Which statement best describes a permanent adjustment of a theodolite?
Correct answer: B. It establishes the required relation between instrument axes
- A. It levels the instrument at each station
- B. It establishes the required relation between instrument axes
- C. It focuses the telescope on a particular staff
- D. It sets the initial reading of the horizontal circle
Explanation
Permanent adjustment establishes and maintains the correct geometric relationships among the theodolite axes. Levelling, focusing, and setting circle readings are temporary operations performed during individual instrument setups.
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About Surveying
Surveying covers measurement of distances, angles and elevations, traversing, levelling, contouring, plane table work, theodolites, total stations and basic photogrammetry. It includes error adjustment, coordinate calculations, area and volume determination, and the distinction between accuracy and precision, as well as between temporary and permanent adjustments.
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