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Q: The purpose of an open cross staff in chain survey is :
  • A. Alignment of a survey line
  • B. Setting out a line at an angle to a survey line at a point
  • C. Marking of survey stations
  • D. Setting perpendicular lines to survey lines
Correct Answer: Option D - See the above explanation.
D. See the above explanation.

Explanations:

See the above explanation.