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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