# Geotechnical Engineering Test II

30 Questions | Total Attempts: 96

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• 1.
Which of the following is a measure of particle size range ?
• A.

Effective size

• B.

None of the above

• C.

Coefficient of curvature

• D.

Uniformity coefficient

• 2.
Which of the following statements is correct?
• A.

Uniformity coefficient represents the shape of the particle size distribution curve.

• B.

For a well graded soil, both uniformity coefficient and coefficient of curvature are nearly unity.

• C.

A soil is said to be well graded if it has most of the particles of about the same size

• D.

None of the above

• 3.
Uniformity coefficient of a soil is
• A.

always less than 1

• B.

always equal to 1

• C.

equal to or less than 1

• D.

Equal to or greater than 1

• 4.
According to Atterberg, the soil is said to be of medium plasticity if the plasticity index PI is
• A.

0 < PI < 7

• B.

7<PI<17

• C.

17<PI<27

• D.

PI>27

• 5.
If the natural water content of soil mass lies between its liquid limit and plastic limit, the soil mass is said to be in
• A.

liquid state

• B.

plastic state

• C.

semi-solid state

• D.

Solid state

• 6.
When the plastic limit of a soil is greater than the liquid limit, then the plasticity index is reported as
• A.

Negative

• B.

Zero

• C.

Non-plastic

• D.

1

• 7.
Toughness index is defined as the ratio of
• A.

plasticity index to consistency index

• B.

plasticity index to flow index

• C.

liquidity index to flow index

• D.

Consistency index to liquidity index

• 8.
If the plasticity index of a soil mass is zero, the soil is
• A.

Sand

• B.

Salt

• C.

Clay

• D.

Clayey silt

• 9.
The admixture of coarser particles like sand or silt to clay causes
• A.

decrease in liquid limit and increase in plasticity index

• B.

decrease in liquid limit and no change in plasticity index

• C.

decrease in both liquid limit and plasticity index

• D.

Increase in both liquid limit and plasticity index

• 10.
Select the correct statement.
• A.

A uniform soil has more strength and stability than a non-uniform soil

• B.

A uniform soil has less strength and stability than a non-uniform soil.

• C.

Uniformity coefficient does not affect strength and stability

• D.

Uniformity coefficient of a poorly graded soil is more than that of a well graded soil.

• 11.
The water content of soil, which represents the boundary between plastic state and liquid state, is known as
• A.

Liquid limit

• B.

Plastic limit

• C.

Shrinkage limit

• D.

Plasticity limit

• 12.
Which of the following soils has more plasticity index ?
• A.

Sand

• B.

Silt

• C.

Clay

• D.

Gravel

• 13.
At liquid limit, all soils possess
• A.

same shear strength of small magnitude

• B.

same shear strength of large magnitude

• C.

different shear strengths of small magnitude

• D.

Different shear strengths of large magnitude

• 14.
If the material of the base of the Casagrande liquid limit device on which the cup containing soil paste drops is softer than the standard hard rubber, then
• A.

the liquid limit of soil always increases

• B.

the liquid limit of soil always decreases

• C.

the liquid limit of soil may increase

• D.

The liquid limit of soil may decrease

• 15.
According to IS classification, the range of silt size particles is
• A.

4.75 mm to 2.00 mm

• B.

2.00 mm to 0.425 mm

• C.

0.425 mm to 0.075 mm

• D.

0.075 mm to 0.002 mm

• 16.
Highway Research Board (HRB) classification of soils is based on
• A.

particle size composition

• B.

plasticity characteristics

• C.

both particle size composition and plasticity characteristics

• D.

None of the above

• 17.
Inorganic soils with low compressibility are represented by
• A.

MH

• B.

SL

• C.

ML

• D.

CH

• 18.
Sand particles are made of
• A.

rock minerals

• B.

kaolinite

• C.

illite

• D.

Montmorillonite

• 19.
The clay mineral with the largest swelling and shrinkage characteristics is
• A.

kaolinite

• B.

illite

• C.

montmorillonite

• D.

None of the above

• 20.
Unified soil classification system (USCS) was developed by ____________
• A.

Kozney

• B.

Atterberg

• C.

Casagrande

• D.

Rankine

• 21.
According to USCS, the fined grained soil are classified on the basis of _____________
• A.

Plasticity

• B.

Grain size distribution

• C.

Group index

• D.

Particle size composition

• 22.
Fine grained soil are sub divided in to __________
• A.

Silt and clay

• B.

Sand and clay

• C.

Organic and silt

• D.

Gravel and peat

• 23.
In Casagrande’s plasticity chart, the numbers in the chart denotes ___________
• A.

Relative suitability

• B.

Grade of the soil

• C.

Division of the group

• D.

None of the mentioned

• 24.
According to IS classification, the symbol GC means __________
• A.

Clayey gravel

• B.

Silt gravel

• C.

Sand gravel

• D.

• 25.
The A-line, in unified classification system table has the equation of _________
• A.

IP=WL-20

• B.

IP=0.73(WL-20)

• C.

IP=0.73(20-wL)

• D.

IP=20-WL