Foundation Engineering Competitive Exam Questions - Set 20 - ObjectiveBooks

# 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 SL 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

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