Question:
For which of the following permanent adjustments of a theodolite is the spire test used
For which of the following permanent adjustments of a theodolite is the spire test used
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The spire test ensures the horizontal axis is correctly aligned for reliable and accurate theodolite readings
Updated On: Jan 17, 2026
- Adjustment of plate levels
- Adjustment of line of sight
- Adjustment of horizontal axis
- Adjustment of altitude bubble and vertical index frame
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The Correct Option is C
Solution and Explanation
The spire test is conducted to adjust the horizontal axis of a theodolite. This ensures that the horizontal axis is truly perpendicular to the vertical axis, which is essential for accurate angular measurements in surveying
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