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Self Analysis
IIT Kanpur
PREVIOUS Attempt:
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CURRENT Attempt:
-/10
What is Creep?
Time independent elastic deformation at constant temperature
Time independent plastic deformation at constant temperature
Time dependent elastic deformation at constant stress
Time dependent permanent deformation at a constant stress
Creep usually occurs at temperatures of:
< 0.2 Tm
> 0.4 Tm
at Tm
> Tm
(where Tm is the melting point of the material).
In the primary/transient stage, the creep rate:
Remains zero
Increases with time
Remains constant (non zero)
Decreases with time
In the secondary /steady state, the creep rate:
Remains zero
Increases with time
Remains constant (non zero)
Decreases with time
In the tertiary state, the creep rate:
Remains zero
Rapidly increases with time
Remains constant (non zero)
Rapidly decreases with time
In which state a balance between recovery and strain hardening is achieved?
During instantaneous strain
Primary Creep
Secondary Creep
Tertiary Creep
Which of the following DOES NOT affect creep rate:
Equicohesive temperature
Density of material
Applied Load/stress
Exposure time
As the temperature increases, the creep rate:
Increases
Does not change
Decreases
As the obstacle distance Decreases, the creep rate:
Decreases
Does not change
Increases
Comparatively between two materials, as the steady state creep rate of material-1 is lower (at constant temperature) with respect to material-2, it means:
Working life of material-1 will be higher compared to material-2
Working life of the material-1 will be same as that of material-2
Working life of material-2 will be higher compared to material-1
Density of material-2 is higher than that of material-1
Evaluate
Reset
Creep
Nano Indentation
Wetting
Fluorescence Micropscopy
Ionic Conductivity
People Involved
