18 Questions
In the direct shear test, the normal stress is calculated as the load ring reading divided by the corrected area.
True
The shear stress is calculated as the shear force divided by the correct area, only at failure.
True
The friction angle is calculated as the tangent of the normal stress divided by the shear force.
False
The peak stress is the maximum shear stress reached during the direct shear test.
True
The horizontal dial gauge is used to measure the vertical displacement of the specimen.
False
The cohesion is calculated as the shear stress at failure minus the normal stress times the tangent of the friction angle.
True
The unconfined compression test is a type of triaxial test where the minor principal stress is equal to the applied axial stress.
False
The unconfined compressive strength is defined as the minimum compressive stress at failure.
False
A remolding device is required for testing undisturbed samples.
False
The balance is used to measure the axial deformation of the specimen.
False
The electrically driven strain-controlled device is a required apparatus for the unconfined compression test.
False
The objective of the unconfined compression test is to determine the shear strength of non-cohesive soil.
False
The aspect ratio of the specimen should be between 2 and 3 to prevent buckling action.
True
The final moisture content of the specimen is not a required measurement.
False
The corrected area is calculated as Ao/(1-Δh/Lo).
True
The axial force is calculated as the load ring reading divided by the corrected area.
False
The unconfined compression test is used to predict the bearing capacity of piles.
True
The Mohr's Circle is used to calculate the cohesion of the soil.
False
This quiz covers the concepts of direct shear test, frictional strength, and cohesion in soil mechanics. It includes formulas and diagrams related to the direct shear test, normal stress, and shear stress. Get ready to test your understanding of soil mechanics!
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