The pore water pressure on the phreatic surface is
- A0 kPa (absolute)
- B0 kPa (gauge)Correct
- C100 kPa (gauge)
- DNone of these
Solution
Concept
Pore pressure at the water table
Step-by-step solution
1. At the water table, gauge pore pressure is zero.
Explanation
The pressure equals atmospheric, i.e. zero gauge.
Why the other options are wrong
Absolute pressure is not zero.
Shortcut
WT: u = 0 gauge.
Correct answer: B) 0 kPa (gauge)