1000 Best Soil and Foundation Engineering MCQ
Q185). A structure is erected on an impervious clay whose thickness is 12 m. Drainage is possible both at upper and lower surfaces. Coefficient of consolidation is 0.015 cm2 per minute. For attaining 50% consolidation with a time factor 0.20, the number of days required
a).3233
b).3123
c).33331
d).3313
Correct Answer:
33331
Explanation:
Q186). Which one of the following statements is true for Mohr-Coulomb envelope ?
a).Coulomb suggests that the relationship between shear strength and normal stress, is adequately represented by the straight line
b).The generalised Mohr theory suggests that, though the shear stress depends on the normal stress, the relation is not linear
c).Coulomb and Mohr suggest that a definite relationship exists among the principal stress and the angle of internal friction
d).All of the above
Correct Answer:
All of the above
Explanation:
Q187). The intensity of active earth pressure at a depth of 10 metres in dry cohesionless sand with an angle of internal friction of 30° and with a weight of 1.8 t/m3, is
a).4 t/m2
b).5 t/m2
c).6 t/m2
d).7 t/m2
Correct Answer:
6 t/m2
Explanation:
Q188). On wetting, cohesive soils,
a).loose permeability
b).gain shear strength
c).loose elasticity
d).decrease their shear strength.
Correct Answer:
decrease their shear strength.
Explanation:
Q189). ‘Talus’ is the soil transported by
a).wind
b).water
c).glacier
d).gravitational force.
Correct Answer:
gravitational force.
Explanation:
Q190). A triaxial shear test is prefered to direct shear test, because
a).it can be performed under all three driange conditions with complete control
b).precise measurement of pore pressure and change in volume during test, is not posible
c).stress distribution on the failure plane, is non uniform
d).none of these.
Correct Answer:
it can be performed under all three driange conditions with complete control
Explanation:
Q191). Pick up the correct statement from the following:
a).When stress decreases, void, ratio decreases
b).When stress decreases, coefficient of permeability decreases
c).When stress decreases, coefficient of volume change decreases
d).When stress decreases void ratio, co-effi-cients of per-meability and volume change decrease.
Correct Answer:
When stress decreases void ratio, co-effi-cients of per-meability and volume change decrease.
Explanation:
Q192). Chemical weathering of soil is caused due to
a).oxidation
b).carbonation
c).hydration
d).All of the above
Correct Answer:
All of the above
Explanation: