Soil Mechanics foundation 4

 61.The soil transported by wind is called ?

• aeolian soil 
• marine soil 
• alluvial soil 
• lacustrine soil 

62.According to Stoke's law, the velocity at which grains settle out of suspension, all other factors being equal, is dependent upon ?

• shape of the grain 
• weight of the grain 
• size of the grain 
• all of these 

63.The soil transported by running water is called ?

• aeolian soil 
• marine soil 
• alluvial soil 
• lacustrine soil 

64.A civil engineer is concerned mainly with ........ top mantle of soil in dealing with small and medium sized projects ?

• 2 to 5 m 
• 5 to 8 m 
• 8 to 10 m 
• 10 to 15 m

65.The high density of the soil placed in a fill is desired in order to ?

• increase its shear resistance 
• reduce future settlements 
• reduce percolation through the fill 
• all of these 

66.If the pores of a soil are completely full of air only, the soil is said to be ?

• wet soil 
• dry soil 
• fully saturated soil 
• partially saturated soil 

67.A dry soil sample weighing 100 g has volume of 60 ml and specific gravity 2.5. Its void ratio ?

• 0.4 
• 0.5 
• 0.6 
• 0.8 

68.The property of a soil which is of great importance in finding settlement of structures, is ?

• permeability 
• shear strength 
• consolidation 
• compressibility 

69.The bearing capacity of a soil depends upon ?

• grain size of the soil 
• size of the footing 
• shape of the footing 
• all of these 

70.The flow index in soils indicates the ?

• ratio of liquid limit to plastic limit 
• variation of liquid limit 
• variation of plastic limit 
• shear strength variation with water content.

71.If the direction of flow of water is parallel to the planes of stratification, then the permeability is ........ times more than in a direction perpendicular to them ?

• 2 to 10 
• 2 to 15 
• 2 to 20 
• 2 to 30 

72.Quick sand is a ?

• moist sand containing small particles 
• condition which occurs in coarse sand 
• condition in which a cohesionless soil loses all its strength because of upward flow of water 
• none of the above 

73.The coefficient of consolidation is used for evaluating ?

• stress in the soil 
• total settlement 
• over consolidation ratio 
• time rate of settlement 

74.A fine grained soil ?

• has low permeability 
• has high compressibility 
• may or may not be plastic 
• all of these 

75.The critical gradient of the seepage of water ?

• directly proportional to void ratio 
• increases with the decrease in void ratio 
• inversely proportional to specific gravity 
• increases with the decrease in specific gravity of soil 

76.Lacustrine soils are those soils which are ?

• deposited in sea water 
• deposited at the bottom of the lakes 
• transported by running water 
• transported by wind 

77.Residual soils are ?

• sands 
• silts 
• clays 
• all of these 

78.The ratio of the unit weight of soil solids to that of water is called ?

• void ratio 
• porosity 
• specific gravity 
• degree of saturation 

79.The approximate void ratio in sandy soils is ?

• 0.2 
• 0.6 
• 0.8 
• 1.2 

80.The moisture contents of a clayey soil is gradually decreased from a large value. The correct sequence of the occurrence of the limits will be ?

• liquid limit, plastic limit and shrinkage limit 
• plastic limit, liquid limit and shrinkage limit 
• shrinkage limit, plastic limit and liquid limit 
• plastic limit, shrinkage limit and liquid limit.