Practice Test: Question Set - 20
1. A moist soil sample of volume 60 cc. weighs 108 g and its dried weight is 86.4 g. If its absolute density is 2.52, the degree of saturation is
- (A) 54 %
- (B) 64 %
- (C) 74 %
- (D) 84 %
2. The hydraulic head that would produce a quick condition in a sand stratum of thickness 1.5 m, specific gravity 2.67 and voids ratio 0.67 is equal to
- (A) 1.0 m
- (B) 1.5 m
- (C) 2.0 m
- (D) 3 m
3. The maximum water content at which a reduction in water content does not cause a decrease in volume of a soil mass, is known
- (A) Liquid limit
- (B) Plastic
limit
- (C) Shrinkage
limit
- (D) Permeability
limit
4. Clay layer ‘A’ with single drainage and coefficient of consolidation Cv takes 6 months to achieve 50% consolidation. The time taken by clay layer ‘B’ of the same thickness with double drainage and coefficient of consolidation Cv/2 to achieve the same degree of consolidation is
- (A) 3 months
- (B) 6 months
- (C) 12 months
- (D) 24 months
5. The factor which affects the compaction, is
- (A) Moisture
content
- (B) Compacting
content
- (C) Method
of compaction
- (D) All
the above
6. In a consolidated drained test on a normally consolidated clay, the volume of the soil sample during shear
- (A) Decreases
- (B) Increases
- (C) Remains unchanged
- (D) First increases and then decreases
7. Pick up the correct statement from the following:
- (A) The
rise of the ground surface due to frost action is called frost heave
- (B) The
freezing of water is accompanied by a volume increase of 9%
- (C) Below
freezing point, higher soil suction develops
- (D) All the
above
8. During the first stage of triaxial test when the cell pressure is increased from 0.10 N/mm² to 0.26 N/mm², the pore water pressure increases from 0.07 N/mm² to 0.15 N/mm². Skempton's pore pressure parameter ‘B’ is
- (A) 0.5
- (B) -0.5
- (C) 2.0
- (D) -2.0
9. The maximum value of effective stress in the past divided by the present value is defined as over consolidation ratio (OCR). The O.C.R. of an over consolidated clay is
- (A) Less than 1
- (B) 1
- (C) More than 1
- (D) None of
these
10. A 300 mm square bearing plate settles by 15 mm in a plate load test on a cohesive soil when the intensity of loading is 0.2 N/mm2. The settlement of a prototype shallow footing 1 m square under the same intensity of loading is
- (A) 15 mm
- (B) 30 mm
- (C) 50 mm
- (D) 167 mm
11. The effective size of particles of soil is denoted by
- (A) D10
- (B) D20
- (C) D30
- (D) D60
12. Valid range for n, the percentage voids, is
- (A) 0 < n < 100
- (B) 0 ≤ n ≤ 100
- (C) n > 0
- (D) n < 0
13. If S, L and R are the arc length, long chord and radius of the sliding circle then the perpendicular distance of the line of the resultant cohesive force, is given by
- (A) a = S.R/L
- (B) a = L.S/R
- (C) a = L.R/S
- (D) None of
these
14. Uniformity coefficient of a soil is
- (A) Always less than 1
- (B) Always equal to 1
- (C) Equal to or less than 1
- (D) Equal to or greater than 1
15. The fluid generally used for grouting is
- (A) Cement and
water mix
- (B) Clay
suspension
- (C) Sodium
silicate
- (D) All the
above