Q. If the lower clamp screw is tightened and upper clamp screw is loosened, the theodolite may be rotated (Solved)
1. on its outer spindle with a relative motion between the vernier and graduated scale of lower plate
2. on its outer spindle without a relative motion between the vernier and graduated scale of lower plate
3. on its inner spindle with a relative motion between the vernier and the graduated scale of lower plate
4. on its inner spindle without a relative motion between the vernier and the graduated scale of lower plate
- c. on its inner spindle with a relative motion between the vernier and the graduated scale of lower plate