Practice Test: Question Set - 11
1. If the bulk density of the soil is ‘ρ’ and water content ‘ω’, then dry density of the soil, is
- (A) 1 + (ω/ρ)
- (B) (1 + ρ)/ω
- (C) ρ/(1 + ω)
- (D) ω/(1 + ρ)
2. The clay mineral with the largest swelling and shrinkage characteristics is
- (A) Kaolinite
- (B) Illite
- (C) Montmorillonite
- (D) None of the above
3. The length/diameter ratio of cylindrical specimens used in triaxial test, is generally
- (A) 1
- (B) 1.5
- (C) 2
- (D) 2.5
4. The maximum load carried by a pile, when it continues to sink without further increase of load, is known as
- (A) Ultimate
load carrying capacity
- (B) Ultimate
bearing capacity
- (C) Ultimate
bearing resistant
- (D) All the
above
5. The seepage exit gradient in a soil is the ratio of
- (A) Total head
to the length of seepage
- (B) Flow
line to slope
- (C) Head
upstream to that at downstream
- (D) Head
loss to the length of the seepage
6. Which of the following methods is more suitable for the determination of permeability of clayey soil?
- (A) Constant head method
- (B) Falling head method
- (C) Horizontal permeability test
- (D) None of the above
7. A structure is erected on an impervious clay whose thickness is 12 m. Drainage is possible both at upper and lower surfaces. Coefficient of consolidation is 0.015 cm2 per minute. For attaining 50% consolidation with a time factor 0.20, the number of days required
- (A) 3233
- (B) 3123
- (C) 33331
- (D) 3313
8. The ratio of the difference between the void ratio of the soil in its loosest state and its natural void ratio (e) to the difference between the void ratios in the loosest and fully dense state, is generally termed as
- (A) Degree
of density
- (B) Relativity
- (C) Density
index
- (D) All the
above
9. For determining the ultimate bearing capacity of soil, the recommended size of a square bearing plate to be used in load plate test should be 30 to 75 cm square with a minimum thickness of
- (A) 5
mm
- (B) 10 mm
- (C) 15
mm
- (D) 25
mm
10. Within the consolidation process of a saturated clay
- (A) A gradual increase in neutral pressure and a
gradual decrease in effective pressure take place and sum of the two is
constant
- (B) A gradual decrease in neutral pressure and a
gradual increase in effective pressure take place and sum of the two is
constant
- (C) Both neutral pressure and effective pressure
decrease
- (D) Both neutral pressure and effective pressure
increase
11. An unsaturated 100 cm3 sample of soil weighs 190 g. If its dried weight is 160 g, water content of the soil, is
- (A) 0.188
- (B) 0.288
- (C) 0.388
- (D) 0.588
12. Pick up the correct statement from the following:
- (A) If
the ratio of depth to width is less than 2, it is shallow foundation
- (B) If
the ratio of depth to width is more than 2, it is deep foundation
- (C) If
the ratio of the length to width is between 1 and 2, it is spread foundation
- (D) All the
above
13. Pick up the correct statement from the following:
- (A) A
maximum value of dry density is obtained at optimum water content
- (B) At
low value of water content most soils tend to be stiff
- (C) At
high water content, the dry density decreases with an increase of water content
- (D) All the
above
14. Select the correct statement.
- (A) Coefficient of compressibility of an
over-consolidated clay is less than that of a normally consolidated clay
- (B) Coefficient of compressibility of an
over-consolidated clay is greater than that of a normally consolidated clay
- (C) Coefficient of compressibility is constant
for any clay
- (D) None of the above
15. Pick up the correct statement from the following:
- (A) Isotropic
consolidation of clay can be obtained in the triaxial apparatus under equal
all-round pressure
- (B) If the
present effective stress is the maximum to which the clay has ever been
subjected, it is called normally consolidated clay
- (C) If the
present effective stress in the past was more than present effective stress, it
is called over-consolidated clay
- (D) All the
above
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