SSC JE Civil Engineering 25-Sep-2019 Shift 1 Solved Paper

Question : 133 of 200

Marks: +1, -0

The volume and weight of air, water and solids in a soil mass are given in the table.

Constituent	Volume (cm $^{3}$ )	Weight (g)
Air	0.2	0
Water	0.3	0.3
Solids	0.5	1.0

Consider the following statement (S1 to S4) with respect to the table.
S1: Soil is partially saturated with degree of saturation = 60%
S2 : Void ratio = 40%
S3 : Water Content = 30%
S4 : Saturated unit weight = 1.5 g/cm

^{3}

Which of the statements is correct?

S2, S3 and S4
S1, S2 and S3
S1, S2 and S4
S1, S3 and S4

Validate

Solution:

∵ Saturation =

V_w/V_s=0.3/ 0.5=

0.60 = 60%
∵ Void ratio (e) =

V_v/V_s=0.5/0.5=1

(∵

V_v

= 0.5)
∵ Water content (w) =

{\wt \of \water}/{\wt \of \solid}= 0.3/1=30%

[\table ∵ \Se= w_c n ;0.6× 1 =0.3n;n=2]

So, saturated unit weight

Y_s =({2+1}/2)×1 = 1.5 \g\/cm^3

Hence option (d) is correct.

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