BARC CE 2018 "Soil Mechanics & Foundation Engg." Nuclear Quiz 1

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Question 1

An excavation is made with a vertical face in a clay soil, which has c_u = 50 kN/m², γ = 18 kN/m³. For pure clay and vertical face, Taylor's Stability Number is 0.216, the maximum depth (in m) of excavation so that the excavation is stable is

• A6.65
• B10.63
• C12.86
• DNone of these

Question 2

List I and List II contains respectively terms and expressions related to soil classification. Match the two lists and select the correct answer using the codes given below the lists:
List-I
A) Activity number
B) Liquidity index
C) Sensitivity index
D) Consistency index
List-II
1.
2.
3.
4.

• AA-1 B-3 C-4 D-2
• BA-1 B-2 C-3 D-4
• CA-3 B-2 C-1 D-4
• DA-2 B-3 C-4 D-1

Question 3

A soil has liquid limit of 35, plastic limit of 20 and moisture content 25%. What will be its liquidity index and plasticity index

• A67, 15
• B0.33, 15
• C0.67, 25
• D0.33, 20

Question 4

A compacted sample of soil with bulk density of 2.0g/cm³ has a water content of 15%. What is its dry density? Assume G = 2.65

• A1.74 g/cm³
• B17.4 g/cm³
• C0.174 g/cm³
• D0.471 g/cm³

Question 5

A cohesive soil yields a maximum dry density of 18kN/m³ during a standard proctor compaction test. If the specific gravity is 2.65, what would be its void ratio? (Adopt unit of water as 9.81 kN/m³)

• A0.5523
• B0.44425
• C0.7121
• D0.5835

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