Surveying
Homologous points are

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

ANSWER DOWNLOAD EXAMIANS APP

Surveying
Refraction correction

completely eliminates curvature correction
has no effect on curvature correction
partially eliminates curvature correction
adds to the curvature correction

ANSWER DOWNLOAD EXAMIANS APP

Surveying
Accidental errors

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

ANSWER DOWNLOAD EXAMIANS APP