Q.

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 graduated 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. on its inner spindle with a relative motion between the vernier and the graduated scale of lower plate
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