MCQ Exam Questions Foundation Engineering - Set 15 - ObjectiveBooks

# Practice Test: Question Set - 15

1. If there is no impervious boundary at the bottom of a hydraulic structure, stream lines tend to follow:
(A) A straight line
(B) A parabola
(C) A semi-ellipse
(D) A semi-circle

2. If a cohesive soil specimen is subjected to a vertical compressive load, the inclination of the cracks to the horizontal is
(A) 90°
(B) 45°
(C) 22.5°
(D) 0°

3. The Westergaard analysis is used for
(A) Sandy soils
(B) Cohesive soils
(C) Stratified soils
(D) Clayey soils

4. Cohesive soils are generally
(A) Plastic and also compressible
(B) Elastic and also compressible
(C) Plastic but incompressible
(D) None of these

5. Coefficient of earth pressure at rest is
(A) Less than active earth pressure but greater than passive earth pressure
(B) Greater than active earth pressure but less than passive earth pressure
(C) Greater than both the active earth pressure and passive earth pressure
(D) Less than both the active and passive earth pressures

6. The ratio of the volume of voids to the total volume of the given soil mass, is known
(A) Porosity
(B) Specific gravity
(C) Void ratio
(D) Water content

7. The total weight of a pycnometer with water and oven dried soil 20 (g) is 1600 g. The pycnometer filled with water alone weighs 1500 g. The specific gravity of the soil, is
(A) 1.0
(B) 1.5
(C) 2.0
(D) 2.5

8. In the plate loading test for determining the bearing capacity of soil, the size of square bearing plate should be
(A) Less than 300 mm
(B) Between 300 mm and 750 mm
(C) Between 750 mm and 1 m
(D) Greater than 1 m

9. If the specific gravity of a soil particle of 0.05 cm diameter is 2.67, its terminal velocity while settling in distilled water of viscosity, 0.01 poise, is
(A) 0.2200 cm/sec
(B) 0.2225 cm/sec
(C) 0.2250 cm/sec
(D) 0.2275 cm/sec

10. The shear strength in plastic undrained clay, is due to
(A) Inter-granular friction
(B) Internal friction
(C) Cohesion
(D) None of these

11. A fully saturated soil is said to be
(A) One phase system
(B) Two phase system with soil and air
(C) Two phase system with soil and water
(D) Three phase system

12. Pick up the incorrect statement from the following:
(A) Compaction has no effect on the structure of a soil
(B) Permeability decreases with increase in the dry density of a compacted soil
(C) A wet side compacted soil is more compressible than a dry side compacted soil
(D) Dry side compaction soils swell more when given access to moisture

13. A pycnometer is used to determine
(A) Voids ratio
(B) Dry density
(C) Water content
(D) Density index

14. If the volume of voids is equal to the volume of solids in a soil mass, then the values of porosity and voids ratio respectively are
(A) 1.0 and 0.0
(B) 0.0 and 1.0
(C) 0.5 and 1.0
(D) 1.0 and 0.5

15. The compressibility of clays is caused due to:
(A) Expulsion of double layer water from in between the grains
(B) Sliping of particles to new positions of greater density
(C) Bending of particles as elastic sheets
(D) All the above

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