Question
Download Solution PDFWhich of the following must be perpendicular to the vertical axis of the instrument, in context of permanent adjustment of theodolite?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
In a properly adjusted theodolite, the axis of the plate level (bubble tube) must be perpendicular to the vertical axis of the instrument. This ensures that when the plate level is centered, the vertical axis remains truly vertical.
The other options:
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Axis of the altitude level: It is not directly related to the vertical axis.
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Line of collimation: This should be horizontal when properly adjusted, but not necessarily perpendicular to the vertical axis.
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Axis of the plumb line: This coincides with the vertical axis rather than being perpendicular to it.
Thus, the Axis of the plate level must be perpendicular to the Vertical axis of the theodolite.
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