soil and foundation

Question 1

If the failure of a finite slope occurs through the toe, it is known as

[A]. slope failure
[B]. face failure
[C]. base failure
[D]. toe failure. @

Answer 1

Depth factor.
More than 1 = base failure.
Equal 1 = toe failure.
Less than 1 = face failure.

Question 2

If S, L and R are the arc length, long chord and radius of the sliding circle then the perpendicular distance of the line of the resultant cohesive force, is given by

[A]. S.R /L @
[B].
[C].
[D]. none of these.

Answer 2

According to friction circle method.

a = r x La/Lc where la is the length of arc and lc is the length of chord and a>r.

Question 3

Pick up the correct statement from the following:

[A]. Sandy clayloam contains highest percentage of sand
[B]. Silty clayloam contains highest percentage of silt @
[C]. Stiff boulder clay offers maximum shear strength
[D]. Soft chalk carries least safe load
[E]. All the above.

Answer 3

Sandy clay loam: 20 to 35 per cent clay, less than 28 per cent silt, and 45 per cent or more sand.

Silty clay loam: 27 to 40 per cent clay and less than 20 per cent sand.

Question 4

The fluid generally used for grouting is

[A].	cement and water mix
[B].	clay suspension
[C].	sodium silicate
[D].	bitumen emulsion
[E].	all the above.	@

Answer 4

The fluid generally used for grouting is

[A].	cement and water mix
[B].	clay suspension
[C].	sodium silicate
[D].	bitumen emulsion
[E].	all the above.	@

Question 5

Failure of the stability of slopes, generally occurs along

[A]. slip plane
[B]. a horizontal surface
[C]. a curved surface @
[D]. all the surfaces.

Answer 5

Failure of the stability of slopes, generally occurs along

[A]. slip plane
[B]. a horizontal surface
[C]. a curved surface @
[D]. all the surfaces.

Question 6

Geologic cycle for the formation of soil, is

[A]. Upheavel → transportation → deposition → weathering
[B]. Weathering → upheaval → transportation → deposition
[C]. Transportation → upheaval → weathering → deposition
[D]. Weathering → transportation → deposition → upheaval @
[E]. None of these.

Answer 6

Geologic cycle for the formation of soil, is

[A]. Upheavel → transportation → deposition → weathering
[B]. Weathering → upheaval → transportation → deposition
[C]. Transportation → upheaval → weathering → deposition
[D]. Weathering → transportation → deposition → upheaval @
[E]. None of these.

Question 7

Which one of the following statements is true ?

[A]. Clays are more porous than sands
[B]. Pressure of organic matter in a soil decreases the bearing capacity of the soil
[C]. Aluminous cement is used for foundations in soils with chemical deposits
[D]. All the above. @

Answer 7

1. The main advantage is that it can withstand high temperatures so that it can be used in refractories, foundries and other workshops where high temperatures are involved.
2. The initial setting time is 3 hours than compared to that of PPC cement. And the final setting time of cement is 5 hours.
3. High Alumina Cement evolves great heat when setting so that these cements can be used in colder temperatures.
4. It is highly resistants to even concentrated acids and thereby it is widely used in chemical industries.
5. It sets fast and it attains a strength of 40 N/mm2 in just one day and 50 N/mm2 in three days.

Question 8

The internal molecular attraction of a soil, the cohesion

[A]. decreases as the moisture content increases
[B]. increases as the moisture content decreases
[C]. is more in well compacted clays @
[D]. depends upon the external applied load.

Answer 8

If we increase the water content in soil then up to a certain point cohesion increase but after increasing more and water moisture content, soil ultimately losses all its cohesive property as well as its shear strength.

So, the answer is C.

Question 9

The minimum water content at which the soil retains its liquid state and also possesses a small shearing strength against flowing, is known

[A]. liquid limit @
[B]. plastic limit
[C]. shrinkage limit
[D]. permeability limit.

Answer 9

The minimum water content at which the soil retains its liquid state and also possesses a small shearing strength against flowing, is known

[A]. liquid limit @
[B]. plastic limit
[C]. shrinkage limit
[D]. permeability limit.

Question 10

Determination of water content of a soil sample suspected to contain gypsum is made by drying the sample for longer period at a temperature not more than

[A]. 60°C
[B]. 80°C @
[C]. 100°C
[D]. 110°C

Answer 10

Certain soils contain gypsum which on heating loses its water if crystallization. If it is suspected that gypsum is present in the soil sample used for moisture content determination it shall be dried at not more than 80 ‘C and possibly for a longer time.

Question 11

Number of piles required to support a column, is

[A]. 1
[B]. 2
[C]. 3 @
[D]. 4

Answer 11

Number of piles required to support a column, is

[A]. 1
[B]. 2
[C]. 3 @
[D]. 4

Question 12

The soil moisture driven off by heat, is called

[A]. free water
[B]. hydroscopic water @
[C]. gravity water
[D]. none of these.

Answer 12

The soil moisture driven off by heat, is called

[A]. free water
[B]. hydroscopic water @
[C]. gravity water
[D]. none of these.

Question 13

If the specific gravity of a soil particle of 0.05 cm diameter is 2.67, its terminal velocity while settling in distilled water of viscosity, 0.01 poise, is

[A].	0.2200 cm/sec
[B].	0.2225 cm/sec
[C].	0.2250 cm/sec
[D].	0.2275 cm/sec	@
[E].	0.2300 cm/sec

Answer 13

Settling velocity = (g/18)(ρs - ρw)(d^2/μ).
= (9.81/18) * (2.67-1) * (((0.05x10^-2)^2)/(0.01x10^-4),
= 0.2275 cm/sec.

Question 14

The equation τ = C + σ tan φ is given by

[A]. Rankine
[B]. Coulomb @
[C]. Culaman
[D]. Mohr.

Answer 14

It is Coulomb because Mohr gave eq S=f(σ)
which was later developed by Coulomb as s=c+sigma tan φ
So this theory is generally referred as mohr coloumbs theory.

Question 15

You are given a sample of soil containing coarse grains to determine its water content, you will use

[A]. pycnometer @
[B]. oven-drying method
[C]. calcium carbide method
[D]. alcohol method.

Answer 15

Pycnometer method is more suitable for coarsely grained soil rather than fine grained. Because entrapped air in soil mass can be easily removed in case of coarse grained soil.

Question 16

The maximum shear stress occurs on the filament which makes an angle with the horizontal plane equal to

[A]. 30°
[B]. 45° @
[C]. 60°
[D]. 90°

Answer 16

The maximum shear stress occurs on the filament which makes an angle with the horizontal plane equal to

[A]. 30°
[B]. 45° @
[C]. 60°
[D]. 90°

Question 17

Pick up the in-correct statement from the following: The soils which contain montmorillonite minerals

[A].	swell more when wet
[B].	shrink more when dry
[C].	possess high plasticity
[D].	possess high coefficient of internal coefficient	@
[E].	None of these.

Answer 17

Pick up the in-correct statement from the following: The soils which contain montmorillonite minerals

[A].	swell more when wet
[B].	shrink more when dry
[C].	possess high plasticity
[D].	possess high coefficient of internal coefficient	@
[E].	None of these.

Question 18

Pick up the correct statement from the following:

[A]. Kaolinite is most stable clay
[B]. Kaolinite shows a very little sign of swelling on wetting
[C]. Kaolinite when wet, becomes moderately plastic because negative electro magnetic charges on platelets attrack water
[D]. Kaolinite is also called China clay
[E]. All the above. @

Answer 18

Pick up the correct statement from the following:

[A]. Kaolinite is most stable clay
[B]. Kaolinite shows a very little sign of swelling on wetting
[C]. Kaolinite when wet, becomes moderately plastic because negative electro magnetic charges on platelets attrack water
[D]. Kaolinite is also called China clay
[E]. All the above. @

Question 19

Water content of a soil sample is the difference of the weight of the given sample at the given temperature and the weight determined after drying it for 24 hours at temperature ranging from

[A].	80° to 90°C
[B].	90° to 95°C
[C].	95° to 100°C
[D].	103° to 105°C
[E].	105° to 110°C	@

Answer 19

Water content of a soil sample is the difference of the weight of the given sample at the given temperature and the weight determined after drying it for 24 hours at temperature ranging from

[A].	80° to 90°C
[B].	90° to 95°C
[C].	95° to 100°C
[D].	103° to 105°C
[E].	105° to 110°C	@

Question 20

The angle of internal friction of clays, is usually

[A]. 0° to 5°
[B]. 5° to 20° @
[C]. 20° to 30°
[D]. 30° to 45°

Answer 20

Approximate maximum value of the angle of internal friction.
Rock- 30°.
Clay 20°.
Silt 34°.
Sand 30° to 40°.
Gravel 35°.

Question 21

Pick up the correct statement from the following:

[A]. In hydrometer method, weight Wd per ml of suspension is found directly
[B]. In pipette analysis, weight Wd per ml of suspension is found indirectly
[C]. In pipette analysis, weight Wd per ml of suspension is found directly @
[D]. None of these.

Answer 21

Pick up the correct statement from the following:

[A]. In hydrometer method, weight Wd per ml of suspension is found directly
[B]. In pipette analysis, weight Wd per ml of suspension is found indirectly
[C]. In pipette analysis, weight Wd per ml of suspension is found directly @
[D]. None of these.

Question 22

Pick up the correct statement from the following:

[A]. In hydrometer method, weight Wd per ml of suspension is found directly @
[B]. In pipette analysis, weight Wd per ml of suspension is found indirectly
[C]. In pipette analysis, weight Wd per ml of suspension is found directly @
[D]. None of these.

Answer 22

Pick up the correct statement from the following:

[A]. In hydrometer method, weight Wd per ml of suspension is found directly @
[B]. In pipette analysis, weight Wd per ml of suspension is found indirectly
[C]. In pipette analysis, weight Wd per ml of suspension is found directly @
[D]. None of these.

Question 23

For general engineering purposes, soils are classified by

[A]. particle size classification system
[B]. textural classification system
[C]. High Way Research Board (HRB), classification system
[D]. unified soil classification system. @

Answer 23

For general engineering purposes, soils are classified by

[A]. particle size classification system
[B]. textural classification system
[C]. High Way Research Board (HRB), classification system
[D]. unified soil classification system. @

Question 24

If there is no impervious boundary at the bottom of a hydraulic structure, stream lines tend to follow :

[A]. a straight line
[B]. a parabola
[C]. a semi-ellipse @
[D]. a semi-circle.

Answer 24

If there is no impervious boundary at the bottom of a hydraulic structure, stream lines tend to follow :

[A]. a straight line
[B]. a parabola
[C]. a semi-ellipse @
[D]. a semi-circle.

Question 25

For determining the ultimate bearing capacity of soil, the recommended size of a square bearing plate to be used in load plate test should be 30 to 75 cm square with a minimum thickness of

[A].	5 mm
[B].	10 mm
[C].	15 mm
[D].	20 mm
[E].	25 mm	@

Answer 25

For determining the ultimate bearing capacity of soil, the recommended size of a square bearing plate to be used in load plate test should be 30 to 75 cm square with a minimum thickness of

[A].	5 mm
[B].	10 mm
[C].	15 mm
[D].	20 mm
[E].	25 mm	@