A cylindrical specimen of saturated soil failed under an axial vertical stress of 100kN/m2 when it was laterally unconfmed. The failure plane was inclined to the horizontal plane at an angle of 45°. The values of cohesion and angle of internal friction for the soil are respectively______________________?
(A) 0.5 N/mm2 and 30°
(B) 0.05 N/mm2 and 0°
(C) 0.2 N/mm2 and 0°
(D) 0.05 N/mm2 and 45°
Shear strength of a soil is a unique function of__________________?
(A) effective stress only
(B) total stress only
(C) both effective stress and total stress
(D) none of the above
Unconfmed compressive strength test is________________?
(A) undrained test
(B) drained test
(C) consolidated undrained test
(D) consolidated drained test
In a deposit of normally consolidated clay_________________?
(A) effective stress increases with depth but water content of soil and un-drained strength decrease with depth
(B) effective stress and water content increase with depth but undrained strength decreases with depth
(C) effective stress and undrained strength increase with depth but water content decreases with depth
(D) effective stress, water content and undrained strength decrease with depth
Skempton’s pore pressure coefficient B for saturated soil is________________?
(A) 1
(B) zero
(C) between 0 and 1
(D) greater than 1
The shear strength of a soil_________________?
(A) is directly proportional to the angle of internal friction of the soil
(B) is inversely proportional to the angle of internal friction of the soil
(C) decreases with increase in normal stress
(D) decreases with decrease in normal stress
For better strength and stability, the fine grained soils and coarse grained soils are compacted respectively as____________________?
(A) dry of OMC and wet of OMC
(B) wet of OMC and dry of OMC
(C) wet of OMC and wet of OMC
(D) dry of OMC and dry of OMC where OMC is optimum moisture content
For a loose sand sample and a dense sand sample consolidated to the same effective stress_____________?
(A) ultimate strength is same and also peak strength is same
(B) ultimate strength is different but peak strength is same
(C) ultimate strength is same but peak strength of dense sand is greater than that of loose sand
(D) ultimate strength is same but peak
With the increase in the amount of compaction energy________________?
(A) optimum water content increases but maximum dry density decreases
(B) optimum water content decreases but maximum dry density increases
(C) both optimum water content and maximum dry density increase
(D) both optimum water content and maximum dry density decrease
Direct measurement of permeability of the specimen at any stage of loading can be made_______________?
(A) only in fixed ring type consolido-meter
(B) only in floating ring type consolido-meter
(C) both (A) and (B)
(D) none of the above