Questions and Answers of Density Index and Relative Compaction in Soil Mechanics for Civil Engineering.
How the density index ID in the terms of densities is given?
(A). (γd,max−γd,min)γd,max(γd,max−γ(D).γd
(B). (γd−γd,min)γd,max(γd,max−γd,min)γd
(C). (γd−γd,min)γd,max(γd−γd,max)γd
(D). (γd−γd,min)γd,max(γd,max−γ(D).γd
(E). None of these
Multiple Choice Question Answer: b
For the cohesion-less soil, we use the term density index ID.
(A). True
(B). False
(C). Partially True
Multiple Choice Question Answer: a
Density index ID doesn’t express the relative compactness of the natural cohesion-less soil.
(A). True
(B). False
(C). Partially True
Multiple Choice Question Answer: b
When the natural state of the cohesion-less soil is in its loosest form, to what its density index ID is equal?
(A). 0
(B). 0.5
(C). 1
(D). 1.5
(E). None of these
Multiple Choice Question Answer: a
What is the density index of natural deposit in its densest state?
(A). 0
(B). 0.5
(C). 1
(D). 1.5
(E). None of these
Multiple Choice Question Answer: c
How the relative compaction Rc is given?
(A). γd,max/γd
(B). γd/γd,min
(C). γd/γd,max
(D). γd,min/γd
(E). None of these
Multiple Choice Question Answer: c
What is the formula for density index ID?
(A). (emax – e)
(B). (emax–e)(emin−e)
(C). (emax–emin)(emax−e)
(D). (emax–e)(emax−emin)
(E). None of these
Multiple Choice Question Answer: d
What is the range in percentage of the relative density of loose granular soil?
(A). 0-15
(B). 15-35
(C). 35-65
(D). 85-100
(E). None of these
Multiple Choice Question Answer: b
What would be the relative density of the soil if the soil has a dry density of 17.5kN/m3 and it has the densities corresponding to the most compact and the loosest states as 18.5 kN/m3 and 13 kN/m3 respectively?
(A). 0.871
(B). 0.865
(C). 0.869
(D). 0.860
(E). None of these
Multiple Choice Question Answer: b
The soil has a porosity of 30%, its voids ratio in the loosest and densest state is 0.35 and 0.92 respectively, so its density index is ___
(A). 0.865
(B). 0.872
(C). 0.861
(D). 0.881
(E). None of these
Multiple Choice Question Answer: c
When soil is in the loosest form, what would be the relative compaction if the Rc density index is zero?
(A). 40%
(B). 60%
(C). 80%
(D). 100%
(E). None of these
Multiple Choice Question Answer: c
The relative compaction Rc is related to the void ratio of soil by _____
(A). (1+e)(1+emax)
(B). (1+e)(1+emin)
(C). (1+emin)(1+e)
(D). (1+emax)(1+emin)
(E). None of these
Multiple Choice Question Answer: c
