Surveying
The adjustment of horizontal cross hair is required particularly when the instrument is used for

measurement of horizontal angles
leveling
All of these
prolonging a straight line

ANSWER DOWNLOAD EXAMIANS APP

Surveying
Homologous points are

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

ANSWER DOWNLOAD EXAMIANS APP