civil engineering MCQs – Page 188

Practise multiple-choice questions from civil engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

civil engineering Mcqs

3741. 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

3742. 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

3743. 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

3744. 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%

3745. 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

3746. 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

3747. 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

3748. 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

3749. 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

3750. Dispersed type of soil structure is an arrangement comprising particles having______________?
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A. face to face or parallel orientation

B. edge to face orientation

C. edge to edge orientation

D. all of the above

3751. The water content of soil, which represents the boundary between plastic state and liquid state, is known as_________________?
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A. liquid limit

B. shrinkage limit

C. plastic limit

D. plasticity index

3752. Within the consolidation process of a saturated clay__________________?
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A. a gradual increase in neutral pressure and a gradual decrease in effective pressure takes place and sum of the two is constant

B. a gradual decrease in neutral pressure and a gradual increase in effective pressure takes place and sum of the two is constant

C. both neutral pressure and effective pressure decrease

D. both neutral pressure and effective pressure increase

3753. In a consolidated drained test on a normally consolidated clay, the volume of the soil sample during shear________________?
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A. increases

B. decreases

C. first increases and then decreases

D. remains unchanged

3754. Rankines theory of earth pressure assumes that the back of the wall is_______________?
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A. plane and smooth

B. vertical and rough

C. plane and rough

D. vertical and smooth

3755. The hydrometer method of sedimentation analysis differs from the pipette analysis mainly in_____________?
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A. the method of taking observations

B. the principle of test

C. the method of preparation of soil suspension

D. all of the above

3756. Select the incorrect statement?
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A. Bearing capacity of a soil depends on the type of soil

B. Bearing capacity of a soil depends upon the amount and direction of load

C. Bearing capacity of a soil is indepen-dent of rate of loading

D. Bearing capacity of a soil depends upon shape and size of footing

3757. In a triaxial compression test when drainage is allowed during the first stage (i. e. application of cell pressure) only and not during the second stage (i.e. application of deviator stress at constant cell pressure), the test is known as__________________?
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A. unconsolidated drained test

B. consolidated undrained test

C. unconsolidated undrained test

D. consolidated drained test

3758. The flownet for an earthen dam with 30 m water depth consists of 25 potential drops and 5 flow channels. The coefficient of permeability of dam material is 0.03 mm/sec. The discharge per meter length of dam is________________?
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A. 0.0045 m3/sec

B. 0.1125m3/sec

C. 0.00018 nrVsec

D. 0.18m3/sec

3759. Select the correct statement?
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A. Unit weight does not affect per-meability

B. The greater the unit weight, the greater is permeability

C. The greater the unit weight, the smaller is permeability

D. The greater the viscosity, the greater is permeability

3760. A 600 mm square bearing plate settles by 15 mm in plate load test on a cohesionless soil under an intensity of loading of 0.2 N/ram2. The settlement of a prototype shallow footing 1 m square under the same intensity of loading is_______________?
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A. 25 mm

B. between 15 mm and 25 mm

C. 15 mm

D. greater than 25 mm

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