WorksheetsDay 78-Dec 13-Worksheet-Btech-Effective stress in soil
Total questions: 15
Worksheet time: 10mins
In the capillary zone above the water table, which statement is correct?
Total stress decreases and pore pressure is positive
Total stress increases and pore pressure is positive
Total stress increases and pore pressure is negative
Total stress remains constant and pore pressure is zero
Neutral stress in a soil mass refers to:
Stress taken up by solid particles
Stress taken up by pore water
Shear stress on soil particles
Stress causing settlement only
Effective stress at any plane in soil is:
σ' = σ + u
σ' = u − σ
σ' = σ − u
σ' = γwH − σ
Pore water pressure in capillary zone is:
(a)
At any plane, pore pressure is equal to:
(Piezometric head)/(yw)
(Piezometric head) × (unit weight of water)
(yw)/(piezometric head)
None
Total pressure in soil mass consists of distinct components:
1
2
3
5
Rise of water table above ground surface causes:
Equal increase in pore water pressure and total stress
Equal decrease in pore water pressure and total stress
Increase in pore water pressure but decrease in total stress
Decrease in pore water pressure but increase in total stress
Pore water pressure in the capillary zone is negative.
True
False
Adsorbed water can freely move under gravity.
True
False
Effective stress is equal to total stress minus ________ pressure.
pore water
atmospheric
osmotic
hydrostatic
Pore pressure at any plane is given by u = ________ × H.
yw
γw
σv
E
Total stress in soil is the sum of effective stress and (a) .
Structural water is (a) combined with crystalline structure and not available to plants.
A soil has void ratio e = 0.5 and effective size D10 = 0.015 mm. Take C = 30 mm².
Find maximum capillary rise hc.
(a)
Find total stress (σ) and effective stress (σ′) at 5 m below top water level in a swimming pool.
(a)
