Discussion
Consider the following statements about topographic survey.
1. A benchmark can be reoccupied by a later surveyor.
2. Triangulation fixes horizontal position from observed angles.
3. Levelling determines the bearing of a line from north.
Answer: C
The first two are correct. The third misstates levelling, which yields height differences; bearings are obtained with a theodolite or a compass and belong to a different operation entirely, which is why the three are treated as separate survey tasks.
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