Soil Mechanics foundation 5

 81.The void ratio for saturated soil is equal to the ........... of water content and specific of solids ?

• sum 
• difference 
• product 
• ratio 

82.The vertical deformation of soil mass consists of ?

• deformation of soil grains 
• compression of pore fluid 
• reduction of pore space 
• all of these 

83.According to Indian standards, the dispersing solution used in pipette method, for the determination of size of particle consists of ?

• 7 g sodium carbonate, 43 g sodium hexameta-phosphate and 1 litre distilled water 
• 7 g sodium carbonate, 33 g sodium hexameta-phosphate and 1 litre distilled water 
• 7 g sodium carbonate, 23 g sodium hexameta-phosphate and 1 litre distilled water 
• any one of the above 

84.Which of the following gives the correct decreasing order of the densities of a soil sample ?

• Saturated, submerged, wet, dry 
• Saturated, wet, submerged, dry 
• Saturated, wet, dry, submerged 
• Wet, saturated, submerged, dry 

85.The equipotential line in a seepage through a soil medium is defined as the ?

• path of particles of water through a saturated soil mass 
• line connecting points of equal head of water 
• flow of movement of fine particles of soil 
• direction of the flow particle 

86.The neutral stress is ?

• transmitted through the points of contact of the interconnected particles of soil 
• transmitted to the soil base through the pore water 
• independent of the depth of water above the soil mass 
• due to weight of soil particles 

87.The ultimate settlement of a soil ?

• is directly proportional to the compression index 
• decreases with an increase in the initial void ratio 
• is directly proportional to the depth of the compressible soil mass 
• all of the above 

88.If the soil below the base of the footing is dry or moist, the confining pressure is approximately .......... the confining pressure available when the water table is at the base of the footing ?

• equal to 
• double 
• three times 
• four times 

89.Which of the following clay mineral gives maximum swelling ?

• Kalonite 
• Montmorillonite 
• Illite 
• all of these

90.The ratio of the unconfined compressive strength of undisturbed soil to the unconfined compressive strength of soil in a remoulded state, is called ?

• sensitivity 
• thixotropy 
• relative density 
• bulk density.

91.The hydraulic gradient provided at the downstream side of a hydraulic structure such as a dam is called ?

• downstream gradient 
• tail water gradient 
• exit gradient 
• any one of these 

92.For engineering purposes, soil is defined as ?

• the loose mantle at the surface of the earth which favours the growth of plant 
• a natural aggregate of mineral grains, loose or moderately cohesive, inorganic or organic in nature 
• a disintegrated rock 
• all of the above 

93.The lateral earth pressure exerted by the soil when the retaining wall moves into the soil, is known as ?

• earth pressure at rest 
• active earth pressure 
• passive earth pressure 
• total earth pressure 

94.The strength of a soil is usually identified by ?

• direct tensile stress 
• direct compressive stress 
• ultimate shear stress 
• effective stress 

95.The frictional resistance offered by sand is ?

• sliding friction 
• rolling friction 
• resistance due to interlocking 
• all of these 

96.Which of the following statement is correct ?

• The flow lines are perpendicular to equipotential lines 
• No two flow lines or equipotential lines start from the same point 
• No two flow lines cross each other 
• all of the above 

97.The plastic limit exists in ?

• sandy soils 
• gravel soils 
• silty soils 
• silty soils 

98.The average velocity of flow that will take place through the total cross-sectional area of soil under unit hydraulic gradient is called ?

• uniformity coefficient 
• Darcy's coefficient 
• coefficient of permeability 
• terminal velocity 

99.The shear strength of a soil ?

• is proportional to the cohesion of the soil 
• is proportional to the tangent of the angle of internal friction 
• increases with the increase in normal stress of soil 
• all of the above

100.The maximum size of the particles of clay is about ?

• 0.0002 mm 
• 0.002 mm 
• 0.02 mm 
• 0.2 mm.