GEO TERMS: VERTICAL STRESS IN SOIL

Question 1

rise of water table above the ground surface causes _____

A. equal increase in pore water pressure and total stress
B. equal decrease in pore water pressure and 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 1

A. equal increase in pore water pressure and total stress

Question 2

the effective stress on soil…

A. increases voids ratio and decreases permeability
B. increases both voids ratio and permeability
C. decreases both voids ratio and permeability
D. decreases voids ratio and increases permeability

Answer 2

C. decreases both voids ratio and permeability

Question 3

the neutral stress in a soil mass is _____

A. force per neutral area
B. force per effective area
C. stress taken up by the pore water
D. stress taken up by solid particles

Answer 3

C. stress taken up by the pore water

Question 4

a flow net may be utilized for the determination of _____

A. exit gradient
B. seepage
C. hydrostatic pressure
D. all the above

Answer 4

D. all the above

Question 5

pick up the correct statement from the following:

A. when stress decreases, void, ratio decreases

B. when stress decreases, coefficient of permeability decreases

C. when stress decreases, coefficient of volume change decreases

D. when stress decreases void ratio, coefficients of permeability and volume change decrease

Answer 5

D. when stress decreases void ratio, coefficients of permeability and volume change decrease

Question 6

the pressure that builds up in pore water due to load increment on the soil is termed _____

A. excess pore pressure
B. excess hydrostatic pressure
C. hydrodynamic pressure
D. all the above

Answer 6

D. all the above

Question 7

a phreatic line is defined as the line within a dam section below which there are _____

A. positive equipotential lines
B. positive hydrostatic pressure
C. negative hydrostatic pressure
D. negative equipotential lines

Answer 7

B. positive hydrostatic pressure

Question 8

the ultimate consolidation settlement of a soil is _____

A. directly proportional to the voids ratio
B. directly proportional to the compression index
C. inversely proportional to the compression index
D. none of the above

Answer 8

B. directly proportional to the compression index

Question 9

the capillary rise of water…

A. depends upon the force responsible
B. increases as the size of the soil particles increases
C. decreases as the size of the soil particles decreases
D. is less in wet soil than in dry soil

Answer 9

A. depends upon the force responsible

Question 10

the Westergaard analysis is used for _____

A. sandy soils
B. cohesive soils
C. stratified soils
D. clayey soils

Answer 10

C. stratified soils