If the back fill is having a uniform surcharge of intensity q per unit area, the lateral pressure will be
-
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.
Transporting and redepositing soils, is done by
-
water -
glacier -
gravity -
wind -
all the above.
A soil sample has passing 0.mm sieve =liquid limit =and plastic limit = 40%. The group index of the soil, is
-
5 -
20 -
40 -
none of these.
The compression resulting from a long term static load and consequent escape of pore water, is known as
-
compaction -
consolidation -
swelling -
none of these.
The void ratio of a soil sample decreases from 1.to 1.when the pressure is increased fromtonnes/m2 totonnes/m2, the coefficient of compressibility is
-
0.01 -
0.02 -
0.05 -
0.001
Depending upon the properties of a material, the failure envelope may
-
be either straight or curved -
pass through the origin of stress -
intersect the shear stress axis -
all the above.
A sample of saturated soil haswater content and the specific gravity of soil grains is 2.The dry density of the soil mass in g/cm3, is
-
1.47 -
1.82 -
1.91 -
none of these.
Pick up the correct statement from the following:
-
Isotropic consolidation of clay can be obtained in the triaxial apparatus under equal all-round pressure. -
If the present effective stress is the maximum to which the clay has ever been subjected, it is called normally consolidated clay -
If the present effective stress in the past was more than present effective stress, it is called over-consolidated clay -
All the above.
A moist soil sample of volumecc. weighsg and its dried weight is 86.4 g. If its absolute density is 2.the degree of saturation is
-
54% -
64% -
74% -
84%
The plasticity index is the numerical difference between
-
liquid limit and plastic limit -
plastic limit and shrinkage limit -
liquid limit and shrinkage limit -
none of these.
Soil classification of composite soils, exclusively based on the particle size distribution, is known
-
particle classification -
textural classification -
High Way Research Board classification -
unified soil classification.
The specific gravity of sands, is approximately
-
1.6 -
2.0 -
2.2 -
2.4 -
2.6
The ratio of the volume of voids to the total volume of the given soil mass, is known
-
porosity -
specific gravity -
void ratio -
water content.
If the coefficients of volume change and compressibility of a soil sample are respectively 6.x 10-2 and 3 x 10-2, the void ratio of the soil sample, is
-
1.10 -
1.15 -
1.20 -
1.25 -
1.30
Pick up the correct statement from the following:
-
Isotropic consolidation of clay can be obtained in the triaxial apparatus under equal all-round pressure. -
If the present effective stress is the maximum to which the clay has ever been subjected, it is called normally consolidated clay -
If the present effective stress in the past was more than present effective stress, it is called over-consolidated clay -
All the above.
A moist soil sample of volumecc. weighsg and its dried weight is 86.4 g. If its absolute density is 2.the degree of saturation is
-
54% -
64% -
74% -
84%
The angle between the directions of the failure and the major principal plane, is equal to
-
90° + effective angle of shearing resistance -
90° + half of the angle of shearing resistance -
45° - half of the angle of shearing resistance -
45° + half of the angle of shearing resistance.
The shear resistance of a soil is con-tituted basically of the following component.
-
The frictional resistance to translocation between the individual soil particles at their contact point -
To the structural relation to displacement of the soil because of the interlocking of the particles -
Cohesion and adhesion between the surfaces of the soil particles -
All the above.
g of wet soil was taken in a pycnometer jar of weightg in order to find the moisture content in the soil, with specific gravity of soil particles 2.The weight of soil and remaining water filled in pycnometer without air bubbles wasg and the weight of pycnometer filled with water alone wasg. The moisture content in the soil is
-
24.2% -
18.2% -
53.8% -
none of these.
The angle between the directions of the failure and the major principal plane, is equal to
-
90° + effective angle of shearing resistance -
90° + half of the angle of shearing resistance -
45° - half of the angle of shearing resistance -
45° + half of the angle of shearing resistance.
If the specific gravity and voids in soil sample are G and e respectively, the hydraulic gradient i, is
For shear strength, triaxial shear test is suitable because
-
it can be performed under all three drainage conditions -
precise measurement of the pore pressure and volume change during the test is possible -
stress distribution on the failure plane, is uniform -
state of stress within the specimen during any stage of the test as well as at failure, is completely determined -
all the above.
The plasticity index is the numerical difference between
-
liquid limit and plastic limit -
plastic limit and shrinkage limit -
liquid limit and shrinkage limit -
none of these.
Depending upon the properties of a material, the failure envelope may
-
be either straight or curved -
pass through the origin of stress -
intersect the shear stress axis -
all the above.
Through a point in a loaded soil, the principal stress is maximum on
-
minor principal plane -
intermediate principal plane -
major principal plane -
none of these.
Maximum size of clay particles, is :
-
0.002 mm -
0.04 mm -
0.06 mm -
0.08 mm -
1 mm
According to IS :-the composition of a dispersing solution used in pipette analysis for determining the size of particles, is
-
sodium-hexametaphosphate 33 g, sodium carbonate 7 g and distilled water one litre -
sodium-hexametaphosphate 7 g, sodium carbonate 33 g and distilled water one litre -
sodium-hexametaphosphate 23 g, sodium carbonate 17 g and distilled water one litre -
none of these.
The capillary rise of water
-
depends upon the force responsible -
increases as the size of the soil particles increases -
decreases as the size of the soil particles decreases -
is less in wet soil than in dry soil.
The zero atmospheric pressure is at
-
sea level -
mean sea level -
water table -
phreatic surface -
both (c) and (d) of the above.
If drainage is permitted throughout the test, during the application of both normal, and shear stresses so that full consolidation occurs and no excess pore pressure is set up at any stage of the test, is known as
-
quick test -
drained test -
consolidated undrained test -
none of these.