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MCQ
28001. Which of the following is practically impermeable? [BREB-15]
Gravel
Sand mixture
Coarse sand
Clay
28002. Standard Penetration Test (SPT) tube length- [MES-16]
6"
18"
12"
24"
ব্যাখ্যা: The test uses a thick walled sample tube, with an outside diameter of 50.8 mm or 2" and inside diameter of 35 mm or 1.8 and a length of arround 650 mm or 26"
28003. Soils are derived from..............rocks.
igneous
metamorphic
sedimentary
any one of these
28004. When water content in a soil is reduced beyond the shrinkage limit, the soil will be in a- [BREB-15]
solid state
semi-solid state
liquid state
plastic state
28005. The soil transported by wind is called-
aeolian soil
alluvial soil
marine soil
lacustrine soil
28006. The effective size of a soil is-[MES-16]
D10
D20
D40
D60
ব্যাখ্যা: D10 is called as effective particle size. This means that 10% percent of the particles are finer and 90% of the particles are coarser than D10 This is the size at 10% finer by weight
28007. The ratio of the unit weight of soil solids to that of water is called-
void ratio
porosity
specific gravity
degree of saturation
28008. IF SPT of clayey soil is 2 then the soil is - [MES-16]
Soft
Hard
Medium
Stiff
ব্যাখ্যা: Very soft < 2; Soft 2-4: Medium=4-8 Stiff8-15; Very stiff = 15-30; Hard => 30
28009. Residual soils are-
sands
silts
clays
all of these
28010. The maximum size of grains of silts is about-
0.06mm
0.5mm
0.2mm
1mm
28011. The bearing capacity of soil can be improved by-[BREB-15]
increasing the depth of footing
draining the sub-soil water
ramming the granular material like crushed stone in the soil
all of the above
ব্যাখ্যা: The following techniques can be used for improving bearing capacity of soil as per the site condition. (1) Increasing depth of foundation (i) Draining the soil (iii) Compacting the soil (iv) Confining the soil (v) Replacing the poor soil (vi) Using grouting material (vii) Stabilizing the soil with chemicals.
28012. Chemical weathering of soil is caused due to-
oxidation
hydration
carbonation & leaching
all of these
28013. The minimum size of grains of silts is about-
0.0002mm
0.02mm
0.002mm
0.2mm
28014. ১৭৫। The property of the soil mass which permits the seepage of water through its interconnecting voids, called- [BREB-15]
capillarity
porosity
permeability
none of these
ব্যাখ্যা: The property of the soil by which permits the flow of fluid through it is called permeability of the soil permeability can be defined as the a bility of a porous mass to allow passage of water through the medium.
28015. When a cohesionless soil attains quick condition, it looses- [HED-19]
Shear strength
Bearing capacity
Both a and b
Neither a and b
ব্যাখ্যা: Cohesionless soilds are defined as any free running type of soil such as sand, Gravel and stone. Cohesionless soil attains quick condition then it lose it's shear strengh and bearing capacity.
28016. The soil transportated by running water is called-
aeolian soil
alluvial soil
marine soil
lacustrine soil
28017. Capillary rise will be greater in [BGFCL-17]
gravel
fine sand
silt
coarse
ব্যাখ্যা: Clay soil has the highest capillarity, followed by loam and then sandy soil.
28018. Void ratio (e) is-. [MES-16]
Vv/V
Vv/Vs
Vs/V
V/Vs
28019. Which of the following soil is transported by wind?
Talus
Drift
Loess
all of these
28020. The property of a soil which is of great importance in finding settlement of structures. is- [BREB-15]
permeability
shear strength
consolidation
compressibility
ব্যাখ্যা: Consolidation is a natural process where soil below the building and other structure compacted by the transferred load to the soil through the provided foundation system.