000 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 eccentricity of verniers
error due to displacement of station signals
error due to inaccurate graduation
error due to wrong adjustment of line of collimation and trunnion axis

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Surveying
For a line AB

the forebearing of AB and back bearing of AB differ by 180°
none is correct
the forebearing of AB and back bearing of BA differ by 180°
both (A) and (B) are correct

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