Civil Engineering - Soil Mechanics and Foundation Engineering

31. 

For a clay slope of height of 10 m, the stability number is 0.05, γ = 2.0 t/m3, C = 2.5 t/m2, the critical height of the slope of the soil, is

A. 4.0 m
B. 12.5 m
C. 25.0 m
D. 15.0 m

Answer: Option C

Explanation:

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32. 

If σ0' and σ' represent initial and increased pressure ; e0 and e void ratios corresponding to initial and increased pressure ; and C0 the compression index (dimensionless), then, the virgin compression curve as expressed by Terzaghi empirical formula is

A. e = e0 + Cc log10 σ'/σ0'
B. e = e0 - Cc log10 σ'/σ0'
C. e0 = e - Cc log10 σ'/σ0'
D. e0 = e + Cc log10 σ0'/σ'

Answer: Option B

Explanation:

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33. 

The equation τ = C + σ tan φ is given by

A. Rankine
B. Coulomb
C. Culaman
D. Mohr.

Answer: Option B

Explanation:

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34. 

You are given a sample of soil containing coarse grains to determine its water content, you will use

A. pycnometer
B. oven-drying method
C. calcium carbide method
D. alcohol method.

Answer: Option A

Explanation:

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35. 

Pick up the incorrect statement from the following:

A. Compaction has no effect on the structure of a soil
B. Permeability decreases with increase in the dry density of a compacted soil
C. A wet side compacted soil is more compressible than a dry side compacted soil
D. Dry side compaction soils swell more when given access to moisture
E. None of the these.

Answer: Option A

Explanation:

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