Civil Foundation Engineering Objective Questions - Set 04 - ObjectiveBooks

# Practice Test: Question Set - 04

1. Shear strength of a soil is a unique function of
(A) Effective stress only
(B) Total stress only
(C) Both effective stress and total stress
(D) None of the above

2. Laplacian fundamental equation for a non-compressible flow in three dimensions, is
(A) (δu/δx) + (δv/δy) + (δw/δz) = 0
(B) (δ2h/δx2) + (δ2h/δy2) + (δ2h/δz2) = 0
(C) (δ2ϕ/δx2) + (δ2ϕ/δy2) + (δ2ϕ/δz2) = ϕ
(D) None of these

3. 260 g of wet soil was taken in a pycnometer jar of weight 400 g in order to find the moisture content in the soil, with specific gravity of soil particles 2.75. The weight of soil and remaining water filled in pycnometer without air bubbles was 1415 g and the weight of pycnometer filled with water alone was 1275 g. The moisture content in the soil is
(A) 24.2 %
(B) 18.2 %
(C) 53.8 %
(D) None of these

4. The method of the slices is applicable to
(A) Homogenous soils
(B) Stratified soils
(C) Saturated soils
(D) Non-uniform slopes

5. The angle that Coulomb's failure envelope makes with the horizontal is called
(A) Cohesion
(B) Angle of internal friction
(C) Angle of repose
(D) None of the above

6. A flow net may be utilised for the determination of
(B) Seepage
(C) Hydrostatic pressure
(D) All the above

7. The compression index of a soil
(A) Decreases with an increase in the liquid limit
(B) Increases with an increase in the liquid limit
(C) Decreases with an increase in the plastic limit
(D) Is not related with plastic limit

8. If the coefficient of the active pressure Ka is 1/3, the coefficient of passive pressure Kp, is
(A) 1/3
(B) 2/3
(C) 1
(D) 3

9. Sensitivity of a soil can be defined as
(A) Percentage of volume change of soil under saturated condition
(B) Ratio of compressive strength of unconfined undisturbed soil to that of soil in a remoulded state
(C) Ratio of volume of voids to volume of solids
(D) None of the above

10. The intensity of active earth pressure at a depth of 10 metres in dry cohesionless sand with an angle of internal friction of 30° and with a weight of 1.8 t/m3, is
(A) 4 t/m2
(B) 5 t/m2
(C) 6 t/m2
(D) 7 t/m2

11. The soil moisture driven off by heat, is called
(A) Free water
(B) Hydroscopic water
(C) Gravity water
(D) None of these

12. Plasticity index is defined as the range of water content between
(A) Liquid and plastic limit
(B) Plastic limit and semi solid limit
(C) Semi-solid limit and liquid limit
(D) Liquid limit and solid limit

13. Bishop's method of stability analysis
(A) Is more conservative
(B) Neglects the effect of forces acting on the sides of the slices
(C) Assumes the slip surface as an arc of a circle
(D) All of the above

14. If the natural moisture content, the liquid limit and plastic limit of a soil sample are stated as 30.5%, 42.5% and 22.5% respectively, the ratio of liquidity index and plastic index, is
(A) 1/3
(B) 1/2
(C) 2
(D) 2½

15. You are given a sample of soil containing coarse grains to determine its water content, you will use
(A) Pycnometer
(B) Oven-drying method
(C) Calcium carbide method
(D) Alcohol method

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