DHARM
N-GEO\OBJ.PM5 881OBJECTIVE QUESTIONS 881
- In the unit phase diagram for a soil mass:
(a) the volume of water is taken as unity
(b) the total volume is taken as unity
(c) the weight of solids is taken as unity
(d) the volume of solids is taken as unity - Grain specific gravity is more commonly used than mass or apparent specific gravity of
the soil in many calculations in soil mechanics because ............. - Generally speaking (i) clays are ............ in colour than sands; (ii) dry soil are............ in
colour than wet soil; (iii) Organic soils are ............ in colour than inorganic soils. - The shape of clay particles, as revealed by microscopic examination, is .............
- If Kerosene is used instead of water in the pycnometer method of determination of grain
specific gravity, the expression for the grain specific gravity
(a) should be multiplied by the specific gravity of Kerosene
(b) should be divided by the specific gravity of Kerosene
(c) should be added to the specific gravity of Kerosene
(d) is modified by subtracting the specific gravity of Kerosene - The trace moisture absorbed by a dry soil from the atmosphere is called .............
- The moisture content obtained by a rapid moisture tester is expressed as a percentage
of ............ weight of the soil. - For very dense gravelly sand it can sometimes happen that the density index as ob-
tained in the laboratory is greater than unity. What could be the reason? (One sentence
answer) - What is the primary reason for representing grain size to logarithmic scale in the grain
size distribution curve? (One sentence answer) - Stokes’ law gives the ............ of a spherical particle falling freely in an infinite liquid
medium. - Sodium Oxalate is used as a ............ agent in the sedimentation analysis.
- At liquid limit a soil has
(a) no shearing strength
(b) negligible or very small shear strength
(c) high shearing strength
(d) nothing to do with shearing strength. - When the plastic limit cannot be determined, the soil is reported to be .............
- Shrinkage index is the difference between ............ limit and ............ limit.
- Toughness index is the ratio of
(a) consistency index to flow index (b) flow index to plasticity index
(c) liquidity index to flow index (d) Plasticity index to flow index - In the laboratory method of determination of shrinkage limit, the volume of the dry soil
pat is determined by ............ method. - Shrinkage ratio is also the ............ specific gravity of the soil in the dry state.