Soil Mechanics and Foundation Civil Engineering Questions - Set 24 - ObjectiveBooks

# Practice Test: Question Set - 24

1. Which of the following soils has more plasticity index?
(A) Sand
(B) Silt
(C) Clay
(D) Gravel

2. The liquid limit and plastic limit exist in
(A) Sandy soils
(B) Silty soils
(C) Gravel soils
(D) Clay soils

3. For determining the moisture content of a soil sample, the following data is available Weight of container = 260 g, Weight of soil sample and = 320 g container, Weight of soil sample (dried) and = 310 g container. The moisture content of the soil sample, is
(A) 15 %
(B) 18 %
(C) 20 %
(D) 25 %

4. For a homogeneous earth dam 50 m high having 2 m free broad, a flow net was constructed and the results were : Number of potential drops = 2.4 Number of flow channels = 0.4. If co-efficiency of permeability of the dam material is 3 × 10-3 cm3/sec, the discharge per metre length of dam, is
(A) 12 × 10-5 m3/sec
(B) 24 × 10-3 m3/sec
(C) 6 × 10-5 m3/sec
(D) 24 × 10-5 m3/sec

5. The soil which contains finest grain particles, is
(A) Coarse sand
(B) Fine sand
(C) Silt
(D) Clay

6. Si particles
(A) Show dilatancy
(B) Swell when moist
(C) Possess high strength when dry
(D) Disintegrate easily

7. The fundamental equation of specific gravity (G), dry density (γd), unit weight of waterω) and void ratio (e), is
(A) e = Gγω/(1 + γd)
(B) G = γd. γω/(1 + e)
(C) γd = G. γω/(1 + e)
(D) γω = G. γd/(1 + e)

8. The minimum centre to centre distance of friction piles of 1 m diameter, is
(A) 2 m
(B) 2 m to 3 m
(C) 3 m to 4 m
(D) 5 m

9. When drainage is permitted under initially applied normal stress only and full primarily consolidation is allowed to take place, the test is known as
(A) Quick test
(B) Drained test
(C) Consolidated undrained test
(D) None of these

10. If the failure of a finite slope occurs through the toe, it is known as
(A) Slope failure
(B) Face failure
(C) Base failure
(D) Toe failure

11. The liquidity index is defined as a ratio expressed as percentage of
(A) Plastic limit minus the natural water content, to its plasticity index
(B) Natural water content minus its plastic limit to its plasticity index
(C) Natural water content plus its plastic limit to its plasticity index
(D) Liquid limit minus the natural water content to the plasticity index

12. Number of piles required to support a column, is
(A) 1
(B) 2
(C) 3
(D) 4

13. According to the Indian Standards the specific gravity is the ratio of the unit weight of soil solids to that of water at a temperature of
(A) 17°C
(B) 23°C
(C) 27°C
(D) 30°C

14. Maximum size of clay particles is:
(A) 0.002 mm
(B) 0.04 mm
(C) 0.06 mm
(D) 0.08 mm

15. The passive earth pressure of a soil is proportional to (where φ is the angle of internal friction of the soil.)
(A) tan (45° - φ)
(B) tan (45° + φ)
(C) tan2 (45° - φ)
(D) tan2 (45° + φ)

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