Surveying
The flying height of the camera is 1,000 m above mean ground level, the distance of the top of a building from a nadir point is 10 cm and the relief displacement of building is 7.2 mm. The height of the building, is

62 m
52 m
82 m
72 m

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Surveying
Normal tension is that pull which

makes the correction due to pull equal to zero
neutralizes the effect due to pull and sag
makes the correction due to sag equal to zero
is used at the time of standardising the tape

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Surveying
Bowditch rule is applied to

a closed traverse for adjustment of closing error
determine the effect of local attraction
None of these
an open traverse for graphical adjustment

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Surveying
For a line AB

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

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