Surveying
Homologous point is

Ground isocenter
Ground principal point
All listed here
Photo principal point

ANSWER DOWNLOAD EXAMIANS APP

Surveying
If the lower clamp screw is tightened and upper clamp screw is loosened, the theodolite may be rotated

on its outer spindle without a relative motion between the vernier and gra-duated scale of lower plate
on its outer spindle with a relative motion between the vernier and graduated scale of lower plate
on its inner spindle without a relative motion between the vernier and the graduated scale of lower plate
on its inner spindle with a relative motion between the vernier and the graduated scale of lower plate

ANSWER DOWNLOAD EXAMIANS APP