Online Civil Engineering Test - Soil Mechanics and Foundation Engineering Test

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Total number of questions: 20.
Time allotted: 30 minutes.
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Geologic cycle for the formation of soil, is

Upheavel → transportation → deposition → weathering

Weathering → upheaval → transportation → deposition

Transportation → upheaval → weathering → deposition

Weathering → transportation → deposition → upheaval

None of these.

[#]

Minimum size of the particles of silt soil, is

0.002 mm

0.04 mm

0.06 mm.

0.08 mm

1 mm

[#]

The liquidity index is defined as a ratio expressed as percentage of

plastic limit minus the natural water content, to its plasticity index

natural water content minus its plastic limit to its plasticity index

natural water content plus its plastic limit to its plasticity index

liquid limit minus the natural water content to the plasticity index.

[#]

Which one of the following statements is true ?

Clays are more porous than sands

Pressure of organic matter in a soil decreases the bearing capacity of the soil

Aluminous cement is used for foundations in soils with chemical deposits

All the above.

[#]

Back fill with a sloping surface exerts a total active pressure P_a on the wall of height H and acts at

H/4 above the base parallel to base

H/2 above the base parallel to base

H/3 above the base parallel to base

H/5 above the base parallel to base.

[#]

The lateral earth pressure on a retaining wall

is equal to mass of the soil retained

proportional to the depth of the soil

proportional to the square of the depth of the soil

proportional to the internal friction of the soil

none of these.

[#]

Pick up the correct statement from the following:

Sandy clayloam contains highest percentage of sand

Silty clayloam contains highest percentage of silt

Stiff boulder clay offers maximum shear strength

Soft chalk carries least safe load

All the above.

[#]

A phreatic line is defined as the line within a dam section below which there are

positive equipotential lines

positive hydrostatic pressure

negative hydrostatic pressure

negative equipotential lines

none of these.

[#]

For a homogeneous earth dam 50 m high having 2 m free broad, a flow net was constructed and the results were : Number of potential drops = 2.4 Number of flow channels = 0.4. If coefficiency of permeability of the dam mateiral is 3 x 10^-3 cm³/sec, the discharge per metre length of dam, is

12 x 10^-5 m³/sec

24 x 10^-3 m³/sec

6 x 10^-5 m³/sec

24 x 10^-5 m³/sec

[#]

10.

The maximum load carried by a pile, when it continues to sink without further increase of load, is known as

ultimate load carrying capacity

ultimate bearing capacity

ultimate bearing resistant

all the above.

[#]

11.

Transporting and redepositing soils, is done by

water

glacier

gravity

wind

all the above.

[#]

12.

Fine sand possesses

good plasticity

limited plasticity

reasonable plasticity

clay.

[#]

13.

The minimum centre to centre distance of friction piles of 1 m diameter, is

2 m

2 m to 3 m

3 m to 4 m

5 m

[#]

14.

Pick up the correct statement from the following:

O.M.C. refers to the moisture corresponding to the maximum point on the moisture content dry density curve

The line which shows moisture content dry density relation for soil containing a constant percentage of air voids, is known as air void line

The weight of hammer used for compaction test is 25 kg

The free fall of hammer for compaction is 30.5 cm

All the above.

[#]

15.

The total active earth pressure due to dry back fill with no surcharge, acts at H/3 above the base of the wall and is directly proportional to

H²

H³.

[#]

16.

Through a point in a loaded soil mass, there exists n typical planes mutually orthogonal on which the stress is wholly normal and no shear stress acts, if n is

[#]

17.

A soil not fully consolidated under the existing over-burden pressure, is called

pre-consolidated

normally consolidated

under-consolidated

none of these.

[#]

18.

Pick up the correct definition from the following:

The lateral pressure exerted by the soil when the retaining wall moves away from the back fill, is generally known as active earth pressure of the soil

The lateral pressure exerted by the soil when the retaining wail moves towards the soil, is generally known as 'Passive earth pressure of the soil'

The lateral pressure exerted by the soil when the retaining wall has no movement relative to the back fill, is known as 'earth pressure at rest of the soil'

All the above.

[#]

19.

The maximum pressure which a soil can carry without shear failure, is called

safe bearing capacity

net safe bearing capacity

net ultimate bearing capacity

ultimate bearing capacity.

[#]

20.

The bulk density of the soil sample stated in Q. No. 11.243, is

1.4 g/cc

1.6 g/cc

1.8 g/cc

2.0 g/cc

[#]

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