Fatigue failure is time dependent failure. a) True b) False

Fatigue failure is time dependent failure.

a) True

b) False
by

1 Answer

Answer :

a) True
by

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For a homogeneous & isotropic body under hydrostatic pressure, which theory of elastic failure does not fail (a) Firstly Maximum Principal Theory (b) Secondly Maximum Shear Stress Theory (c) Thirdly Maximum Principal Energy Theory (d) None

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For a homogeneous & isotropic body under hydrostatic pressure, which theory of elastic failure fails (a) Firstly Maximum Principal Theory (b) Secondly Maximum Principal strain Theory (c) Thirdly Maximum Principal Energy Theory (d) None

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Theories of elastic failure while dealing with brittle materials consider the failure criterion as (a) Ultimate stress (b) Yield stress (c) Both ultimate and yield stress (d) None

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Theories of elastic failure while dealing with ductile materials consider the failure criterion as (a) Ultimate stress (b) Yield stress (c) Both ultimate and yield stress (d) None

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Theories of elastic failure establishes the (a) Firstly Reasons of failure (b) Secondly Reasons of safety (c) Both (a) & (b) (d) None

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Theories of elastic failure is the (a) Firstly analysis of the various failures (b) Secondly analysis of the strength of a material (c) Both (a) & (b) (d) None

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Under complex loading, theories of elastic failure establishes the (a) Margin of failure (b) Margin of safety (c) Both (a) & (b) (d) None

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Under complex loading, if elastic limit reaches in tension, then failure occurs due to (a) Firstly Maximum principal strain theory (b) Secondly Maximum principal theory of strain energy (c) Thirdly Maximum Principal stress theory (d) None

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Under complex loading, if elastic limit reaches in tension, then failure occurs due to (a) Firstly Maximum principal strain theory (b) Secondly Maximum principal theory of strain energy (c) Thirdly Maximum shear stress theory (d) None

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Finding allowable stress after the application of theories of failure ensures (a) Soundness of design (b) Lapses in design (c) Both (a) & (b) (d) None

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A ductile material may not meet a failure if it has been tested for the theories of failure (a) Firstly Maximum Principal Theory (b) Secondly Maximum Principal Strain Theory (c) Thirdly Maximum principal strain energy theory (d) None

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Why do we determine principal stresses? a. Failure is due to simple stress or strain b. Failure is due to complex stress or strain c. Both (a) & (b) d. None

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Feather key can be used to prevent axial motion between two elements. a) True b) False

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