Question:medium

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 adjusts a theodolite's horizontal axis, ensuring it is perpendicular to the vertical axis. This perpendicularity is crucial for accurate angular surveying.

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For which of the following permanent adjustments of a theodolite is the spire test used

Show Hint

The Correct Option is C

Solution and Explanation

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