soil mechanics and foundation engineering Mcqs
101. 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

102. 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

103. 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

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

B. fine sand

C. clay

D. silt

105. 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
106. 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

107. 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

108. 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

109. 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

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

B. drained test

C. undrained test

D. consolidated drained test

111. 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

112. 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

113. 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

114. 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
115. 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

116. 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

117. Select the correct range of density index,ID ________________?
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A. 0 < lD < 1

B. 0 < ID < 1

C. ID>0

D. lD>0

118. At liquid limit, all soils possess________________?
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A. different shear strengths of small magnitude

B. different shear strengths of large magnitude

C. same shear strength of large magnitude

D. same shear strength of small magnitude
119. In a deposit of normally consolidated clay_________________?
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A. effective stress, water content and undrained strength decrease with depth

B. effective stress and undrained strength increase with depth but water content decreases with depth

C. effective stress and water content increase with depth but undrained strength decreases with depth

D. effective stress increases with depth but water content of soil and un-drained strength decrease with depth