Which one of the following methods is adopted for permanent drainage of tunnels : Options: A . &nbspprovision of longitudinal drains B . &nbspcontinuous open drains C . &nbspconcrete lining D . &nbspgrouting with cement or chemicals E . &nbspAll the above.

Whic

Question

Which one of the following methods is adopted for permanent drainage of tunnels :

Options:

A . provision of longitudinal drains

B . continuous open drains

C . concrete lining

D . grouting with cement or chemicals

E . All the above.

Answer: Option E

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Question 2. High pressure grouting is generally restored....

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