Civil Engineering > GATE 2024 SET-1 > Theodolite Surveying
Among the following statements relating the fundamental lines of a transit theodolite, which one is CORRECT?
A
The line of collimation must be perpendicular to the horizontal axis at its
B
The vertical axis must be perpendicular to the line of collimation.
C
The horizontal axis and the line of collimation must lie in a plane parallel to the vertical axis.
D
The Vernier of vertical circle must read zero when the line of collimation is vertical.

Correct : b

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