civil engineering MCQs – Page 190

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 Review each marked answer and report any item that may be outdated or unclear.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
3781. Residual soils are formed by______________?
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A. none of the above

B. water

C. glaciers

D. wind

3782. The maximum dry density upto which any soil can be compacted depends upon____________?
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A. moisture content only

B. amount of compaction energy only

C. both moisture content and amount of compaction energy

D. none of the above

3783. The clay mineral with the largest swelling and shrinkage characteristics is_______________?
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A. none of the above

B. montmorillonite

C. kaolinite

D. illite

3784. The effect of cohesion on a soil is to______________?
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A. reduce both the active earth pressure intensity and passive earth pressure intensity

B. increase both the active earth pressure intensity and passive earth pressure intensity

C. reduce the active earth pressure in-tensity but to increase the passive earth pressure intensity

D. increase the active earth pressure in-tensity but to reduce the passive earth pressure intensity

3785. Coefficient of consolidation for clays normally_______________?
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A. first increases and then decreases with increase in liquid limit

B. increases with increase in liquid limit

C. decreases with increase in liquid limit

D. remains constant at all liquid limits

3786. Direct measurement of permeability of the specimen at any stage of loading can be made_______________?
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A. only in fixed ring type consolido-meter

B. only in floating ring type consolido-meter

C. both (A) and (B)

D. none of the above

3787. Voids ratio of a soil mass can_________________?
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A. take any value greater than zero

B. be zero

C. never be greater than unity

D. take values between 0 and 1 only

3788. Constant head permeameter is used to test permeability of_______________?
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A. coarse sand

B. fine sand

C. clay

D. silt

3789. Relative density of a compacted dense sand is approximately equal to_____________?
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A. 0.6

B. 1.2

C. 0.4

D. 0.95
3790. If the natural water content of soil mass lies between its liquid limit and plastic limit, the soil mass is said to be in______________?
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A. semi-solid state

B. liquid state

C. plastic state

D. solid state

3791. If the material of the base of the Casagrande liquid limit device on which the cup containing soil paste drops is softer than the standard hard rubber, then______________?
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A. the liquid limit of soil always increases

B. the liquid limit of soil always decreases

C. the liquid limit of soil may decrease

D. the liquid limit of soil may increase

3792. Which of the following methods is more suitable for the determination of permeability of clayey soil ?
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A. horizontal permeability test

B. falling head method

C. none of the above

D. constant head method

3793. Terzaghis general bearing capacity formula for a strip footing (C Nc + y D Nq + 0.5 Y NTB. gives______________?
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A. net ultimate bearing capacity where C = unit cohesion

B. ultimate bearing capacity

C. net safe bearing capacity

D. safe bearing capacity

3794. Unconfmed compressive strength test is________________?
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A. consolidated undrained test

B. drained test

C. undrained test

D. consolidated drained test

3795. A normally consolidated clay settled 10 mm when effective stress was increased from 100 kN/m2 to 200 kN/ m2. If the effective stress is further increased from 200 kN/ m2 to 400 kN/ m2, then the settlement of the same clay is__________________?
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A. none of the above

B. 10 mm

C. 40 mm

D. 20 mm

3796. Select the incorrect statement ?
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A. is limited to a maximum value of 45

B. is rarely more than 30 for fine grained soil

C. increases as the size of particles increases

D. ective angle of shearing resistance

E. increases as the soil gradation im-proves

3797. Shear strength of a soil is a unique function of__________________?
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A. effective stress only

B. total stress only

C. both effective stress and total stress

D. none of the above

3798. A pycnometer is used to determine_______________?
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A. water content and voids ratio

B. specific gravity and dry density

C. voids ratio and dry density

D. water content and specific gravity
3799. Degree of consolidation is________________?
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A. directly proportional to drainage path and inversely proportional to time

B. directly proportional to time and inversely proportional to drainage path

C. directly proportional to time and inversely proportional to square of drainage path

D. directly proportional to square of drainage path and inversely proportional to time

3800. With the increase in the amount of compaction energy________________?
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A. optimum water content increases but maximum dry density decreases

B. optimum water content decreases but maximum dry density increases

C. both optimum water content and maximum dry density increase

D. both optimum water content and maximum dry density decrease