Which one of the following method is adopted as temporary drainage system for tunnel?
A. Open-ditch drainage system
B. By providing a central drain
C. By providing iron shed along with side drains
D. By providing a side drain
Answer:A
Which one of the following method is adopted as temporary drainage system for tunnel?
A. Open-ditch drainage system B. By providing a central drain C. By providing iron shed along with side drains D. By providing a side drain