State the correct answer. Also, provide reasons to JUSTIFY THE STATEMENT PROVIDI
ID: 1711302 • Letter: S
Question
State the correct answer. Also, provide reasons to JUSTIFY THE STATEMENT PROVIDING YOUR JUSTIFICATION IN YOUR ANSWER BOOK along with the question number. (i) The coefficient of permeability of uniform sand is lower than well graded sand. (ii) The soil at a depth of 2 m will be subjected to higher stress due to the load associated with the construction of 10 residential storey structure (i.e., 30 m high) compared to 10 m high earthen embankment. (iii) The degree of saturation of a compacted specimen at wet of optimum water content is always lower than 100%. (iv) The pore-water pressures are likely to be negative in typical over consolidated clay samples when they are subjected to shear loading in a triaxial test apparatus with a confining pressure lower than their pre-consolidation pressure. (vi) The direct shear test apparatus can be used for reliably determining the shear strength parameters of sand under unconsolidated and undrained conditions (i.e., UU).Explanation / Answer
1. true
k value relies on void ratio
A well graded soil conatins wide range of size varying from Sieve 4 to sieve 20
more will be voids when compared to uniform sand
2. false
because
unit wt of concrete = 25 kn/m^2 which realtively less when compared to unit weight of earthendam material
we get higher stress from dam
3.true
because when we compacted the wet specimen , water in the voids goes out , some of voids may gets empty
and then it leads to degree of satuartion less then 100 %
4.false
because here confing pressure are lower than preconsolidated soils and hence no chance will be their to act pore wter pressure in negative direction
5.true
direct shear test can be coducted for sand soils in under cosolidated soils or over consolidated soils in any conditions
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