Questions and answers for exam Preparation

MCQs

Total Questions : 1204 | Page 9 of 121 pages

Question 81. 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

7°
10°
12°
17°

Discuss Question

Answer: Option C. -> 12°

Question 82. The total and effective stresses at a depth of 5 m below the top level of water in a swimming pool are respectively

zero and zero
0.5 kg/cm² and zero
0.5 kg/cm² and 0.5 kg/cm²
1.0 kg/cm² and 0.5 kg/cm²

Discuss Question

Answer: Option B. -> 0.5 kg/cm² and zero

Question 83. 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

increases by 25%
increases by 50%
increases by 33.3%
decreases by 33.3%

Discuss Question

Answer: Option B. -> increases by 50%

Question 84. At liquid limit, all soils possess

same shear strength of small magnitude
same shear strength of large magnitude
different shear strengths of small magnitude
different shear strengths of large magnitude

Discuss Question

Answer: Option A. -> same shear strength of small magnitude

Question 85. Sensitivity of a soil can be defined as

percentage of volume change of soil under saturated condition
ratio of compressive strength of unconfined undisturbed soil to that of soil in a remoulded state
ratio of volume of voids to volume of solids
none of the above

Discuss Question

Answer: Option B. -> ratio of compressive strength of unconfined undisturbed soil to that of soil in a remoulded state

Question 86. Valid range for n, the percentage voids, is

0 < n < 100
0 ≤ n ≤ 100
n > 0
n < 0

Discuss Question

Answer: Option A. -> 0 < n < 100

Question 87. Rankine’s theory of earth pressure assumes that the back of the wall is

plane and smooth
plane and rough
vertical and smooth
vertical and rough

Discuss Question

Answer: Option C. -> vertical and smooth

Question 88. With the increase in the amount of compaction energy

optimum water content increases but maximum dry density decreases
optimum water content decreases but maximum dry density increases
both optimum water content and maximum dry density increase
both optimum water content and maximum dry density decrease[ES 93]

Discuss Question

Answer: Option B. -> optimum water content decreases but maximum dry density increases

Question 89. The most suitable method for drainage of fine grained cohesive soils is

well ppint system
vacuum method
deep well system
electroosmosis method

Discuss Question

Answer: Option D. -> electroosmosis method

Question 90. In a deposit of normally consolidated clay

effective stress increases with depth but water content of soil and un-drained strength decrease with depth
effective stress and water content increase with depth but undrained strength decreases with depth
effective stress and undrained strength increase with depth but water content decreases with depth
effective stress, water content and undrained strength decrease with depth

Discuss Question

Answer: Option C. -> effective stress and undrained strength increase with depth but water content decreases with depth