civil engineering Mcqs
3701. If the voids of a soil mass are full of air only, the soil is termed as_______________?
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A. air entrained soil

B. dry soil

C. partially saturated soil

D. dehydrated soil

3702. The slope of isochrone at any point at a given time indicates the rate of change of_______________?
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A. pore water pressure with depth

B. effective stress with depth

C. effective stress with time

D. pore water pressure with time

3703. If the shearing stress is zero on two planes, then the angle between the two planes is________________?
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A. 225

B. 135

C. 90

D. 45

3704. Quick sand is a________________?
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A. type of sand

B. flow condition occurring in cohesive soils

C. flow condition occurring in cohesionless soils

D. flow condition occurring in both cohesive and cohesionless soils

3705. Bishops method of stability analysis_______________?
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A. all of the above

B. neglects the effect of forces acting on the sides of the slices

C. assumes the slip surface as an arc of a circle

D. is more conservative

3706. Coefficient of permeability of soil______________?
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A. increases with the increase in temperature

B. does not depend upon temperature

C. increases with the decrease in temperature

D. none of the above

3707. Coefficient of earth pressure at rest is__________________?
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A. less than active earth pressure but greater than passive earth pressure

B. greater than active earth pressure but less than passive earth pressure

C. greater than both the active earth pressure and passive earth pressure

D. less than both the active and passive earth pressures

3708. Which of the following types of soil is transported by gravitational forces ?
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A. drift

B. dune sand

C. talus

D. loess

3709. If the permeability of a soil is 0.8 mm/sec, the type of soil is_______________?
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A. silt

B. clay

C. sand

D. gravel

3710. Which of the following soils has more plasticity index ?
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A. clay

B. gravel

C. sand

D. silt

3711. Sand particles are made of________________?
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A. illite

B. rock minerals

C. kaolinite

D. montmorillonite

3712. If the sand in-situ is in its densest state, then the relative density of sand is_____________?
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A. 1

B. greater than 1

C. zero

D. between 0 and 1

3713. Effective stress on soil_____________?
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A. increases voids ratio and decreases permeability

B. increases both voids ratio and permeability

C. decreases both voids ratio and permeability

D. decreases voids ratio and increases permeability

3714. Physical properties of a permeant which influence permeability are________________?
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A. viscosity only

B. unit weight only

C. both viscosity and unit weight

D. none of the above

3715. The rise of water table below the foundation influences the bearing capacity of soil mainly by reducing_______________?
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A. cohesion and effective angle of shearing resistance

B. cohesion and effective unit weight of soil

C. effective angle of shearing resistance

D. effective unit weight of soil and effective angle of shearing resistance

3716. According to Atterberg, the soil is said to be of medium plasticity if the plasticity index PI is____________?
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A. 0 < PI < 7

B. 17<PI27

C. 7
3717. When the degree of saturation is zero, the soil mass under consideration represents______________?
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A. two phase system with soil and air

B. three phase system

C. one phase system

D. two phase system with soil and water

3718. Sensitivity of a soil can be defined as___________________?
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A. none of the above

B. percentage of volume change of soil under saturated condition

C. ratio of compressive strength of unconfined undisturbed soil to that of soil in a remoulded state

D. ratio of volume of voids to volume of solids

3719. Coarse grained soils are best compacted by a_______________?
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A. sheeps foot roller

B. vibratory roller

C. rubber tyred roller

D. drum roller

3720. The major principal stress in an element of cohesionless soil within the backfill of a retaining wall is________________?
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A. vertical if the soil is in an active state of plastic equilibrium

B. vertical if the soil is in a passive state of plastic equilibrium

C. inclined at 45 to the vertical plane

D. none of the above

3721. The average coefficient of permeability of natural deposits________________?
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A. parallel to stratification is always greater than that perpendicular to stratification

B. parallel to stratification is always less than that perpendicular to stratification

C. is always same in both directions

D. parallel to stratification may or may not be greater than that perpendicular to stratification

3722. The coefficient of active earth pressure for a loose sand having an angle of internal friction of 30 is___________________?
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A. 1

B. 1/3

C. 3

D. 2-Jan

3723. Which one of the following clays behaves like a dense sand ?
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A. under-consolidated clay

B. normally consolidated clay

C. over-consolidated ciay with a high over-consolidation ratio

D. over-consolidated clay with a low over-consolidation ratio

3724. A retaining wall 6m high supports a backfill with a surcharge angle of 10. The back of the wall is inclined to the vertical at a positive batter angle of 5. If the angle of wall friction is 7, then the resultant active earth pressure will act at a distance of 2 m above the base and inclined to the horizontal at an angle of_________________?
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A. 7

B. 12

C. 10

D. 17

3725. When the plastic limit of a soil is greater than the liquid limit, then the plasticity index is reported as_____________?
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A. zero

B. non-plastic (NP)

C. negative

D. 1

3726. Total number of stress components at a point within a soil mass loaded at its boundary is______________?
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A. 16

B. 3

C. 6

D. 9
3727. Contact pressure beneath a rigid footing resting on cohesive soil is_________________?
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A. none of the above

B. less at edges compared to middle

C. more at edges compared to middle

D. uniform throughout

3728. A cylindrical specimen of saturated soil failed under an axial vertical stress of 100kN/m2 when it was laterally unconfmed. The failure plane was inclined to the horizontal plane at an angle of 45. The values of cohesion and angle of internal friction for the soil are respectively______________________?
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A. 0.05 N/mm2 and 0

B. 0.2 N/mm2 and 0

C. 0.5 N/mm2 and 30

D. 0.05 N/mm2 and 45

3729. Select the incorrect statement?
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A. Effective angle of internal friction for a soil increases as state of compact-ness increases

B. Effective cohesion of a soil can never have a negative value

C. Effective angle of internal friction for coarse grained soils is rarely below 30

D. Effective angle of internal friction is a complicated function of mineralogy and clay size content

3730. Skemptons pore pressure coefficient B for saturated soil is________________?
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A. 1

B. greater than 1

C. between 0 and 1

D. zero

3731. Toughness index is defined as the ratio of____________________?
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A. plasticity index to consistency index

B. plasticity index to flow index

C. liquidity index to flow index

D. consistency index to liquidity index

3732. The total and effective stresses at a depth of 5 m below the top level of water in a swimming pool are respectively__________________?
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A. 0.5 kg/cm2 and zero

B. 1.0 kg/cm2 and 0.5 kg/cm2

C. zero and zero

D. 0.5 kg/cm2 and 0.5 kg/cm2

3733. Water content of soil can______________?
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A. never be greater than 100 %

B. be greater than 100 %

C. be less than 0 %

D. take values only from 0 % to 100 %

3734. Select the correct statement?
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A. A uniform soil has less strength and stability than a non-uniform soil

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

C. Uniformity coefficient does not affect strength and stability

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

3735. Stokes law is valid only if the size of particle is________________?
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A. less than 0.0002 mm

B. greater than 0.2 mm

C. between 0.2 mm and 0.0002 mm

D. all of the above

3736. Valid range for S, the degree of saturation of soil in percentage is______________?
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A. 0 < S < 100

B. S<0

C. 0<S<100

D. S>0

3737. If the water content of a fully saturated soil mass is 100%, then the voids ratio of the sample is________________?
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A. greater than specific gravity of soil

B. equal to specific gravity of soil

C. independent of specific gravity of soil

D. less than specific gravity of soil

3738. Which of the following methods is most accurate for the determination of the water content of soil ?
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A. oven drying method

B. calcium carbide method

C. sand bath method

D. pycnometer method

3739. Rise of water table above the ground surface causes________________?
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A. decrease in pore water pressure but increase in total stress

B. equal decrease in pore water pressure and total stress

C. equal increase in pore water pressure and total stress

D. increase in pore water pressure but decrease in total stress

3740. For proper field control, which of the following methods is best suited for quick determination of water content of a soil mass ?
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A. sand bath method

B. calcium carbide method

C. oven drying method

D. alcohol method

3741. Effective stress is______________?
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A. all of the above

B. the stress at particles contact

C. a physical parameter that can be measured

D. important because it is a function of engineering properties of soil
3742. A soil has a bulk density of 22 kN/m3 and water content 10 %. The dry density of soil is_______________?
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A. 18.6 kN/m3

B. 20.0 kN/m3

C. 22.0 kN/m3

D. 23.2 kN/m3

3743. For better strength and stability, the fine grained soils and coarse grained soils are compacted respectively as____________________?
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A. dry of OMC and wet of OMC

B. dry of OMC and dry of OMC where OMC is optimum moisture content

C. wet of OMC and wet of OMC

D. wet of OMC and dry of OMC
3744. A 300 mm square bearing plate settles by 15 mm in a plate load test on a cohesive soil when the intensity of loading is 0.2 N/mm2. The settlement of a prototype shallow footing 1 m square under the same intensity of loading is___________________?
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A. 167 mm

B. 30 mm

C. 15 mm

D. 50 mm
3745. Due to a rise in temperature, the viscosity and the unit weight of the percolating fluid are reduced to 60% and 90% respectively. If other things remain constant, the coefficient of permeability__________________?
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A. increases by 50%

B. decreases by 33.3%

C. increases by 25%

D. increases by 33.3%

3746. The angle that Coulombs failure envelope makes with the horizontal is called________________?
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A. angle of internal friction

B. none of the above

C. cohesion

D. angle of repose

3747. The value of compression index for a remoulded sample whose liquid limit is 50% is______________?
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A. 36

B. 0.28

C. 0.028

D. 0.036

3748. Which of the following methods is best suited for determination of permeability of coarse-grained soils ?
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A. constant head method

B. falling head method

C. both the above

D. none of the above

3749. Terzaghis bearing capacity factors Nc, Nq and Nr are functions of______________?
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A. cohesion only

B. angle of internal friction only

C. both cohesion and angle of internal friction

D. none of the above

3750. Compressibility of sandy soils is______________?
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A. much greater than that of clayey soils

B. none of the above

C. almost equal to that of clayey soils

D. much less than that of clayey soils