In levelling, a rise and fall computation determines the difference in elevation between consecutive points from:
Correct answer: A. The difference between consecutive staff readings
- A. The difference between consecutive staff readings
- B. The sum of all backsights only
- C. The difference between consecutive bearings
- D. The product of the staff readings
Explanation
In the rise and fall method, a smaller succeeding staff reading indicates a rise, while a larger reading indicates a fall. The elevation difference equals the difference between the two consecutive readings.
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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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