If the lower clamp screw is tightened and upper clamp screw is loosened, the theodolite may be rotated
A. on its outer spindle with a relative motion between the vernier and graduated scale of lower plate
B. on its outer spindle without a relative motion between the vernier and gra-duated scale of lower plate
C. on its inner spindle with a relative motion between the vernier and the graduated scale of lower plate
D. on its inner spindle without a relative motion between the vernier and the graduated scale of lower plate
Answer:C
If the lower clamp screw is tightened and upper clamp screw is loosened, the theodolite may be rotated
A. on its outer spindle with a relative motion between the vernier and graduated scale of lower plate B. on its outer spindle without a relative motion between the vernier and gra-duated scale of lower plate C. on its inner spindle with a relative motion between the vernier and the graduated scale of lower plate D. on its inner spindle without a relative motion between the vernier and the graduated scale of lower plate