Tunnel Engineering

Pick up the correct statement from the following:

  • A. The topographical maps of the Survey of India are useful in the mountainous region for tunnelling
  • B. The height point on the ridge is fixed with the help of reciprocal ranging
  • C. The accuracy of 1 in 10,000 is required for planimetric control
  • D. All the above
Answer: Option D.
Explanation: 

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