The invented filter is provided just after the end of concrete floor to reduce () possibility of _________________?
Correct answer: C. a and b are correct
- A. Piping
- B. Under mining
- C. a and b are correct
- D. Up thrust
Explanation
Placed beyond the concrete floor, an inverted filter safely releases seepage and prevents the removal of soil particles. This reduces both piping and the resulting undermining of the structure.
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The inverted filter consists layer of materials of increasing ______________ from bottom to top?
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