Surveying
Which of the following is not the function of levelling head ?

to support the main part of the instrument
to attach the theodolite to the tripod
to provide a means for leveling the theodolite
None of these

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Surveying
For a line AB

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

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Surveying
Homologous points are

Nodal points of the camera lens
Plumb points of stereo pair of photographs
Corresponding points on the ground and photograph
Opposite corners of a photograph

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