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Spire test is used for the permanent adjustment of a theodolite for:
Question

Spire test is used for the permanent adjustment of a theodolite for:

A.

Adjustment of horizontal axis

B.

Adjustment of vertical axis

C.

Adjustment of plate levels

D.

Adjustment of line of sight

Correct option is A

Spire test involves making some adjustments in horizontal hair of instruments cross- hair, for taking precise horizontal measurement.

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