Surveying
Homologous points are

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

ANSWER DOWNLOAD EXAMIANS APP

Surveying
Normal tension is that pull which

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

ANSWER DOWNLOAD EXAMIANS APP