In a transit theodolite, transiting the telescope means rotating it through:
Correct answer: B. A horizontal axis by 180 degrees
- A. A horizontal axis by 90 degrees
- B. A horizontal axis by 180 degrees
- C. A vertical axis by 180 degrees
- D. A vertical axis by 360 degrees
Explanation
Transiting, or plunging, turns the telescope about its horizontal axis through 180 degrees. It changes the face of the instrument and is used in several observation procedures and adjustments.
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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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