R4RIN – MCQs, Mock Tests | Civil Engineering Soil Mechanics

The soil often found in areas of poor drainage with high evaporation is

1. Alkaline
2. Clay
3. Kaoline
4. Peaty

✅ Correct Answer: 1

Plastic limit of a soil is defined as

1. The water content at which the soil shows shearing resistance as the water content is reduced.
2. The limit of water content that represents the boundary between plastic and semi-solid state.
3. The lowest water content at which soil can still be completely saturated.
4. None of the above

✅ Correct Answer: 1

The property of soil which permits the seepage of water is known as

1. Permeability
2. Porosity
3. Capillarity
4. Viscocity

✅ Correct Answer: 2

In the process of lime stabilization of clay

1. Strength increases
2. Clay particles get flocculated into large size
3. Shrinkage limit increases
4. All the above

✅ Correct Answer: 4

The powdered rock which includes all kinds of disintegrated rock is known as

1. Alluvial soil
2. Shale
3. Murram
4. Red soil

✅ Correct Answer: 2

Specific gravity of a substance is the ratio of its mass in air to the mass of equal volume of water at

1. 0°C
2. 4°C
3. 27°C
4. 35°C

✅ Correct Answer: 2

Hydrometers are normally calibrated at

1. 0°C
2. 20°C
3. 35°C
4. 40°C

✅ Correct Answer: 3

The moisture content of a clayey soil is gradually reduced from a large value. The correct sequence of the occurrence of the limit are

1. Plastic limit, liquid limit and shrinkage limit
2. Liquid limit, plastic limit and shrinkage limit
3. Plastic limit, shrinkage limit and liquid limit
4. Shrinkage limit, plastic limit and liquid limit

✅ Correct Answer: 4

A soil is said to be of medium size, if the uniformity coefficient is

1. Less than 5
2. Between 0 and 5
3. Between 5 and 10
4. Between 10 – 15

✅ Correct Answer: 3

Which one of the following is not a correct statement about alluvial soil?

1. It is formed due to sediment transported by streams and rivers
2. They contain mainly iron and magnesium
3. They are loamy soils
4. It is darker in colour

✅ Correct Answer: 2

Density of soil in SI units is expressed as

1. N/m2
2. N/m3
3. kg/m2
4. kg/m3

✅ Correct Answer: 3

Particle size of sand is between

1. 0.002 to 0.075 mm
2. 0.002 to 2.0 mm
3. 0.075 to 2.0 mm
4. 0.0075 to 4.75 mm

✅ Correct Answer: 3

A soil is said to be well graded if coefficient of curvature lies between

1. 1 and 3
2. 1 and 5
3. 3 and 5
4. 5 and 7

✅ Correct Answer: 3

In the densest state void ratio of soil can be low as

1. 0.2
2. 0.3
3. 0.15
4. 0.25

✅ Correct Answer: 4

Darcy's law is based on the assumption that

1. Soil is homogeneous and isotropic
2. Soil is saturated
3. There is laminar flow condition
4. All the above

✅ Correct Answer: 1

Quick sand is

1. A sand which act as a quick filter
2. A uniformly graded sand
3. The conditions focusing quick flow of water through the soil
4. A condition when cohesionless soil loses its shear strength due to upward flow water

✅ Correct Answer: 4

The soil particles of size below _____ are considered fine grained.

1. 2.0 mm
2. 0.002 mm
3. 0.075 mm
4. 0.0475 mm

✅ Correct Answer: 1

Stoke's law is applicable to soil particles of size between

1. 0.2 mm to 0.2 m
2. 0.2 mm to 2 m
3. 0.3 mm to 0.2 m
4. 0.3 mm to 3 m

✅ Correct Answer: 2

By compaction void ratio of uniform sized spherical particles can be reduced upto

1. 0.15
2. 0.25
3. 0.35
4. 0.45

✅ Correct Answer: 4

The ratio of voids to total volume of soil mass is called

1. water content ratio
2. degree of saturation
3. porosity
4. void ratio

✅ Correct Answer: 1

During electrical stabilization of soil

1. fine grained soil is drained
2. friction between particles increase
3. soil particles get flocculated to form large particles
4. All of the above

✅ Correct Answer: 1

A pycnometer is used to determines

1. water content and voids ratio
2. water content and specific gravity
3. voids ratio and dry density
4. specific gravity and dry density

✅ Correct Answer: 2

Cohesive soils are

1. poor for back-fill because of large lateral pressure
2. good for back-fill because of low lateral pressure
3. good for back-fill because of high shear strength
4. none of the above

✅ Correct Answer: 1

Which one of the following is not a factor influencing coefficient permeability.

1. hydraulic gradient
2. degree of saturation
3. viscocity of water
4. size and shape of particle

✅ Correct Answer: 1

Size of gravel is between

1. 2.0 to 20 mm
2. 4.75 to 80 mm
3. 0.475 to 4.75 mm
4. 0.475 to 2.0 mm

✅ Correct Answer: 1

Void ratio is the ratio of volume of voids to

1. unit weight of soil
2. total volume of soil
3. volume of solids
4. none of the above

✅ Correct Answer: 3

To remove organic matter from the soil sample to be used in sedimentation analysis, it is mixed with hydrogen peroxide at

1. 20°C
2. 27°C
3. 60°C
4. 80°C

✅ Correct Answer: 2

Difference between liquid limit and plastic limit is known as

1. lquidity index
2. consistency index
3. plasticity index
4. none of the above

✅ Correct Answer: 2

The piping failure in a hydraulic structure can be prevented by

1. diverting the seepage water into filter wells
2. increasing the stress due to weight of the structure
3. increasing the creep length of flows of water
4. All of the above

✅ Correct Answer: 4

Ultimate bearing capacity of soil is the

1. maximum gross pressure at which soil fails in shear
2. maximum net pressure at which soul fails in shear
3. maximum pressure at which soil settles beyond the specified limit
4. both a and c

✅ Correct Answer: 1

A fully saturated soil is said to be

1. one phase system
2. two phase system with soil and water
3. two phase system with soil and air
4. three phase systemv

✅ Correct Answer: 2

The hydrostatic pressure on the phreatic line within a dam section is

1. equal to atmospheric pressure
2. greater than atmospheric pressure
3. less than atmospheric pressure
4. none of these

✅ Correct Answer: 1

Lime stabilization is very effective in treating

1. silty soils
2. plastic clayed soils
3. sandy soils
4. non plastic soilsv

✅ Correct Answer: 2

In engineering, soil is defined as

1. natural aggregates of mineral grains loose or moderately cohesive, inorganic or organic in nature
2. the top surface of the earth which is good for growth of plant
3. a disintegrated rock
4. All of the above

✅ Correct Answer: 1

Aeoline deposit is a soil transport by

1. streams
2. glaciers
3. wind
4. gravity

✅ Correct Answer: 3

Water content can be

1. zero to 100%
2. zero to 200%
3. zero to 300%
4. zero to 400%

✅ Correct Answer: 1

Which of the following is highly permeable?

1. coarse sand
2. clay
3. gravel
4. fine sand

✅ Correct Answer: 1

In a plate load test minimum size of plate to be used is

1. 100 mm x 100 mm
2. 250 mm x 250 mm
3. 300 mm x 300 mm
4. 400 mm x 400 mm

✅ Correct Answer: 3

Residual soils are formed by

1. water
2. glaciers
3. wind
4. none of the above

✅ Correct Answer: 4

The term soil Mechanics was coined by

1. Newmark
2. Terzaghi
3. newton
4. Rankine

✅ Correct Answer: 2

Limitation of Stoke's law

1. all particles should have same specific gravity
2. it cannot be applied to particles of size smaller than 0.2 m
3. it is true for spherical particles only
4. All of the above

✅ Correct Answer: 3

Plastic limit is defined as

1. the water content at which the soil shows shearing resistance as the water content is reduced
2. the lowest water content at which soil can still be completely saturated
3. the limit of water content that represents the boundary between plastic and semi-solid state
4. none of the above

✅ Correct Answer: 1

Which of the following types of soil is transported by gravitational forces?

1. loess
2. drift
3. dune sand
4. talus

✅ Correct Answer: 4

Rise of water table above the ground surface causes

1. increase in pore water pressure but decrease in total stress
2. decrease in pore water pressure but increase in total stress
3. equal decrease in pore water pressure and total stress
4. equal increase in pore water pressure and total stress

✅ Correct Answer: 4

The ratio of volume of voids to the total volume of soil mass is called

1. porosity
2. percentage air voids
3. voids ratio
4. air content

✅ Correct Answer: 1

Coarse grained soils are best compacted by a

1. vibratory roller
2. sheep's foot roller
3. rubber tyred roller
4. drum roller

✅ Correct Answer: 1

The value of factor of safety adopted in foundation design is

1. 1.2 to 1.5
2. 1.5 to 2.0
3. 2 to 3
4. 3 to 4

✅ Correct Answer: 3

Coulomb's earth pressure theory gives the same value as Rankine's theory when

1. wall is smooth and vertical
2. wall is vertical
3. wall is smooth
4. none of the above

✅ Correct Answer: 1

The soil particles coarser than _____ can be examined by means of hand lense

1. 0.15 mm
2. 0.75 mm
3. 0.015 mm
4. 0.075 mm

✅ Correct Answer: 4

Quick sand is a

1. flow condition occurring in both cohesive and cohesionless soils
2. flow conditions occurring in cohesionless soils
3. flow condition occurring in cohesive soils
4. type of sand

✅ Correct Answer: 2

Mechanical stabilization of soil is done with the help of

1. proper grading
2. bitumen
3. lime
4. cement

✅ Correct Answer: 2

When a soil sample is subjected to purely hydrostatic pressure s the Mohr's circle is

1. a circle of radius s at the origin
2. circle of radius s at distance s from the origin
3. a point at distance s from the origin
4. none of the above

✅ Correct Answer: 3

Shrinkage limit is defined as

1. the water content at which the soil shows shearing resistance as the water content is reduced
2. the limit of water content that represents the boundary between plastic and semi-solid state
3. the lowest water content at which soil can still be completely saturated
4. none of the above

✅ Correct Answer: 2

Alluvial deposits is the soil transported by

1. streams and rivers
2. glaciers
3. wind
4. gravity

✅ Correct Answer: 1