Question:

The longest of the chain lines used in making survey is generally called as

Show Hint

The Base line is the "backbone" of the entire survey.
  • Check line
  • Base line
  • Main line
  • Tie line
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The Correct Option is B

Solution and Explanation


Step 1: Concept

In chain surveying, the area is divided into a network of triangles.

Step 2: Meaning

The survey relies on a primary central line that runs through the middle of the area to be surveyed.

Step 3: Analysis

The Base line is the most important and longest line in the survey. It should be measured very accurately as the entire framework of triangles is built around it.

Step 4: Conclusion

The longest chain line is the Base line.
Final Answer: (B)
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