Civil Engineering - Surveying - Discussion

Discussion Forum : Surveying - Section 3 (Q.No. 18)
While rotating the theodolite in the horizontal plane, the bubble of the bubble tube takes up the same position in its tube, it indicates
the rotation axis is vertical
the trummion axis is horizontal
the line of collimation is perpendicular to vertical axis
none of the above
Answer: Option
No answer description is available. Let's discuss.
4 comments Page 1 of 1.

Kesavan said:   6 years ago
C also correct option.

Rajesh said:   6 years ago
Please explain the answer.

Pankaj said:   5 years ago
Option C is also correct.

Fakhar Naveed said:   2 months ago
An axis about which the telescope can be rotated in a horizontal plane is Vertical Axis.

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