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Tunnelling

Q1: 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
1 second theodolite is used for angular measurement to achieve an angular error of 15 N where N is number of angles

E All the above.

ANS:E - All the above.

No answer description is available.



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