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Q: ______ is resorted to when both the ends of the survey line are not intervisible either due to high intervening ground or due to long distance between them.
  • A. Unfold ranging
  • B. Direct ranging
  • C. Reciprocal ranging
  • D. Mark ranging
Correct Answer: Option C - Indirect or reciprocal ranging– Indirect or reciprocal ranging is resorted to when both the ends of the survey line are not intervisible either due to high intervening ground or due to long distance between them. Direct ranging– It is applicable when the two ends of the survey lines are intervisible.
C. Indirect or reciprocal ranging– Indirect or reciprocal ranging is resorted to when both the ends of the survey line are not intervisible either due to high intervening ground or due to long distance between them. Direct ranging– It is applicable when the two ends of the survey lines are intervisible.

Explanations:

Indirect or reciprocal ranging– Indirect or reciprocal ranging is resorted to when both the ends of the survey line are not intervisible either due to high intervening ground or due to long distance between them. Direct ranging– It is applicable when the two ends of the survey lines are intervisible.