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 water(γω) 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)