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Q: The line joining some fixed points termed as tie stations on main survey line is called
  • A. Base line
  • B. Check line
  • C. Proof line
  • D. Tie line
Correct Answer: Option D - Tie line– A line joining some fixed points (termed as tie station) on the main survey line. A tie line usually fulfills a dual purpose, i.e. it checks the accuracy of the framework and enables the survey to locate the interior details which are for away from the main chain lines. It can also serve the purpose of a check line.
D. Tie line– A line joining some fixed points (termed as tie station) on the main survey line. A tie line usually fulfills a dual purpose, i.e. it checks the accuracy of the framework and enables the survey to locate the interior details which are for away from the main chain lines. It can also serve the purpose of a check line.

Explanations:

Tie line– A line joining some fixed points (termed as tie station) on the main survey line. A tie line usually fulfills a dual purpose, i.e. it checks the accuracy of the framework and enables the survey to locate the interior details which are for away from the main chain lines. It can also serve the purpose of a check line.