Civil Engineering - Tunnelling - Discussion

Discussion :: Tunnelling - Section 1 (Q.No.40)

40. 

The length of the needle beam used in needle beam method of tunnelling is usually

[A]. 2 m to 4 m
[B]. 2.5 m to 6 m
[C]. 4 m to 7 m
[D]. 5 m to 6 m

Answer: Option D

Explanation:

No answer description available for this question.

Hbk said: (Apr 20, 2021)  
It is the standard length of the needle beam.
i.e) 5-6 m.

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