141.  For a clay slope of height of 10 m, the stability number is 0.05,7 = 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 in.

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142.  The compression resulting from a long term static load and consequent escape of pore water, is known as
A. compaction
B. consolidation
C. swelling
D. none of these.

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143.  Compression of soil occurs rapidly if voids are filled ?with
A. air
B. water
C. partly with air and partly with water
D. none of these.

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144.  The compressibility of clays, is caused due to :
A. expulsion of double layer water from in between the grains
B. sliping of particles to new positions of greater density
C. bending of particles as elastic sheets
D. all the above.

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145.  The pressure that builds up in pore water due to load increment on the soil, is termed
A. excess pore pressure
B. excess hydrostatic pressure
C. hydrodynamic pressure
D. all the above.

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146.  The reduction in volume of soil due to squeezing out of water from the voids, is termed
A. primary consolidation
B. primary compression
C. primary time effect
D. all the above.

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147.  A clay subjected to pressure in excess to its present over-burden, is said to be
A. pre-compressed
B. pre-consolidated
C. over-consolidated
D. all the above.

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