civil engineering MCQs – Page 187

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 Review each marked answer and report any item that may be outdated or unclear.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
3721. 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

3722. 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

3723. 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

3724. 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

3725. 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
3726. 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

3727. 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

3728. 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

3729. 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

3730. 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

3731. 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

3732. 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 %

3733. 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

3734. 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

3735. 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

3736. 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

3737. 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

3738. 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

3739. 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

3740. 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