Seepage analysis MCQ

Home 

1. Hydraulic head that produce a quick condition in sand stratum of thickness of 2m, if G=2.7 and e=.7 is

A) 1.25
B) 1.50
C) 1.75
D) 2.00

... Answer is D


 

2. Seepage pressure always acts in the direction of____

A) flow
B) gravity
C) horizontal
D) None of these

... Answer is A

 

3. The pressure exerted by water on the soil particles through which it percolates is called__________

A) Permeability
B) Seepage pressure
C) Backfill pressure
D) Hydraulic pressure

... Answer is B

 

4. When seepage pressure acts in upward direction effective pressure _______

A) Doesnot change
B) Increases
C) Decreases
D) None of these

... Answer is C

 

5. Quick condition is observed in _________

A) Gravel
B) Coarse and fine sand
C) Fine sand and silt
D) Silt and clay

... Answer is C
Quick condition is generally observed in fine sand and silt. Gravel and Coarse sand though cohesionless, due to high permeability Quick condition is not observed
 

6. To prevent quick condition_________

A) Increase the depth of sheet pile
B) Lower down the surrounding water table
C) Provide inverted filters at tail end
D) All of these

... Answer is D

 

7. Critical hydraulic depth for clay is _______

A) Zero
B) One
C) Two
D) Three

... Answer is B

 

8. When permeability increases,critical hydraulic gradient _______

A) Increases
B) Decreases
C) Do not change
D) None of these

... Answer is B

 

9. Piping occurs when water bounded by an impervious structure flows______

A) Upwards
B) Downwards
C) Either case is possible
D) None of these

... Answer is A
Piping occurs when water flows upwards resulting in zero effective stress
 

10. Quick sand is _________

A) A type of sand
B) Condition in which a cohessionless soil looses its strength because of upward flow of water
C) Condition in which cohesive soil looses its strength because of upward flow of water
D) None of these

... Answer is B

 

Home 

Pages    1    2    3    4    5