Civil Engineering MCQs

Page No. 246

Which of the following methods is more suitable for the determination of permeability of clayey soil ?


aconstant head method


b falling head method


c horizontal permeability test


dnone of the above



Coefficient of permeability of soil______________?


adoes not depend upon temperature


bincreases with the increase in temperature


c increases with the decrease in temperature


dnone of the above



Effective stress is______________?


athe stress at particles contact


ba physical parameter that can be measured


c important because it is a function of engineering properties of soil


dall of the above



Which of the following methods is best suited for determination of permeability of coarse-grained soils ?


aconstant head method


bfalling head method


cboth the above


dnone of the above


View Answer constant head method

If the permeability of a soil is 0.8 mm/sec, the type of soil is_______________?


agravel


bsand


csilt


dclay


View Answer sand

The hydraulic head that would produce a quick condition in a sand stratum of thickness 1.5 m, specific gravity 2.67 and voids ratio 0.67 is equal to_______________?


a1.0m


b 1.5 m


c2.0 m


d3m


View Answer 1.5 m

Effective stress on soil_____________?


a increases voids ratio and decreases permeability


bincreases both voids ratio and permeability


cdecreases both voids ratio and permeability


ddecreases voids ratio and increases permeability



Physical properties of a permeant which influence permeability are________________?


aviscosity only


bunit weight only


cboth viscosity and unit weight


dnone of the above



According to IS classification, the range of silt size particles is_________________


a4.75 mm to 2.00 mm


b 2.00 mm to 0.425 mm


c 0.425 mm to 0.075 mm


d0.075 mm to 0.002 mm


View Answer 0.075 mm to 0.002 mm

If the water table rises upto ground surface, then the___________________?


aeffective stress is reduced due to decrease in total stress only but pore water pressure does not change


beffective stress is reduced due to increase in pore water pressure only but total stress does not change


ctotal stress is reduced due to increase in pore water pressure only but effec-tive stress does not change


dtotal stress is increased due to de-crease in pore water pressure but effective stress does not change



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