5814 + Mcqs in Civil Engineering Page 97 McqOptions

4801.	The property of a soil which permits water to percolate through it, is called
A.	moisture content
B.	permeability
C.	capillarity
D.	none of these.
Answer» C. capillarity

Discussion

4802.	The triaxial apparatus is usually used for
A.	unconsolidated-undrained test
B.	consolidated-undrained test
C.	drained test
D.	all the above tests.
Answer» E.

Discussion

4803.	A clay subjected to pressure in excess to its present over-burden, is said to be
A.	pre-compressed
B.	pre-consolidated
C.	over-consolidated
D.	all the above.
Answer» E.

Discussion

4804.	The expression is used for
A.	dry density
B.	bulk density
C.	degree of saturation
D.	optimum water content.
Answer» B. bulk density

Discussion

4805.	If Cv is the coefficient of consolidation, t is the time and d is drainage path of one dimensional consolidation of soil, the time factor Tv, is given by
A.	<img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/42-11-172-1.png">
B.	<img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/42-11-172-2.png">
C.	<img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/42-11-172-3.png">
D.	<img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/42-11-172-4.png">
Answer» E.

Discussion

4806.	If e0, e, ', 0' have their usual meanings, the coefficient of compressibility (ac), is given by
A.	<img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/41-11-167-1.png">
B.	<img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/41-11-167-2.png">
C.	<img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/41-11-167-3.png">
D.	<img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/41-11-167-4.png">
Answer» C. <img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/41-11-167-3.png">

Discussion

4807.	A saturated soil sample has water content of 40% and specific gravity of soil particles 2.7. The void ratio of the soil, is
A.	0.4
B.	0.52
C.	1.08
D.	none of these.
Answer» D. none of these.

Discussion

4808.	For testing a saturated clay for shear strength, the test recommended, is
A.	direct shear test
B.	triaxial compression test
C.	unconfined compression test
D.	all the above.
Answer» D. all the above.

Discussion

4809.	The critical exist gradient of seepage water in soils, increases with
A.	an increase in specific gravity
B.	a decrease in specific gravity
C.	a decrease in void ratio
D.	both (a) and (c)
E.	none of these.
Answer» E. none of these.

Discussion

4810.	The coefficient ka of the active earth pressure, is given by
A.	<img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/38-11-129-1.png">
B.	<img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/38-11-129-2.png">
C.	<img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/38-11-129-3u.png">
D.	<img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/38-11-129-4u.png">
Answer» E.

Discussion

4811.	The reduction in volume of soil due to squeezing out of water from the voids, is termed
A.	primary consolidation
B.	primary compression
C.	primary time effect
D.	all the above.
Answer» E.

Discussion

4812.	'Drift' is the material picked up, mixed, disintegrated, transported and redeposited by
A.	wind
B.	gravitational force
C.	glaciated water
D.	all the above.
Answer» D. all the above.

Discussion

4813.	The consistency index of a soil is defined as the ratio of
A.	liquid limit plus the natural water content to the plasticity index of the soil
B.	liquid limit minus the natural water content to the plasticity index of the soil
C.	natural water content of a soil minus plastic limit to the plasticity index of the soil
D.	natural water content of a soil plus its plastic limit to the plasticity index of the soil.
Answer» C. natural water content of a soil minus plastic limit to the plasticity index of the soil

Discussion

4814.	The weight of a container is W1 and that of container with soil simple, is W2. If the weight of the container and oven dried soil sample is W3, the moisture content of the soil, is
A.	<img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/44-11-206-1.png">
B.	<img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/44-11-206-2.png">
C.	<img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/44-11-206-3.png">
D.	<img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/44-11-206-4.png">
Answer» B. <img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/44-11-206-2.png">

Discussion

4815.	The shear strength in plastic undrained clay, is due to
A.	inter-granular friction
B.	internal friction
C.	cohesion
D.	none of these.
Answer» D. none of these.

Discussion

4816.	Stoke's law does not hold good if the size of particle is smaller than
A.	0.0002 mm
B.	0.002 mm
C.	0.02 mm
D.	0.2 mm
Answer» B. 0.002 mm

Discussion

4817.	In a purely cohesive soil, the critical centre lies at the intersection of
A.	perpendicular bisector of slope and the locus of the centre
B.	perpendicular drawn at l/3rd slope from toe and the locus of the centre
C.	perpendicular drawn at 2/3rd slope from toe and the locus of the centre
D.	directional angles
E.	none of these.
Answer» E. none of these.

Discussion

4818.	The angle of internal friction, is least for
A.	angular-grained loose sand
B.	angular -grained dense sand
C.	round-grained loose sand
D.	round-grained loose sand
E.	clays.
Answer» F.

Discussion

4819.	In active state of plastic equilibrium in a non cohesive soil with horizontal ground surface
A.	major principal stress is horizontal
B.	minor principal stress is vertical
C.	major principal stress is vertical
D.	minor and major principal stresses are equally inclined to horizontal.
Answer» D. minor and major principal stresses are equally inclined to horizontal.

Discussion

4820.	The minimum depth of building foundations on
A.	sandy soils is 80 cm to 100 cm
B.	clay soils is 90 cm to 160 cm
C.	rocky soils is 5 cm to 50 cm
D.	all the above.
Answer» E.

Discussion

4821.	The ratio of the undrained strength in the undrained state to the undrained strength, at the same water content, in the remoulded state, is called the sensivity of the clay. Its value for quick clays is
A.	4
B.	8
C.	12
D.	16
E.	20
Answer» F.

Discussion

4822.	If drainage is permitted throughout the test, during the application of both normal, and shear stresses so that full consolidation occurs and no excess pore pressure is set up at any stage of the test, is known as
A.	quick test
B.	drained test
C.	consolidated undrained test
D.	none of these.
Answer» C. consolidated undrained test

Discussion

4823.	The consolidation time for soils
A.	increases with increasing compressibility
B.	decreases with increasing permeability
C.	increases rapidly with increasing size of soil mass
D.	is independent of the magnitude of the stress change.
E.	All the above.
Answer» F.

Discussion

4824.	The specific gravity of Calcite is
A.	2.65
B.	2.72
C.	2.85
D.	2.90
Answer» C. 2.85

Discussion

4825.	The total weight of a pycnometer with water and oven dried soil 20 (g) is 1600 g. The pycnometer filled with water alone weighs 1500 g. The specific gravity of the soil, is
A.	1.0
B.	1.5
C.	2.0
D.	2.5
Answer» D. 2.5

Discussion

4826.	The ratio of volume of air voids to the volume of total voids, is known as
A.	air content
B.	percentage air voids
C.	percentage voids
D.	porosity.
Answer» B. percentage air voids

Discussion

4827.	Hydrometer readings are corrected for:
A.	temperature correction
B.	meniscus correction
C.	dispersing agent correction
D.	meniscus and dispersing agent corrections
E.	temperature, meniscus and dispersing agent corrections.
Answer» F.

Discussion

4828.	A plane inclined at an angle to the horizontal at which the soil is expected to stay in the absence of any lateral support, is known as
A.	natural slope line
B.	repose line
C.	the line
D.	all the above.
Answer» E.

Discussion

4829.	Tergazhi's theory of one dimensional consolidation assumes
A.	load is applied in one direction
B.	coefficient of permeability is constant
C.	excess pore water drains out only in the vertical direction
D.	time lag in consolidation is due entirely to permeability
E.	all the above.
Answer» F.

Discussion

4830.	The Mohr's straight theory is based on the following fact :
A.	Material fails essentially by shear
B.	Ultimate strength of the material is determined by the stress in the plane of slip
C.	Failure criterion is independent of the intermediate principal stress
D.	All the above.
Answer» E.

Discussion

4831.	An unsaturated 100 cm3 sample of soil weighs 190 g. If its dried weight is 160 g, water content of the soil, is
A.	0.188
B.	0.288
C.	0.388
D.	0.488
E.	0.588
Answer» B. 0.288

Discussion

4832.	According to IS : 2720 - 1965, the composition of a dispersing solution used in pipette analysis for determining the size of particles, is
A.	sodium-hexametaphosphate 33 g, sodium carbonate 7 g and distilled water one litre
B.	sodium-hexametaphosphate 7 g, sodium carbonate 33 g and distilled water one litre
C.	sodium-hexametaphosphate 23 g, sodium carbonate 17 g and distilled water one litre
D.	none of these.
Answer» B. sodium-hexametaphosphate 7 g, sodium carbonate 33 g and distilled water one litre

Discussion

4833.	Chemical weathering of soil is caused due to
A.	oxidation
B.	carbonation
C.	hydration
D.	leaching
E.	all the above.
Answer» F.

Discussion

4834.	Cohesive soils are generally
A.	plastic and also compressible
B.	elastic and also compressible
C.	plastic but incompressible
D.	none of these.
Answer» B. elastic and also compressible

Discussion

4835.	'Talus' is the soil transported by
A.	wind
B.	water
C.	glacier
D.	gravitational force.
Answer» E.

Discussion

4836.	A triaxial shear test is prefered to direct shear test, because
A.	it can be performed under all three driange conditions with complete control
B.	precise measurement of pore pressure and change in volume during test, is not posible
C.	stress distribution on the failure plane, is non uniform
D.	none of these.
Answer» B. precise measurement of pore pressure and change in volume during test, is not posible

Discussion

4837.	If the coefficient of the active pressure Ka is 1/3, the coefficient of passive pressure Kp, is
A.	1/3
B.	2/3
C.	1
D.	3/2
E.	3
Answer» F.

Discussion

4838.	The inventor of the term soil mechanics, was
A.	Kray
B.	Dr. Karl Terzaghi
C.	Leygue
D.	Fellenius.
Answer» C. Leygue

Discussion

4839.	Compression of soil occurs rapidly if voids are filled with
A.	air
B.	water
C.	partly with air and partly with water
D.	none of these.
Answer» B. water

Discussion

4840.	If is the surcharge angle of a backfill with an angle of internal friction , the coefficient of active earth pressure given by Rankine's theory, is :
A.	<img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/39-11-134-1.png">
B.	<img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/39-11-134-2.png">
C.	<img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/39-11-134-3.png">
D.	none of these.
Answer» C. <img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/39-11-134-3.png">

Discussion

4841.	A structure is erected on an impervious clay whose thickness is 12 m. Drainage is possible both at upper and lower surfaces. Coefficient of consolidation is 0.015 cm2 per minute. For attaining 50% consolidation with a time factor 0.20, the number of days required
A.	3233
B.	3123
C.	33331
D.	3313
Answer» D. 3313

Discussion

4842.	A soil sample of mass specific gravity 1.92, has a moisture content 30%. If the specific gravity of solids is 2.75, the degree of saturation, is
A.	95.4%
B.	95.5%
C.	95.6%
D.	95.7%
Answer» E.

Discussion

4843.	A soil mass is said to be in plastic equilibrium if
A.	it is stressed to maximum
B.	it is on the verge of failure
C.	it is in plastic stage
D.	it starts flowing.
Answer» C. it is in plastic stage

Discussion

4844.	For slopes of limited extent the surface of slippage, is usually along
A.	a parabolic arc
B.	an elliptical arc
C.	a straight line
D.	a circular arc.
Answer» E.

Discussion

4845.	A critical hydraulic gradient may occur when
A.	flow is in upward direction
B.	seepage pressure is in upward direction
C.	effective pressure is zero
D.	all the above.
Answer» E.

Discussion

4846.	The ratio of emax and emin of silty sand, is
A.	2.0
B.	5
C.	3.0
D.	3.5
E.	4.0
Answer» D. 3.5

Discussion

4847.	A flow net may be utilised for the determination of
A.	exit gradient
B.	seepage
C.	hydrostatic pressure
D.	seepage pressure
E.	all the above.
Answer» F.

Discussion

4848.	The neutral stress in a soil mass is
A.	force per neutral area
B.	force per effective area
C.	stess taken up by the pore water
D.	stress taken up by solid particles.
Answer» D. stress taken up by solid particles.

Discussion

4849.	Laplacian fundamental equation for a non-compressible flow in three dimensions, is
A.	<img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/35-11.82-1.png">
B.	<img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/35-11.82-2.png">
C.	<img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/35-11.82-3.png">
D.	none of these.
Answer» D. none of these.

Discussion

4850.	The bearing capacity of a soil depends upon
A.	size of the particles
B.	shape of the particles
C.	cohesive properties of particles
D.	internal frictional resistance of particles
E.	all the above.
Answer» F.

Discussion

Explore topic-wise MCQs in Engineering.

The property of a soil which permits water to percolate through it, is called

The triaxial apparatus is usually used for

A clay subjected to pressure in excess to its present over-burden, is said to be

The expression is used for

If Cv is the coefficient of consolidation, t is the time and d is drainage path of one dimensional consolidation of soil, the time factor Tv, is given by

If e0, e, ', 0' have their usual meanings, the coefficient of compressibility (ac), is given by

A saturated soil sample has water content of 40% and specific gravity of soil particles 2.7. The void ratio of the soil, is

For testing a saturated clay for shear strength, the test recommended, is

The critical exist gradient of seepage water in soils, increases with

The coefficient ka of the active earth pressure, is given by

The reduction in volume of soil due to squeezing out of water from the voids, is termed

'Drift' is the material picked up, mixed, disintegrated, transported and redeposited by

The consistency index of a soil is defined as the ratio of

The weight of a container is W1 and that of container with soil simple, is W2. If the weight of the container and oven dried soil sample is W3, the moisture content of the soil, is

The shear strength in plastic undrained clay, is due to

Stoke's law does not hold good if the size of particle is smaller than

In a purely cohesive soil, the critical centre lies at the intersection of

The angle of internal friction, is least for

In active state of plastic equilibrium in a non cohesive soil with horizontal ground surface

The minimum depth of building foundations on

The ratio of the undrained strength in the undrained state to the undrained strength, at the same water content, in the remoulded state, is called the sensivity of the clay. Its value for quick clays is

If drainage is permitted throughout the test, during the application of both normal, and shear stresses so that full consolidation occurs and no excess pore pressure is set up at any stage of the test, is known as

The consolidation time for soils

The specific gravity of Calcite is

The total weight of a pycnometer with water and oven dried soil 20 (g) is 1600 g. The pycnometer filled with water alone weighs 1500 g. The specific gravity of the soil, is

The ratio of volume of air voids to the volume of total voids, is known as

Hydrometer readings are corrected for:

A plane inclined at an angle to the horizontal at which the soil is expected to stay in the absence of any lateral support, is known as

Tergazhi's theory of one dimensional consolidation assumes

The Mohr's straight theory is based on the following fact :

An unsaturated 100 cm3 sample of soil weighs 190 g. If its dried weight is 160 g, water content of the soil, is

According to IS : 2720 - 1965, the composition of a dispersing solution used in pipette analysis for determining the size of particles, is

Chemical weathering of soil is caused due to

Cohesive soils are generally

'Talus' is the soil transported by

A triaxial shear test is prefered to direct shear test, because

If the coefficient of the active pressure Ka is 1/3, the coefficient of passive pressure Kp, is

The inventor of the term soil mechanics, was

Compression of soil occurs rapidly if voids are filled with

If is the surcharge angle of a backfill with an angle of internal friction , the coefficient of active earth pressure given by Rankine's theory, is :

A structure is erected on an impervious clay whose thickness is 12 m. Drainage is possible both at upper and lower surfaces. Coefficient of consolidation is 0.015 cm2 per minute. For attaining 50% consolidation with a time factor 0.20, the number of days required

A soil sample of mass specific gravity 1.92, has a moisture content 30%. If the specific gravity of solids is 2.75, the degree of saturation, is

A soil mass is said to be in plastic equilibrium if

For slopes of limited extent the surface of slippage, is usually along

A critical hydraulic gradient may occur when

The ratio of emax and emin of silty sand, is

A flow net may be utilised for the determination of

The neutral stress in a soil mass is

Laplacian fundamental equation for a non-compressible flow in three dimensions, is

The bearing capacity of a soil depends upon