101.Chemical weathering of soil is caused due to ?
- oxidation
- hydration
- carbonation and leaching
- all of these
102.The maximum water content of a saturated soil at which a reduction in its moisture does not cause a decrease in volume of the soil, is called ?
- liquid limit
- plastic limit
- elastic limit
- shrinkage limit
103.The ratio of settlement at any time (t) to the final settlement is known as ?
- compression index
- coefficient of consolidation
- degree of consolidation
- none of these
104.Soils are derived from ?
- igneous rocks
- sedimentary rocks
- metamorphic rocks
- any one of these
105.The degree of saturation for the moist soil is about ?
- 0%
- 1 to 25%
- 25 to 50%
- 50 to 75%
106.Which of the following is highly permeable ?
- Gravel
- Sand mixture
- Coarse sand
- Clay
107.The contact pressure of flexible footing on non-cohesive soils is ?
- more in the centre than at the edges
- less in the centre than at the edges
- uniform throughout
- none of these
108.The quantity of seepage of water in a soil medium is ?
- directly proportional to the head of water at upstream
- inversely proportional to the head of water at upstream
- directly proportional to the coefficient of permeability
- inversely proportional to the coefficient of permeability
109.A soil having uniformity co-efficient more than 10, is called ?
- uniform soil
- poor soil
- well graded soil
- coarse soil
110.The rate of expulsion of pore fluid is directly dependent on the ............. ?
- shear strength
- void ratio
- permeability
- none.
111.The standard temperature at which the hydrometer is calibrated is ?
- 10° C
- 15° C
- 20° C
- 27° C
112.Mechanical weathering of soils is caused by ?
- periodical temperature changes
- splitting action of flowing water
- splitting action of ice
- all of these
113.For a given soil mass, the void ratio is 0.60, water content is 18 % and specific gravity of the soil particles is 2.6. The degree of saturation of the soil is ?
- 30%
- 50%
- 78%
- 82.5%
114.A flow net is used to determine the ?
- seepage flow
- seepage pressure
- exit gradient
- all of these
115.The contact pressure of rigid footing on cohesive soils is ?
- more in the centre than at the edges
- less in the centre than at the edges
- uniform throughout
- none of these
116.The exit gradient of the seepage of water through a soil medium is the ?
- slope of the flow line
- slope of the equi-potential
- ratio of total head to the length of seepage
- ratio of the head loss to the length of seepage
117.The unit weight of a soil at zero air voids depends upon ?
- unit weight of water
- water content
- specific gravity
- all of these
118.When the particles of soil are oriented 'edge to edge' or 'edge to face' with respect to another, the soil is said to have ?
- single grained structure
- double grained structure
- honey-combed structure
- flocculent structure
119.The angle of internal friction ?
- varies with the density of sand
- depends upon the amount of interloading
- depends upon the particle shape and roughness
- all of the above
120.The settlement of a footing in sand depends upon the ?
- stress deformation characteristics of sand
- relative density of the sand
- width of the footing
- all of these.
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