A clayey soil has a maximum dry density fo 16 kN/m3 and optimum moisture content of 12%. A contractor during the construction of core of an earth dam obtained the dry density 15.2 kN/m3 and water content 11%. This construction is acceptable because.

the density is less than the maximum dry density and water content is on dry side of optimum.

the compaction density is very low and water content is less than 12%.

the compaction is done on the dry side of the optimum.

both the dry density and water content of the compacted soil are within the desirable limits.

The ratio Nf/Nd is known as shape factor, where Nf is the number of flow lines and Nd is the number of equipotential drops. Flow net is always drawn with a constant b/a ratio, where b and a are distances between two consecutive flow lines and equipotential lines, respectively. Assuming that b/a ratio remains the same, the shape factor of a flow net will change if the

head difference causing the flow is changed

upstream and downstream heads are interchanged

soil in the flow space is changed

dimensions of the flow space are changed

head difference causing the flow is changed

110 + Mcqs in Soil mechanics miscellaneous in Soil Mechanics Page 1 McqOptions

1.	The following two statements are made with respect to different sand samples having the same relative density. Identify if they are TRUE or FALSE. I. Poorly graded sands will have lower friction angle than the well graded sands. II. The particle size has no influence on the friction angle of sand.
A.	II is TRUE but I is FALSE.
B.	Both are FALSE statements
C.	Both are TRUE statements
D.	I is TRUE but II is FALSE.
Answer» E.

Discussion

2.	A clayey soil has a maximum dry density fo 16 kN/m³ and optimum moisture content of 12%. A contractor during the construction of core of an earth dam obtained the dry density 15.2 kN/m³ and water content 11%. This construction is acceptable because.
A.	the density is less than the maximum dry density and water content is on dry side of optimum.
B.	the compaction density is very low and water content is less than 12%.
C.	the compaction is done on the dry side of the optimum.
D.	both the dry density and water content of the compacted soil are within the desirable limits.
Answer» E.

Discussion

3.	The ratio N_f/N_d is known as shape factor, where N_f is the number of flow lines and N_d is the number of equipotential drops. Flow net is always drawn with a constant b/a ratio, where b and a are distances between two consecutive flow lines and equipotential lines, respectively. Assuming that b/a ratio remains the same, the shape factor of a flow net will change if the
A.	upstream and downstream heads are interchanged
B.	soil in the flow space is changed
C.	dimensions of the flow space are changed
D.	head difference causing the flow is changed
Answer» D. head difference causing the flow is changed

Discussion

4.	Two series of compaction tests were performed in the laboratory on an inorganic clayey soil employing two different levels of compaction energy per unit volume of soil. With regard to the above tests, the following two statements are made. I. The optimum moisture content is expected to be more for the tests with higher energy. II. The maximum dry density is expected to be more for the tests with higher energy. The CORRECT option evaluating the above statement is
A.	Only I is TRUE
B.	Only II is TRUE
C.	Both I and II are TRUE
D.	Neither I nor II is TRUE
Answer» C. Both I and II are TRUE

Discussion

5.	Identify the two FALSE statements from the following four statements. I. The consolidation of soil happens due to the change in total stress. II. When Standard Penetration Tests are performed in fine sands below the water table, the dilation correction is applied after the overburden correction is applied. III. Over consolidated clay's will have predominantly cohesive strength as compared to the frictional strength. IV. Compaction of soils is due to expulsion of water.
A.	II & III
B.	I & IV
C.	I & III
D.	II & IV
Answer» C. I & III

Discussion

6.	A borrow pit soil has a dry density of 17 kN/m³. How many cubic meters of this soil will be required to construct an embankment of 100 m³ volume with a dry density of 16 kN/ m³
A.	94 m
B.	106 m
C.	100 m
D.	90 m
Answer» B. 106 m

Discussion

7.	An infinite slope is to be constructed in a soil. The effective stress strength parameters of the soil are c = 0 and = 30 . The saturated unit weight of the slope is 20kN/m³ and the unit weight of water is 10kN m³. Assuming that seepage is occurring parallel to the slope, the maximum slope angle for a factor of safety of 1.5 would be
A.	10.89
B.	11.30
C.	12.48
D.	14.73
Answer» B. 11.30

Discussion

8.	A deep cut of 7 m has to be made in a clay with unit weight 16 kN/m³ and a cohesion of 25 kN/m². What will be the factor of safety if one has to have a slope angle of 30 ? Stability number is given to be 0.178 (from Taylor s chart) for a depth factor of 3.
A.	0.80
B.	1.1
C.	1.25
D.	1.0
Answer» D. 1.0

Discussion

9.	In a drained triaxial compression test, a saturated specimen of a cohesion less sand fails under a deviatoric stress of 3 kg/cm² when the cell pressure is 1 kgf/cm². The effective angle of shearing resistance of sand is about
A.	37
B.	45
C.	53
D.	20
Answer» B. 45

Discussion

10.	A braced cut, 5 m wide and 7.5 m deep is proposed in a cohesion less soil deposit having effective cohesion c = 0 and effective friction angle, = 36 . The first row of struts is to be installed a depth of 0.5 m below ground surface and spacing between the struts should be 1.5 m. If the horizontal spacing of struts is 3 m and unit weight of the deposit is 20kN/m³, the maximum strut load will be
A.	70.87 kN
B.	98.72 kN
C.	113.90 kN
D.	151.86 kN
Answer» D. 151.86 kN

Discussion

11.	A unit volume of a mass of saturated soil is subjected to horizontal seepage. The saturated unit weight is 22 kN/m³ and the hydraulic gradient is 0.3. The resultant body force on the soil mass is
A.	1.98 kN
B.	6.6 kN
C.	11.49 kN
D.	22.97 kN
Answer» E.

Discussion

12.	The undrained cohesion of a remoulded clay soil is 10 kN/m². If the sensitivity of the clay is 20, the corresponding remoulded compressive strength is
A.	5 kN/m
B.	10 kN/m
C.	20 kN/m
D.	200 kN/m
Answer» D. 200 kN/m

Discussion

13.	In a constant head permeameter with cross section of 10 cm², when the flow was taking place under a hydraulic gradient of 0.5, the amount of water collected in 60 seconds is 600 cc. The permeability of the soil is
A.	0.002 cm/s
B.	0.02 cm/s
C.	0.2 cm/s
D.	2.0 cm/s
Answer» E.

Discussion

14.	In its natural condition a soil sample has a mass of 1.980 kg and a volume of 0.001 m³. After being completely dried in an oven, the mass of sample is 1.800 kg. Specific gravity is 2.7. Unit wt of water is 10 kN/m³. Degree of saturation of soil is.
A.	0.65
B.	0.7
C.	0.54
D.	0.61
Answer» D. 0.61

Discussion

15.	A given cohesion less soil has emax = 0.85 and emin = 0.50. In the field, the soil is compacted to a mass density of 1800 kg/ m³ at a water content of 8%. Take the mass density of water as 1000 kg/m³ and Gs as 2.7. The relative density (in%) of the soil is
A.	56.43
B.	60.25
C.	62.87
D.	65.71
Answer» E.

Discussion

16.	In its natural condition, a soil sample has a mass of 1.980 kg and a volume of 0.001 m³. After being completely dried in an oven, the mass of the sample is 1.800 kg. Specific gravity G is 2.7. Unit weight of water is 10 kN/m^{3 0.65 0.70 0.54 0.61}
A.	0.65
B.	0.70
C.	0.54
D.	0.61
Answer» D. 0.61

Discussion

17.	An infinitely long slope is made up of a c- soil having the properties: cohesion (c) = 20 kPa, and dry unit weight ( _d) = 16 kN/m³. The angle of inclination and critical height of the slope are 40 and 5 m, respectively. To maintain the limiting equilibrium, the angle of internal friction of the soil (in degrees) is __________________
A.	21 to 23
B.	31 to 33
C.	41 to 43
D.	11 to 13
Answer» B. 31 to 33

Discussion

18.	A direct shear test was conducted on a cohesion-less soil (c = 0) specimen under a normal stress of 200 kN/m². The specimen failed at a shear stress of 100 kN/m². The angle of internal friction of the soil (degrees) is
A.	26.6
B.	29.5
C.	30.0
D.	32.6
Answer» C. 30.0

Discussion

19.	A certain soil has the following properties: G_s = 2.71, n = 40% and w = 20%. The degree of saturation of the soil (rounded off to the nearest percent) is ________
A.	80.3%
B.	80%
C.	81.3%
D.	82%
Answer» D. 82%

Discussion

20.	The following data are given for the laboratory sample. _o' = 175 kPa; e_o = 1.1; _o' + _o' = 300 kPa; e = 0.9 If thickness of the clay specimen is 25 mm, the value of coefficient of volume comprehensibility is __________ 10⁴ m² /kN.
A.	7.3 m
B.	4.6 m
C.	5.8 m
D.	6.3 m
Answer» E.

Discussion

21.	Stress path equation for tri-axial test upon application of deviatoric stress is, q = 10 3 + 0.5 p. The respective values of cohesion, c (in kPa) and angle of internal friction, are:
A.	20 and 20
B.	20 and 30
C.	30 and 30
D.	30 and 20
Answer» C. 30 and 30

Discussion

22.	What is the change in the effective stress in kN/m² at mid-depth of the clay due to the lowering of the water table?
A.	0
B.	20
C.	80
D.	100
Answer» E.

Discussion

23.	A non-homogeneous soil deposit consists of a silt layer sandwiched between a fine-sand layer at top and a clay layer below. Permeability of the silt layer is 10 times the permeability of the clay layer and one-tenth of the permeability of the sand layer. Thickness of the silt layer is 2 Times the thickness of the sand layer and two-third of the thickness of the clay layer. The ratio of equivalent horizontal and equivalent vertical permeability of the deposit is ________.
A.	11.0254
B.	10.9675
C.	10.0056
D.	9.6542
Answer» C. 10.0056

Discussion

24.	A 588 cm³ volume of moist sand weighs 1010 gm. Its dry weight is 918 gm and specific gravity of solids, G is 2.67. Assuming density of water as 1 gm/cm³, the void ratio is ______
A.	0.21
B.	0.51
C.	0.71
D.	0.91
Answer» D. 0.91

Discussion

25.	A 4 m thick layer of normally consolidated clay has an average void ratio of 1.30. Its compression index is 0.6 and coefficient of consolidation is 1 m² /yr. If the increase in vertical pressure due to foundation load on the clay layer is equal to the existing effective overburden pressure, the change in the thickness of the clay layer is_______mm
A.	316 mm
B.	315 mm
C.	314 mm
D.	312 mm
Answer» D. 312 mm

Discussion

26.	The water content of a saturated soil and the specific gravity of soil solids were found to be 30% and 2.70, respectively, Assuming the unit weight of water to be 10 kN/m³, the saturated unit weight (kN/m³) and the void ratio of the soil are
A.	19.4, 0.81
B.	18.5, 0.30
C.	19.4, 0.45
D.	18.5,0.45
Answer» B. 18.5, 0.30

Discussion

27.	An open ended steel barrel of 1 m height and 1 m diameter is filled with saturated fine sand having coefficient of permeability of 10² m/s. The barrel stands on a saturated bed of gravel. The time required for the water level in the barrel to drop by 0.75 m is
A.	58.9 s
B.	75 s
C.	100 s
D.	150 s
Answer» C. 100 s

Discussion

28.	For a triaxial shear test conducted on a sand specimen at a confining pressure of 100 kN/m² under drained condition,s resulted in a deviator stress (s₁ s₃) at failutre of 100 kN/m². The angle of shearing resistance of the solid would be
A.	18.43
B.	19.47
C.	26.56
D.	30
Answer» C. 26.56

Discussion

29.	The laboratory test results of a soil sample are given below: Percentage finer than 4.75 mm = 60 Percentage finer than 0.075 mm = 30 Liquid Limit = 35% Plastic Limit = 27% The soil classification is
A.	GM
B.	SM
C.	GC
D.	ML-MI
Answer» C. GC

Discussion

30.

Thej following data were obtained from a liquid limit test conducted on a soil sample
Number of blows 17 22 25 28 34
Water content (%) 63.8 63.1 61.9 60.6 60.5

The liquid limit of the soil is

A.

63.1%

B.

62.8%

C.

61.9%

D.

60.6%

Answer» D. 60.6%

Discussion

31.	What is the compression of the clay layer in mm due to the lowering of the water table?
A.	125
B.	100
C.	25
D.	0
Answer» B. 100

Discussion

32.	What would be the change in the effective stress (rounded off to the nearest integer value of kPa) at 30 m depth into the sand layer if the sea water level permanently rises by 2 m?
A.	19 kPA
B.	0 kPa
C.	21 kPa
D.	22 kPa
Answer» C. 21 kPa

Discussion

33.	What are discharge velocity and seepage velocity through the soil sample?
A.	k, 2k
B.	2/3k, 4/3k
C.	2k, k
D.	4/3k, 2/3k
Answer» B. 2/3k, 4/3k

Discussion

34.	A sample saturated cohesion less soil tested in a drained triaxial compression test showed an angle of internal friction of 30 . The deviatoric stress at failure for the sample at a confining pressure of 200 kPa is equal to
A.	2000 kPa
B.	400 kPa
C.	600 Kpa
D.	800 kPa
Answer» C. 600 Kpa

Discussion

35.	A direct shear test was conducted on a cohesion-less soil (c = 0) specimen under a normal stress of 200 kN/m
A.	26.6
B.	29.5
C.	30.0
D.	32.6
Answer» C. 30.0

Discussion

36.	A fine-grained soil has 60% (by weight) silt content. The soil behaves as semi-solid when water content is between 15% and 28%. The soil behaves fluid-like when the water content is more than 40%. The Activity of the soil is
A.	3.33
B.	0.42
C.	0.30
D.	0.20
Answer» D. 0.20

Discussion

37.	In an unconsolidated undrained triaxial test, it is observed that an increase in cell pressure from 150 kPa to 250 kPa leads to a pore pressure increase of 80 kPa. It is further observed that, an increase of 50 kPa in deviatoric stress results in an increase of 25 kPa in the pore pressure. The value of Skemptons s pore pressure parameter B is:
A.	0.5
B.	0.625
C.	0.8
D.	1.0
Answer» D. 1.0

Discussion

38.	A given cohesion less soil has emax = 0.85 and emin = 0.50. In the field, the soil is compacted to a mass density of 1800 kg/ m
A.	56.43
B.	60.25
C.	62.87
D.	65.71
Answer» E.

Discussion

39.	The per cent voids in mineral aggregate (VMA) and per cent air voids (Vv) in a compacted cylindrical bituminous mix specimen are 15 and 4.5 respectively. The per cent voids filled with bitumen (VFB) for this specimen is
A.	24
B.	30
C.	54
D.	70
Answer» D. 70

Discussion

40.	The total head, elevation head and pressure head in metres of water at the point R shown in the figure
A.	0.8, 0.4, 0.4
B.	1.2, 0.4, 0.8
C.	0.4, 0, 0.4
D.	1.6, 0.4, 1.2
Answer» D. 1.6, 0.4, 1.2

Discussion

41.	The classification of the soil is
A.	SP
B.	SW
C.	GP
D.	GW
Answer» C. GP

Discussion

42.	A layer of normally consolidated, saturated silty clay of 1 m thickness is subjected to one dimensional consolidation under a pressure increment of 20 kPa. The properties of the soil are: specific gravity = 2.7, natural moisture content = 45%, compression index = 0.45, and recompression index = 0.05. The initial average effective stress within the layer is 100 kPa. Assuming Terzaghi s theory to be applicable, the primary consolidation settlement (rounded off to the nearest mm) is
A.	2 mm
B.	9 mm
C.	14 mm
D.	16 mm
Answer» E.

Discussion

43.	In its natural condition, a soil sample has a mass of 1.980 kg and a volume of 0.001 m
A.	0.65
B.	0.70
C.	0.54
D.	0.61
Answer» D. 0.61

Discussion

44.	The following data are given for the laboratory sample.
A.	7.3 m
B.	4.6 m
C.	5.8 m
D.	6.3 m
Answer» E.

Discussion

45.	The total consolidation settlement of the clay layer due to the construction of a structure imposing an additional stress intensity of 200 kPa is
A.	0.10 m
B.	0.25 m
C.	0.35 m
D.	0.50 m
Answer» E.

Discussion

46.	The coefficient of uniformity of the soil is
A.	0.9
B.	1.0
C.	1.1
D.	1.2
Answer» E.

Discussion

47.	A certain soil has the following properties: G
A.	80.3%
B.	80%
C.	81.3%
D.	82%
Answer» D. 82%

Discussion

48.	The effective stress friction angle of a saturated, cohesion less soil is 38 . The ratio of shear stress to normal effective stress on the failure plane is
A.	0.781
B.	0.616
C.	0.488
D.	0.438
Answer» B. 0.616

Discussion

49.	For a sample of dry, cohesionless soil with friction angle, f, the failure plane will be inclined to the major principal plane by an angle equal to
A.
B.	45
C.	45 /2
D.	45 + /2
Answer» E.

Discussion

50.	Stress path equation for tri-axial test upon application of deviatoric stress is, q = 10
A.	20 and 20
B.	20 and 30
C.	30 and 30
D.	30 and 20
Answer» C. 30 and 30

Discussion

Explore topic-wise MCQs in Soil Mechanics.

The following two statements are made with respect to different sand samples having the same relative density. Identify if they are TRUE or FALSE. I. Poorly graded sands will have lower friction angle than the well graded sands. II. The particle size has no influence on the friction angle of sand.

A clayey soil has a maximum dry density fo 16 kN/m3 and optimum moisture content of 12%. A contractor during the construction of core of an earth dam obtained the dry density 15.2 kN/m3 and water content 11%. This construction is acceptable because.

A borrow pit soil has a dry density of 17 kN/m3. How many cubic meters of this soil will be required to construct an embankment of 100 m3 volume with a dry density of 16 kN/ m3

A deep cut of 7 m has to be made in a clay with unit weight 16 kN/m3 and a cohesion of 25 kN/m2. What will be the factor of safety if one has to have a slope angle of 30 ? Stability number is given to be 0.178 (from Taylor s chart) for a depth factor of 3.

In a drained triaxial compression test, a saturated specimen of a cohesion less sand fails under a deviatoric stress of 3 kg/cm2 when the cell pressure is 1 kgf/cm2. The effective angle of shearing resistance of sand is about

A unit volume of a mass of saturated soil is subjected to horizontal seepage. The saturated unit weight is 22 kN/m3 and the hydraulic gradient is 0.3. The resultant body force on the soil mass is

The undrained cohesion of a remoulded clay soil is 10 kN/m2. If the sensitivity of the clay is 20, the corresponding remoulded compressive strength is

In a constant head permeameter with cross section of 10 cm2, when the flow was taking place under a hydraulic gradient of 0.5, the amount of water collected in 60 seconds is 600 cc. The permeability of the soil is

In its natural condition a soil sample has a mass of 1.980 kg and a volume of 0.001 m3. After being completely dried in an oven, the mass of sample is 1.800 kg. Specific gravity is 2.7. Unit wt of water is 10 kN/m3. Degree of saturation of soil is.

A given cohesion less soil has emax = 0.85 and emin = 0.50. In the field, the soil is compacted to a mass density of 1800 kg/ m3 at a water content of 8%. Take the mass density of water as 1000 kg/m3 and Gs as 2.7. The relative density (in%) of the soil is

In its natural condition, a soil sample has a mass of 1.980 kg and a volume of 0.001 m3. After being completely dried in an oven, the mass of the sample is 1.800 kg. Specific gravity G is 2.7. Unit weight of water is 10 kN/m3 0.65 0.70 0.54 0.61

A direct shear test was conducted on a cohesion-less soil (c = 0) specimen under a normal stress of 200 kN/m2. The specimen failed at a shear stress of 100 kN/m2. The angle of internal friction of the soil (degrees) is

A certain soil has the following properties: Gs = 2.71, n = 40% and w = 20%. The degree of saturation of the soil (rounded off to the nearest percent) is ________

The following data are given for the laboratory sample. o' = 175 kPa; eo = 1.1; o' + o' = 300 kPa; e = 0.9 If thickness of the clay specimen is 25 mm, the value of coefficient of volume comprehensibility is __________ 10 4 m2 /kN.

Stress path equation for tri-axial test upon application of deviatoric stress is, q = 10 3 + 0.5 p. The respective values of cohesion, c (in kPa) and angle of internal friction, are:

What is the change in the effective stress in kN/m2 at mid-depth of the clay due to the lowering of the water table?

A 588 cm3 volume of moist sand weighs 1010 gm. Its dry weight is 918 gm and specific gravity of solids, G is 2.67. Assuming density of water as 1 gm/cm3, the void ratio is ______

The water content of a saturated soil and the specific gravity of soil solids were found to be 30% and 2.70, respectively, Assuming the unit weight of water to be 10 kN/m3, the saturated unit weight (kN/m3) and the void ratio of the soil are

An open ended steel barrel of 1 m height and 1 m diameter is filled with saturated fine sand having coefficient of permeability of 10 2 m/s. The barrel stands on a saturated bed of gravel. The time required for the water level in the barrel to drop by 0.75 m is

For a triaxial shear test conducted on a sand specimen at a confining pressure of 100 kN/m2 under drained condition,s resulted in a deviator stress (s1 s3) at failutre of 100 kN/m2. The angle of shearing resistance of the solid would be

The laboratory test results of a soil sample are given below: Percentage finer than 4.75 mm = 60 Percentage finer than 0.075 mm = 30 Liquid Limit = 35% Plastic Limit = 27% The soil classification is

Thej following data were obtained from a liquid limit test conducted on a soil sample Number of blows1722252834Water content (%)63.863.161.960.660.5The liquid limit of the soil is

What is the compression of the clay layer in mm due to the lowering of the water table?

What would be the change in the effective stress (rounded off to the nearest integer value of kPa) at 30 m depth into the sand layer if the sea water level permanently rises by 2 m?

What are discharge velocity and seepage velocity through the soil sample?

A sample saturated cohesion less soil tested in a drained triaxial compression test showed an angle of internal friction of 30 . The deviatoric stress at failure for the sample at a confining pressure of 200 kPa is equal to

A direct shear test was conducted on a cohesion-less soil (c = 0) specimen under a normal stress of 200 kN/m

A fine-grained soil has 60% (by weight) silt content. The soil behaves as semi-solid when water content is between 15% and 28%. The soil behaves fluid-like when the water content is more than 40%. The Activity of the soil is

A given cohesion less soil has emax = 0.85 and emin = 0.50. In the field, the soil is compacted to a mass density of 1800 kg/ m

The per cent voids in mineral aggregate (VMA) and per cent air voids (Vv) in a compacted cylindrical bituminous mix specimen are 15 and 4.5 respectively. The per cent voids filled with bitumen (VFB) for this specimen is

The total head, elevation head and pressure head in metres of water at the point R shown in the figure

The classification of the soil is

In its natural condition, a soil sample has a mass of 1.980 kg and a volume of 0.001 m

The following data are given for the laboratory sample.

The total consolidation settlement of the clay layer due to the construction of a structure imposing an additional stress intensity of 200 kPa is

The coefficient of uniformity of the soil is

A certain soil has the following properties: G

The effective stress friction angle of a saturated, cohesion less soil is 38 . The ratio of shear stress to normal effective stress on the failure plane is

For a sample of dry, cohesionless soil with friction angle, f, the failure plane will be inclined to the major principal plane by an angle equal to

Stress path equation for tri-axial test upon application of deviatoric stress is, q = 10

The following two statements are made with respect to different sand samples having the same relative density. Identify if they are TRUE or FALSE.
I. Poorly graded sands will have lower friction angle than the well graded sands.
II. The particle size has no influence on the friction angle of sand.

A clayey soil has a maximum dry density fo 16 kN/m³ and optimum moisture content of 12%. A contractor during the construction of core of an earth dam obtained the dry density 15.2 kN/m³ and water content 11%. This construction is acceptable because.

A borrow pit soil has a dry density of 17 kN/m³. How many cubic meters of this soil will be required to construct an embankment of 100 m³ volume with a dry density of 16 kN/ m³

A deep cut of 7 m has to be made in a clay with unit weight 16 kN/m³ and a cohesion of 25 kN/m². What will be the factor of safety if one has to have a slope angle of 30 ? Stability number is given to be 0.178 (from Taylor s chart) for a depth factor of 3.

In a drained triaxial compression test, a saturated specimen of a cohesion less sand fails under a deviatoric stress of 3 kg/cm² when the cell pressure is 1 kgf/cm². The effective angle of shearing resistance of sand is about

A unit volume of a mass of saturated soil is subjected to horizontal seepage. The saturated unit weight is 22 kN/m³ and the hydraulic gradient is 0.3. The resultant body force on the soil mass is

The undrained cohesion of a remoulded clay soil is 10 kN/m². If the sensitivity of the clay is 20, the corresponding remoulded compressive strength is

In a constant head permeameter with cross section of 10 cm², when the flow was taking place under a hydraulic gradient of 0.5, the amount of water collected in 60 seconds is 600 cc. The permeability of the soil is

In its natural condition a soil sample has a mass of 1.980 kg and a volume of 0.001 m³. After being completely dried in an oven, the mass of sample is 1.800 kg. Specific gravity is 2.7. Unit wt of water is 10 kN/m³. Degree of saturation of soil is.

A given cohesion less soil has emax = 0.85 and emin = 0.50. In the field, the soil is compacted to a mass density of 1800 kg/ m³ at a water content of 8%. Take the mass density of water as 1000 kg/m³ and Gs as 2.7. The relative density (in%) of the soil is

In its natural condition, a soil sample has a mass of 1.980 kg and a volume of 0.001 m³. After being completely dried in an oven, the mass of the sample is 1.800 kg. Specific gravity G is 2.7. Unit weight of water is 10 kN/m^{3 0.65
0.70
0.54
0.61}

A direct shear test was conducted on a cohesion-less soil (c = 0) specimen under a normal stress of 200 kN/m². The specimen failed at a shear stress of 100 kN/m². The angle of internal friction of the soil (degrees) is

A certain soil has the following properties: G_s = 2.71, n = 40% and w = 20%. The degree of saturation of the soil (rounded off to the nearest percent) is ________

The following data are given for the laboratory sample. _o' = 175 kPa; e_o = 1.1; _o' + _o' = 300 kPa; e = 0.9 If thickness of the clay specimen is 25 mm, the value of coefficient of volume comprehensibility is __________ 10⁴ m² /kN.

What is the change in the effective stress in kN/m² at mid-depth of the clay due to the lowering of the water table?

A 588 cm³ volume of moist sand weighs 1010 gm. Its dry weight is 918 gm and specific gravity of solids, G is 2.67. Assuming density of water as 1 gm/cm³, the void ratio is ______

The water content of a saturated soil and the specific gravity of soil solids were found to be 30% and 2.70, respectively, Assuming the unit weight of water to be 10 kN/m³, the saturated unit weight (kN/m³) and the void ratio of the soil are

An open ended steel barrel of 1 m height and 1 m diameter is filled with saturated fine sand having coefficient of permeability of 10² m/s. The barrel stands on a saturated bed of gravel. The time required for the water level in the barrel to drop by 0.75 m is

For a triaxial shear test conducted on a sand specimen at a confining pressure of 100 kN/m² under drained condition,s resulted in a deviator stress (s₁ s₃) at failutre of 100 kN/m². The angle of shearing resistance of the solid would be

The laboratory test results of a soil sample are given below:
Percentage finer than 4.75 mm = 60
Percentage finer than 0.075 mm = 30
Liquid Limit = 35%
Plastic Limit = 27%
The soil classification is

Thej following data were obtained from a liquid limit test conducted on a soil sample
Number of blows 17 22 25 28 34
Water content (%) 63.8 63.1 61.9 60.6 60.5

The liquid limit of the soil is