Surveying
The great circle whose plane is perpendicular to the axis of rotation of the earth, is called

Terrestrial equator
Equator
0° latitude
All of these

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Surveying
The meridian of a place is

A great circle passing through the place and the poles
A semi-circle which passes through the place and is terminated at the poles
An arc of the great circle which passes through the place and is perpendicular to the equator
A great circle whose plane is perpendicular to the axis of rotation and it also passes through the place

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Surveying
Homologous points are

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

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Surveying
Accidental errors

Do not follow any definite mathematical law
Cannot be removed by applying corrections to the observed values
All of these
Are generally small

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