Discussion :: UPSC Civil Service Exam Questions
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Which one of the following is considered to be an advantage of the heading and benching method of tunes construction ?
A.
It is suitable for construction in unstable rocks
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B.
In this method, it is easy to install timber support
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C.
Tunnelling can be continous and the work can be expedited
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D.
In case of excessive water, it is easy to take corrective steps
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