2.65

2.72

2.85

2.9

The phenomenon of quicksand generally occurs in the cohesionless soil

At critical hydraulic gradient, the saturated sand becomes quick

The critical gradient depends on the void ratio and the specific gravity

All the above

show dilatancy

swell when moist

possess high strength when dry

disintegrate easily.

quantity of seepage

hydrostatic pressure

seepage pressure

all the above.

q times the lateral pressure within the surface

1/q times the lateral pressure within the surface

equal to a fill of height Z equal to q/r, where r is the density of the backfill

none of these.