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Civil Engineering - Soil Mechanics and Foundation Engineering

Exercise : Soil Mechanics and Foundation Engineering - Section 3
31.
Pick up the incorrect statement from the following:
The smaller the size of the pores, the higher the water can rise above the water table.
Below the water table, the pore water may be static.
The hydrostatic pressure depends on the depth below the water level.
The attractive forces between the particles, caused due to negative pressure of water held above the water table is called soil suction.
None of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
The maximum water content at which a reduction in water content does not cause a decrease in volume of a soil mass, is known
liquid limit
plastic limit
shrinkage limit
permeability limit.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
A sample of saturated soil has 30% water content and the specific gravity of soil grains is 2.6. The dry density of the soil mass in g/cm3, is
1.47
1.82
1.91
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
The specific gravity of sands, is approximately
1.6
2.0
2.2
2.4
2.6
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
If the coefficients of volume change and compressibility of a soil sample are respectively 6.75 x 10-2 and 3 x 10-2, the void ratio of the soil sample, is
1.10
1.15
1.20
1.25
1.30
Answer: Option
Explanation:

Coeff.compressibility = Coeff.volume change/(1 + e).

(1 + e) = Coeff.volume change/Coeff.compressibility.

e = (Coeff.volume change/Coeff.compressibility) - 1.

e = ((6.75 x 10-2)/(3 x 10-2)) - 1.

e = 2.25 - 1.

e = 1.25.

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