1. Rise of water table above the ground surface ____.
[A] Equal increase in pore water pressure and total stress
[B] Equal decrease in pore water pressure and in total stress
[C] Increase in pore water pressure but decrease in total stress
[D] Decrease in pore water pressure but increase in total stress
Answer: Option C
2. Piping occurs when ____.
[A] Effective stress is zero
[B] Flow is downwards
[C] Flow is upwards
[D] Flow is horizontal
Answer: Option A
3. Consider the following statements:
(i) Quicksand is a special variety of sand
(ii) Quicksand is not a material but a hydraulic condition.
(iii) In nature, quicksand condition is observed usually in coarse silt or fine sand. Which of the above statements are correct?
[A] (i), (ii) and (iii)
[B] (i) and (ii)
[C] (ii) and (iii)
[D] (i) and (iii)
Answer: Option C
4. Hydrostatic pressure on the phreatic line within a dam section
[A] Gradually decreases
[B] Is less than atmospheric pressure
[C] is equal to atmospheric pressure
[D] is greater than atmospheric pressure
Answer: Option C
5. The Westergaard analysis is used for
[A] Sandy soils
[B] Stratified soils
[C] Cohesive soils
[D] Clayey soils
Answer: Option B