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In the triaxial compression test, the application of additional axial stress (i.e. deviator stress) on the soil specimen produces shear stress on

In the triaxial compression test, the application of additional axial stress (i.e. deviator stress) on the soil specimen produces shear stress on Correct Answer all planes except horizontal and vertical planes

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Match the following in Column X with Column Y: Column X Column Y  P. In a triaxial compression test, with increase of axial strain in loose sand under drained shear condition, the volumetric strain  I. decreases  Q. In a triaxial compression test, with increase of axial strain in loose sand under undrained shear condition, the excess pore water pressure  II. Increase  R. In a triaxial compression test, the pore pressure parameter “B” for a saturated soil  III. remains same  S. For shallow strip footing in pure saturated clay, Terzaghi’s bearing capacity factor (Nq) due to surcharge  IV. is always 0.0.      V. is always 1.0.      VI. is always 0.5. Which one of the following combinations is correct?
In a triaxial compression test when drainage is allowed during the first stage (i. e. application of cell pressure) only and not during the second stage (i.e. application of deviator stress at constant cell pressure), the test is known as
Consider the following statements: 1. The water content of a soil remains unchanged during entire duration of a ‘quick test. 2. Effective stress cum shear parameters of clay can be obtained from drained triaxial shear test. 3. Strain-controlled shear test is a good option since this test procedure maintains better control on the rate of loading than other tests. Which of the above statements is/ are correct?
From an alloy, two specimens are machined and tested separately under tension and compression. The engineering stress-strain curves as well as the true stress-true strain curves for tension and compression are plotted in the same diagram. Identify the correct statements:
P. The engineering stress-strain curves in tension and compression are identical.
Q. The true stress-true strain curve in compression is lower than the true stresstrue strain curve in tension due to Bauschinger effect.
R. The true stress-true strain curve in tension is above the corresponding engineering stress-strain, curve.
S. The true stress-true strain curve in tension and compression are identical.
Tresca or maximum-shear stress criteria assumes that yielding occurs when the maximum shear stress reaches a value of the shear stress in the uniaxial tension test. Assume the principal stress being σ1, σ2, σ3 where σ1 is largest, and σ3 is the smallest principal stresses. Find the value of minimum shear stress to cause yielding, given that yield stress in tension is equal to σo?
Von-mises or Distortion-energy Criteria proposed that yielding will occur when the second invariant of the stress deviator J2 exceeds some critical value. The second invariant of the stress deviator J2 is equal to __________ b) 1/2 c) d) 1/2
A clay soil sample is tested in a triaxial apparatus in consolidated – drained conditions at a cell pressure of 100 kN/m2. What will be the pore water pressure at a deviator stress of 40 kN/m2?
What is the reason for preferring the triaxial shear test over the direct shear test?
When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor and W = Axial compressive load on the spring)
A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is $$\tau $$. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be